Paradyne 3160-A2-GB21-50 User Manual

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AREA CODE CHANGE

Please note that the area code for Paradyne Corporation in Largo, Florida has changed from 813 to 727.

For any Paradyne telephone number that appears in this manual with an 813 area code, dial 727 instead.

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ACCULINK

316

X DATA SERVICE UNIT/

CHANNEL SERVICE UNIT

OPERATOR’S GUIDE

Document No. 3160-A2-GB21-50

January 1997

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ACCULINK 316x DSU/CSU

ACCULINK 316x Data Service Unit/Channel Service Unit

Operator’s Guide 3160-A2-GB21-50

6th Edition (January 1997)

Changes and enhancements to the product and to the information herein will be documented and issued as a new release.

Standalone

FCC Registration number: See label on unit Ringer Equivalence number (REN): See label on unit Canadian Certification number: See label on unit Canadian DOC Load number: See label on unit

Carrier Card

FCC Registration number: See label on unit Ringer Equivalence number (REN): See label on unit Canadian Certification number: See label on unit Canadian DOC Load number: See label on unit

Warranty, Sales, and Service Information

Contact your sales or service representative directly for any help needed. For additional information concerning warranty , sales, service, repair, installation, documentation, or training, use one of the following methods:

• Via the Internet: Visit the Paradyne World Wide Web site at http://www.paradyne.com

• Via Telephone: Call our automated call system to receive current information via fax or to speak with a company

representative.

— Within the U.S.A., call 1-800-870-2221 — International, call 813-530-2340

Trademarks

All products and services mentioned herein are the trademarks, service marks, registered trademarks or registered service marks of their respective owners.

Printed on recycled paper

This publication is protected by federal copyright law. No part of this publication may be copied or distributed, transmitted, transcribed, stored in a retrieval system, or translated into any human or computer language in any form or by any means, electronic, mechanical, magnetic, manual or otherwise, or disclosed to third parties without the express written permission of Paradyne Corporation, 8545 126th Avenue North, P.O. Box 2826, Largo, Florida 33779-2826.

Paradyne Corporation makes no representation or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for a particular purpose. Further, Paradyne Corporation reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of Paradyne Corporation to notify any person of such revision or changes.

A January 1997 3160-A2-GB21-50

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Important Safety Instructions

1. Read and follow all warning notices and instructions marked on the product or included in the manual.

2. When an ac power source is used, this product is intended to be used with a three-wire grounding type plug – a plug which has a grounding pin. This is a safety feature. Equipment grounding is vital to ensure safe operation. Do not defeat the purpose of the grounding type plug by modifying the plug or using an adapter.

Prior to installation, use an outlet tester or a voltmeter to check the ac receptacle for the presence of earth ground. If the receptacle is not properly grounded, the installation must not continue until a qualified electrician has corrected the problem.

If a three-wire grounding type power source is not available, consult a qualified electrician to determine another method of grounding the equipment.

3. Slots and openings in the cabinet are provided for ventilation. T o ensure reliable operation of the product and to protect it from overheating, these slots and openings must not be blocked or covered.

4. Do not allow anything to rest on the power cord and do not locate the product where persons will walk on the power cord.

Important Instructions

5. Do not attempt to service this product yourself, as opening or removing covers may expose you to dangerous high voltage points or other risks. Refer all servicing to qualified service personnel.

6. General purpose cables may be provided with this product. Special cables, which may be required by the regulatory inspection authority for the installation site, are the responsibility of the customer.

7. When installed in the final configuration, the product must comply with the applicable Safety Standards and regulatory requirements of the country in which it is installed. If necessary, consult with the appropriate regulatory agencies and inspection authorities to ensure compliance.

8. A rare phenomenon can create a voltage potential between the earth grounds of two or more buildings. If products installed in separate buildings are interconnected, the voltage potential may cause a hazardous condition. Consult a qualified electrical consultant to determine whether or not this phenomenon exists and, if necessary, implement corrective action prior to interconnecting the products.

9. Input power to the ac voltage configuration of this product must be provided by a UL-listed or CSA-certified power source with a Class 2 or Limited Power Source (LPS) output. Input power to the dc voltage configurations of this product must be provided by a National Electric Code (NEC) or a Canadian Electric Code (CEC) Class 2 circuit.

10. This product contains a coin cell lithium battery that is only to be replaced at the factory. Caution: There is a danger of explosion if the battery is incorrectly replaced. Replace only with the same type. Dispose of used batteries according to the battery manufacturer’s instructions. Attention: Il y a danger d’explosion s’il y a remplacement incorrect de la batterie. Remplacer uniquement avec une batterie du même type. Mettre au rebut les batteries usagées conformément aux instructions du fabricant.

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ACCULINK 316x DSU/CSU

Notices

11. In addition, if the equipment is to be used with telecommunications circuits, take the following precautions:

– Never install telephone wiring during a lightning storm. – Never install telephone jacks in wet locations unless the jack is specifically designed for

wet locations.

– Never touch uninsulated telephone wires or terminals unless the telephone line has been

disconnected at the network interface. – Use caution when installing or modifying telephone lines. – Avoid using a telephone (other than a cordless type) during an electrical storm. There may

be a remote risk of electric shock from lightning. – Do not use the telephone to report a gas leak in the vicinity of the leak.



THIS EQUIPMENT HAS BEEN TESTED AND FOUND TO COMPL Y WITH THE LIMITS FOR A CLASS A DIGITAL DEVICE, PURSUANT TO PART 15 OF THE FCC RULES. THESE LIMITS ARE DESIGNED TO PROVIDE REASONABLE PROTECTION AGAINST HARMFUL INTERFERENCE WHEN THE EQUIPMENT IS OPERATED IN A COMMERCIAL ENVIRONMENT. THIS EQUIPMENT GENERATES, USES, AND CAN RADIATE RADIO FREQUENCY ENERGY AND, IF NOT INSTALLED AND USED IN ACCORDANCE WITH THE INSTRUCTION MANUAL, MAY CAUSE HARMFUL INTERFERENCE TO RADIO COMMUNICATIONS. OPERATION OF THIS EQUIPMENT IN A RESIDENTIAL AREA IS LIKELY TO CAUSE HARMFUL INTERFERENCE IN WHICH CASE THE USER WILL BE REQUIRED TO CORRECT THE INTERFERENCE AT HIS OWN EXPENSE.

THE AUTHORITY TO OPERATE THIS EQUIPMENT IS CONDITIONED BY THE REQUIREMENTS THAT NO MODIFICATIONS WILL BE MADE T O THE EQUIPMENT UNLESS THE CHANGES OR MODIFICA TIONS ARE EXPRESSL Y APPROVED BY PARADYNE.



TO USERS OF DIGITAL APPARATUS IN CANADA: THIS CLASS A DIGITAL APPARATUS MEETS ALL REQUIREMENTS OF THE CANADIAN INTERFERENCE-CAUSING

EQUIPMENT REGULATIONS. CET APPAREIL NUMÉRIQUE DE LA CLASSE A RESPECTE TOUTES LES EXIGENCES DU RÉGLEMENT SUR LE

MATÉRIEL BROUILLEUR DU CANADA.

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Government Requirements and Equipment Return

Certain governments require that instructions pertaining to CSU and modem connection to the telephone network be included in the installation and operation manual. Specific instructions are listed in the following sections.

United States

NOTICE TO USERS OF THE UNITED STATES TELEPHONE NETWORK

1. This equipment complies with Part 68 of the FCC rules. On the equipment is a label that contains, among other information, the FCC registration number and ringer equivalence number (REN) for this equipment. The label is located on the bottom of the 3150 CSU, and on the 3151 CSU’s circuit card. If requested, this information must be provided to the telephone company.

2. There are two types of telephone lines associated with the standalone equipment. The T1 network connection should be made using a Universal Service Order Code (USOC) type RJ48C jack. The Service Order Code 6.0F should be specified to the telephone company when ordering the T1 line. In addition, the proper Facility Interface Code must be specified to the T elephone Company . The CSU can be configured to support any of the following framing format and line signaling techniques. The CSU’s configuration must correspond to the T1 line’s parameters. The 3150 CSU’s internal modem connects to the Public Switched T elephone Network using a USOC Type RJ11C jack. The Facility Interface Code 02LS2 along with the RJ11C jack should be specified to the telephone company when ordering a dial line for the modem. The 3151 CSU connects to the T1 network using the multi-line USOC-type RJ48H jack and does not have a PSTN interface.

Important Instructions

315x CSU Facility Interface Codes

Code

04DU9-BN 1.544 Mbps superframe format (SF) without line power 04DU9-DN 1.544 Mbps SF and B8ZS without line power 04DU9-1KN 1.544 Mbps ANSI ESF without line power 04DU-1SN 1.544 Mbps ANSI ESF and B8ZS without line power

Description

3. The ringer equivalence number (REN) is used to determine the quantity of devices which may be connected to the telephone line. Excessive RENs on the telephone line may result in the devices not ringing in response to an incoming call. In most, but not all areas, the sum of the RENs should not exceed five (5.0). T o be certain of the number of devices that may be connected to the line, as determined by the total RENs, contact the telephone company to determine the maximum RENs for the calling area.

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ACCULINK 316x DSU/CSU

4. If the 315x CSU causes harm to the telephone network, the telephone company will notify you in advance that temporary discontinuance of service may be required. But if advance notice is not practical, the telephone company will notify the customer as soon as possible. Also, you will be advised of your right to file a complaint with the FCC if you believe it is necessary.

5. The telephone company may make changes in its facilities, equipment, operations, or procedures that could affect the operation of the equipment. If this happens, the telephone company will provide advance notice in order for you to make the necessary modifications in order to maintain uninterrupted service.

6. If you experience trouble with this equipment, please contact your sales or service representative (as appropriate) for repair or warranty information. If the product needs to be returned to the company service center for repair, contact them directly for return instructions using one of the following methods:

• Via the Internet: Visit the Paradyne World Wide Web site at http://www.paradyne.com

• Via Telephone: Call our automated call system to receive current information via fax or

to speak with a company representative. — Within the U.S.A., call 1-800-870-2221 — International, call 813-530-2340

If the trouble is causing harm to the telephone network, the telephone company may request that you remove the equipment from the network until the problem is resolved.

7. The equipment’s modem cannot be used on public coin service provided by the telephone company . Connection to Party Line Service is subject to state tariffs. (Contact the state public utility commission, public service commission or corporation commission for information.)

8. FCC compliant telephone line cords with modular plugs are provided with this equipment. This equipment is designed to be connected to the telephone network or premises wiring using a compatible modular jack which is Part 68 compliant.

Canada

NOTICE TO USERS OF THE CANADIAN TELEPHONE NETWORK

The Canadian Department of Communications label identifies certified equipment. This certification means that the equipment meets certain telecommunications network protective, operational and safety requirements. The Department does not guarantee the equipment will operate to the user’s satisfaction.

Before installing this equipment, users should ensure that it is permissible to be connected to the facilities of the local telecommunications company. The equipment must also be installed using an acceptable method of connection. In some cases, the company’s inside wiring associated with a single line individual service may be extended by means of a certified connector assembly (telephone extension cord). The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations.

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Important Instructions

Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier. Any repairs or alterations made by the user to this equipment, or equipment malfunctions, may give the telecommunications company cause to request to disconnect the equipment.

CAUTION

Users should not attempt to make such connections themselves, but should contact the appropriate electric inspection authority, or electrician, as appropriate.

If your equipment is in need of repair, return it using the procedures described on page A in the front of this document.

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ACCULINK 316x DSU/CSU

G January 1997 3160-A2-GB21-50

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Preface

Objectives and Reader Assumptions iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Related Documents iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Reference Documents iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1. Introduction

Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Features 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Physical Description 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2. Installation

Overview 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Application Examples 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SNMP or T elnet Connection Examples 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . .

Important Instructions 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Optional Power Sources 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cabling Examples 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power-Up Self-Test 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3. Operation

Overview 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using the Front Panel 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Displaying Unit Identity 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Setting Customer Identification 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting the DTE Drop/Insert or Data Port for LED Display 3-9. . . . . . . . .

Displaying LED Conditions 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Changing Configuration Options 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring the DSU/CSU for SNMP or T elnet Access 3-14. . . . . . . . . . . . . .

Configuring SNMP Traps 3-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring DS0 Channels 3-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Providing Backup Capability 3-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting the Timing Source 3-32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Establishing Access Security on a Port 3-34. . . . . . . . . . . . . . . . . . . . . . . . . . .

Setting a Password 3-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Entering a Password to Gain Access 3-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Acquiring/Releasing the User Interface 3-35. . . . . . . . . . . . . . . . . . . . . . . . . . .

Enabling/Disabling the Front Panel 3-36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using the Integral Modem in Standalone DSU/CSUs 3-37. . . . . . . . . . . . . . . .

Enabling the Communication Port for Carrier-Mounted DSU/CSUs 3-41. . . .

Deactivating the Alarm Relay for Carrier-Mounted DSU/CSUs 3-43. . . . . . . .

Resetting the DSU/CSU 3-43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Download Operations 3-43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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ACCULINK 316x DSU/CSU

4. Maintenance

Overview 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Self-Test Health 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Device Health and Status 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Performance Reports 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Alarms 4-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SNMP Traps 4-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting 4-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T est Jacks 4-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T est Commands 4-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Remote Loopback T ests 4-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Local Loopback T ests 4-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T est Patterns 4-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lamp T est 4-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Displaying DSU/CSU T est Status 4-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendices

A. %"!' ! !( +                                     B. ! #'"!& +                                 C. "!(%'"! #'"!& +                                  D. ! &&! !'& +                                       E.   '& +                                    F.  ')"% %&&! !%"& +                        G. %"!' !  ('"! +                                 H. &*! % ! #%'"! +                              I. $(# !' &' +                                       

Glossary

Index

ii January 1997 3160-A2-GB21-50

Page 12

Preface

Objectives and Reader Assumptions

This operator’s guide contains installation, operation, and maintenance information for the ACCULINK 3160, 3161, 3164, or 3165 Data Service Unit (DSU)/Channel Service Unit (CSU).

It is assumed that you are familiar with the operation of digital data communication equipment. You should also be familiar with Simple Network Management Protocol (SNMP) if you want your DSU/CSU to be managed by an SNMP manager.

Introduction

Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Features 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DTE Drop/Insert (DSX-1) Interface 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Alarm Message Capability 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Front Panel Emulation 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Integral Modem 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Async Terminal Interface Support 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Telnet Access 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SNMP Management Support 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Physical Description 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Standalone DSU/CSU Front Panel 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Standalone DSU/CSU Rear Panel 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview

The DSU/CSU acts as an interface between the T1 digital network and the customer premises equipment, converting signals received from the DTE (Data T erminal Equipment) to bipolar signals that can be transmitted over T1 lines. Typical applications include shared access to network-based services, Local Area Network (LAN)/Wide Area Network (WAN) interconnection, and fractional T1 network applications.

In addition to the T1 network interface and the DTE Drop/Insert (DSX-1) interface, the Model 3160 provides two synchronous data ports while the Model 3164 provides four synchronous data ports. The Model 3165 provides one synchronous data port, but does not provide the DTE Drop/Insert (DSX-1) interface.

The Model 3161 (carrier-mounted DSU/CSU) provides two ports in addition to the DTE Drop/Insert (DSX-1) interface and is designed to fit into the COMSPHERE 3000 Series Carrier.

For more information about the carrier-mounted DSU/CSU, refer to the ACCULINK 3151 CSU and 3161

DSU/CSU General Information Guide and the COMSPHERE 3000 Series Carrier Installation Manual.

Features

The DSU/CSU optimizes network performance with a

wide range of features such as the following:

• Software configuration menu displayed via a liquid

crystal display (LCD) to permit quick and easy operation, and elimination of complicated hardware strapping.

• Local or remote configuration and operation

flexibility .

• Several loopback capabilities and test pattern

generators.

• DTE Drop/Insert (DSX-1) capability .

• Alarm message display/print capability .

• Front panel emulation via Windows-based Front

Panel Emulation software.

• Integral modem for standalone DSU/CSUs.

• Asynchronous (async) terminal interface support.

• T elnet access for remote async terminal operations.

• Network management provided through

industry-standard Simple Network Management Protocol (SNMP).

1-13160-A2-GB21-50 January 1997

Page 15

ACCULINK 316x DSU/CSU

DTE Drop/Insert (DSX-1) Interface

The DTE Drop/Insert interface allows DTEs/PBXs that support the DS1 signal format to share the T1 network with other high-speed equipment. This is available on 2-port and 4-port DSU/CSUs.

Alarm Message Capability

The DSU/CSU can be attached, either locally or remotely , to an ASCII terminal or printer to display or print alarm messages. Alarms can also be displayed on a PC that is using a terminal emulation package.

Front Panel Emulation

The DSU/CSU offers functionality through Front Panel Emulation software that is similar to that provided by the DSU/CSU front panel. The functionality of the front panel is available by clicking on the function keys with the mouse rather than by pressing keys from the actual front panel.

Integral Modem

The standalone DSU/CSUs contain an integral low-speed (2400 bps), V.22bis dial modem that enables communication with remote devices such as another 316x DSU/CSU, an ASCII terminal or printer, or a PC running the 3100 Series Front Panel Emulation software.

Async Terminal Interface Support

The DSU/CSU can be configured and managed from an asynchronous (async) terminal. The async terminal’s full screen display uses a menu hierarchy similar to the DSU/CSU’s front panel. You can perform device management and configuration operations as if you are using the DSU/CSU’ s front panel, but you do not have the limitation of the 2-line, 16-character LCD.

Telnet Access

Remote async terminal operations can be performed using T elnet access. Telnet is a Transmission Control Protocol/Internet Protocol (TCP/IP) service that supports a virtual terminal interface.

SNMP Management Support

SNMP is a network management protocol that is used to monitor network performance and status, and to report alarms (i.e., traps). T o function, SNMP requires a manager consisting of a software program housed within a workstation or PC; an agent consisting of a software program housed within a device (e.g., the DSU/CSU); and a Management Information Base (MIB) consisting of a database of managed objects. The DSU/CSU can be managed by any industry-standard SNMP manager.

T wo link layer protocols, Point-to-Point Protocol (PPP) and Serial Line Internet Protocol (SLIP), are supported for connection to an external SNMP manager or network device (e.g., a router).

The SNMP manager or network device can be directly connected to the communications (COM) port. An external LAN Adapter can be connected to either the COM port or the auxiliary (AUX) port to provide Ethernet connectivity. Also, the DSU/CSU can be daisy chained together by connecting the COM port of one device to the AUX port of the other, providing SNMP connectivity.

The SNMP management system can communicate to the DSU/CSU remotely through the Facility Data Link (FDL) or (for 2-port and 4-port DSU/CSUs) the synchronous data port’ s Embedded Data Link (EDL).

1-2 January 1997 3160-A2-GB21-50

Page 16

Introduction

Physical Description

The 316x Series consists of a Model 3160 DSU/CSU (2-port), a Model 3164 DSU/DSU (4-port), a Model 3165 DSU/CSU (1-port), and a Model 3161 (carrier-mounted) DSU/CSU.

For more information about the carrier-mounted DSU/CSU, refer to the ACCULINK 3151 CSU and 3161

DSU/CSU General Information Guide and the COMSPHERE 3000 Series Carrier Installation Manual.

ACCULINK

Standalone DSU/CSU Front Panel

The standalone DSU/CSU front panel contains,

• One 2-line, 16-alphanumeric-character-per-line

liquid crystal display (LCD)

• One 7-button keypad (three Function and four

directional keys)

• T welve light-emitting diodes (LEDs)

• Six test jacks for the Model 3160/3164 DSU/CSU,

and two test jacks for the Model 3165 DSU/CSU

The front panels are shown in Figures 1-1, 1-2,

and 1-3.

LCD

F1 F2 F3

3160

MON EQPT

NET

OutInOutInOut

FAIL TEST SIG OOF ALRM

NETWORK RXD

EER SIG ALRM PDVOOF BPV

Figure 1-1. 3160 DSU/CSU Front Panel

DTR TXD CTS RTS

496-1493

1-33160-A2-GB21-50 January 1997

Page 17

ACCULINK 316x DSU/CSU

ACCULINK

3164

MON EQPT

NET

OutInOutInOut

LCD

F1 F2 F3

FAIL TEST SIG OOF ALRM

NETWORK RXD

EER SIG ALRM PDVOOF BPV

Figure 1-2. 3164 DSU/CSU Front Panel

DTR TXD CTS RTS

496-1493

ACCULINK

3165

LCD

F1 F2 F3

NET

MON

Out

FAIL TEST SIG OOF ALRM

NETWORK

EER

DTR TXD CTS RTS

RXD

PORT

495-14567-0

Figure 1-3. 3165 DSU/CSU Front Panel

1-4 January 1997 3160-A2-GB21-50

Page 18

Introduction

Standalone DSU/CSU Rear Panel

The standalone DSU/CSU rear panel contains the connectors required for the operation of the DSU/CSU

POWER

NEC

CLASS 2

INPUT

AUX PORT

CAUTION:

AUX PORT OR COM PORT MUST NOT BE CONNECTED TO PSTN OR T1 NETWORK

Figure 1-4. 3160 DSU/CSU Rear Panel

(Figures 1-4, 1-5, and 1-6). The connectors and their functions are listed in T able 1-1.

COM PORT MODEM

DTE

NETWORK

PORT 2PORT 1CLOCK IN

494-14540

POWER

NEC

CLASS 2

INPUT

AUX PORT

CAUTION:

AUX PORT OR COM PORT MUST NOT BE CONNECTED TO PSTN OR T1 NETWORK

COM PORT MODEM

Figure 1-5. 3164 DSU/CSU Rear Panel

DTE

NETWORK

PORT 4PORT 3

PORT 2PORT 1CLOCK IN

494-14564

1-53160-A2-GB21-50 January 1997

Page 19

ACCULINK 316x DSU/CSU

POWER

NEC

CLASS 2

INPUT

PORT 1

CAUTION:

COM PORT MODEM

AUX PORT OR COM PORT MUST NOT BE CONNECTED TO PSTN OR T1 NETWORK

NETWORK

495-14565-01

Figure 1-6. 3165 DSU/CSU Rear Panel

Table 1-1

Standalone DSU/CSU Rear Panel Connectors

Name

POWER Supplies power to the DSU/CSU by providing an attachment for the ac power

module or the optional dc power cable (+24 or –48 Vdc).

AUX PORT Supports SNMP LAN Adapter or daisy-chain connections.

Function

COM PORT Provides access to a locally connected PC, ASCII terminal or printer, SNMP

management link, or async terminal interface.

MODEM Provides a connection to the integral modem for access to a remotely connected

PC, ASCII terminal or printer, SNMP management link, or async terminal

interface. NETWORK Provides access to the T1 network. DTE (Model 3160/3164) Provides access to the DTE Drop/Insert (DSX-1) interface. CLOCK IN (Models 3160/3164) Used to attach an external clock to the DSU/CSU. PORTs 1–4 Used to connect the customer’s synchronous data DTE to the DSU/CSU.

1-6 January 1997 3160-A2-GB21-50

Page 20

Installation

Overview 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Application Examples 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SNMP or Telnet Connection Examples 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Important Instructions 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Optional Power Sources 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing the +24 Vdc Power Supply 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing the Single –48 Vdc Power Supply 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing the Redundant –48 Vdc Power Supply 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cabling Examples 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power-Up Self-Test 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview

This chapter contains information for installing your standalone DSU/CSU. It includes application examples, cabling, and power-up information.

NOTE

Installation instructions for the carrier-mounted DSU/CSU are located in the

CSU and 3161 DSU/CSU General Information Guide COMSPHERE 3000 Series Carrier Installation Manual

ACCULINK 3151

and the

Application Examples

The DSU/CSU acts as an interface between the T1

digital network and the customer’s equipment.

The DSU/CSU is connected to the customer’s equipment through one of the synchronous data ports (POR Ts 1– 4) or the DTE Drop/Insert (DSX-1) interface. It is connected to the T1 digital network through the network interface.

NOTE

The DTE Drop/Insert (DSX-1) interface is only available on 2-port and 4-port DSU/CSUs.

Some common applications for the DSU/CSU are:

• Point-to-Point LAN interconnection (Figure 2-1).

• Shared access to network-based services

(Figure 2-2).

• Fractional T1 network applications (Figure 2-3).

2-13160-A2-GB21-50 January 1997

Page 21

ACCULINK 316x DSU/CSU

NETWORK

LAN

ROUTER

DSU/CSU

PBX

LAN

ROUTER

DSU/CSU

Figure 2-1. Point-to-Point Application Example

NETWORK SERVICES

DSU/CSU

Figure 2-2. Shared Access Application Example

LAN

ROUTER

496-15003-01

496-15004-0

LAN

ROUTER

DSU/CSU

FRACTIONAL

LAN

ROUTER

NETWORK

DSU/CSU

LAN

ROUTER

DSU/CSU

LAN

ROUTER

496-15005-01

Figure 2-3. Fractional T1 Application Example

2-2 January 1997 3160-A2-GB21-50

Page 22

Installation

SNMP or Telnet Connection Examples

The DSU/CSU can be connected to an SNMP or T elnet

system in a number of ways. Some examples include:

• Directly connecting the COM port to the SNMP or

T elnet device (Figure 2-4).

• Connecting the COM port to a network device (e.g.,

a router) (Figure 2-5).

• Connecting the COM port or the AUX port to an

external LAN Adapter for Ethernet connectivity

(Figure 2-6).

ETHERNET

PPP/SLIP

LAN

ROUTER

• Daisy chaining the COM port of one device to the

AUX port of the other (Figure 2-7).

• Remotely accessing the DSU/CSU through the

Facility Data Link (FDL) or the synchronous data port’s Embedded Data Link (EDL) (Figure 2-8).

NOTE

EDL is only available on 2-port and 4-port DSU/CSUs.

DSU/CSU

NETWORK

496-15006-01

Figure 2-4. Direct Connection

ETHERNET

LAN

ROUTER

PPP/SLIP

DSU/CSU

ara

dyn

Figure 2-5. Connection through a Router

NETWORK

496-15007-01

2-33160-A2-GB21-50 January 1997

Page 23

ACCULINK 316x DSU/CSU

ETHERNET

LAN

ROUTER

LAN

ADAPTER

DSU/CSU

PPP

Figure 2-6. Connection through a LAN Adapter

DSU/CSU

ETHERNET

LAN

ROUTER

PPP

DSU/CSU

NETWORK

496-15008-01

NETWORK

FDL/EDL

LAN

ADAPTER

PPP

Figure 2-7. LAN Adapter and Daisy Chaining

DSU/CSUDSU/CSU

LAN

ROUTER

NETWORK

PPP

LAN

ADAPTER

Figure 2-8. Remote Access through FDL/EDL

496-15009-01

ETHERNET

496-15010-0

2-4 January 1997 3160-A2-GB21-50

Page 24

Installation

Important Instructions

Read and follow all warning notices and instructions

marked on the DSU/CSU or included in this guide.

For a complete listing of the safety instructions, see the

Important Safety Instructions section at the beginning of

this guide.

HANDLING PRECAUTIONS

FOR

ST ATIC-SENSITIVE DEVICES

This product is designed to protect sensitive components from damage due to electrostatic discharge (ESD) during normal operation. When performing installation procedures, however, take proper static control precautions to prevent damage to equipment. If you are not sure of the proper static control precautions, contact your nearest sales or service representative.

Optional Power Sources

The DSU/CSU is typically powered by the ac power module. Use the following procedures only if you want to use an optional dc power source.

Using the optional dc power cable, the DSU/CSU is capable of operating on either a +24 Vdc power source, –48 Vdc single source battery, or –48 Vdc redundant source batteries (for power backup). T o use dc power, choose one of the following power supply types.

Installing the +24 Vdc Power Supply

T o install the DSU/CSU using a +24 Vdc power supply, refer to Figure 2-9 and use the following procedure.

T o install the +24 Vdc power supply,

1. Connect the green wire to a suitable earth ground.

2. Connect the white wire to the +24 Vdc return.

3. Connect the orange wire to the +24 Vdc source.

DSU/CSU POWER

PLUG

1 2 3 4 5 6

Figure 2-9. +24 Vdc Power Supply Pinouts

BLACK

RED

GREEN

WHITE

ORANGE

BLUE

4. Cut the black, red, and blue wires off at the outer insulation.

5. Plug the power connector into the DSU/CSU.

TO CUSTOMER-SUPPLIED BATTERY

X X

EARTH GROUND +24 VDC RETURN +24 VDC SOURCE

496-14298-0

2-53160-A2-GB21-50 January 1997

Page 25

ACCULINK 316x DSU/CSU

Installing the Single –48 Vdc Power Supply

T o install the DSU/CSU using a single source –48 Vdc power supply, refer to Figure 2-10 and use the following procedure.

T o install the –48 Vdc single source power supply,

1. Connect the black and red wires to the –48 Vdc return source.

DSU/CSU POWER

PLUG

1 2 3 4 5 6

BLACK

RED

GREEN

WHITE

ORANGE

BLUE

2. Connect the green wire to a suitable earth ground.

3. Connect the orange and blue wires to the –48 Vdc input source.

4. Cut the white wire off at the outer insulation.

5. Plug the power connector into the DSU/CSU.

TO CUSTOMER-SUPPLIED BATTERY

–48 VDC RETURN

EARTH GROUND

–48 VDC INPUT

496-14299-0

Figure 2-10. –48 Vdc Single Source Power Supply Pinouts

2-6 January 1997 3160-A2-GB21-50

Page 26

Installation

Installing the Redundant –48 Vdc Power Supply

T o install the DSU/CSU using a redundant –48 Vdc power supply, refer to Figure 2-11 and use the following procedure.

T o install the redundant –48 Vdc power supply,

1. Connect the black wire to the –48 Vdc return source B.

2. Connect the red wire to the –48 Vdc return source A.

DSU/CSU POWER

PLUG

1 2 3 4 5 6

BLACK

RED

GREEN

WHITE

ORANGE

BLUE

3. Connect the green wire to a suitable earth ground.

4. Connect the orange wire to the –48 Vdc input source B.

5. Connect the blue wire to the –48 Vdc input source A.

6. Cut the white wire off at the outer insulation.

7. Plug the power connector into the DSU/CSU.

TO CUSTOMER-SUPPLIED BATTERY

–48 VDC RETURN B –48 VDC RETURN A EARTH GROUND

–48 VDC INPUT B –48 VDC INPUT A

496-14300-0

Figure 2-11. –48 Vdc Redundant Source Power Supply Pinouts

2-73160-A2-GB21-50 January 1997

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ACCULINK 316x DSU/CSU

Cabling Examples

The DSU/CSU is supplied with an ac power module

and a VF cable for the integral modem.

MODEM

TERMINAL

COM

PORT

MODEM

PORT

NETWORK

PORT

PSTN

Optional cables are described in Appendix D, Pin

Assignments.

Figure 2-12 illustrates some cabling examples.

OR OR

SNMP

MANAGER

MODEM

PORT

MODEM

3164 DSU/CSU

FRONT

PANEL

POWER

CLASS 2

INPUT

POWER

COM PORT MODEM

AUX PORT

NEC

CAUTION:

AUX PORT OR COM PORT MUST NOT BE CONNECTED TO PSTN OR T1 NETWORK

SERIAL

PORT

T1 OR SERIAL CONNECTIONS DIAL CONNECTIONS

NETWORK

DTE

PORT 2PORT 1CLOCK IN

3160

DSU/CSU

NETWORK

PORT

T1 NETWORK

NETWORK

PORT

COM PORT MODEM

AUX PORT

AUX PORT OR COM PORT MUST NOT BE CONNECTED TO PSTN OR T1 NETWORK

TERMINAL

NETWORK

DTE

PORT 4PORT 3

PORT 2PORT 1CLOCK IN

ROUTER

496-14935

POWER

SNMP

MANAGER

3164

DSU/CSU

COM PORT

POWER

NEC

CLASS 2

CAUTION:

INPUT

Figure 2-12. Cabling Examples

2-8 January 1997 3160-A2-GB21-50

Page 28

Installation

Power-Up Self-Test

After you connect the DSU/CSU to a power source, the unit performs the power-up self-test to ensure that it is in good working order. The DSU/CSU performs this test on itself upon power-up or after a device reset, unless it has been disabled by the Self-T est configuration option (see Appendix C, Configuration Options).

The self-test includes a basic processor test, a limited memory test, a code checksum test, and basic verification tests of the internal components. The front panel LCD displays the progress and pass/fail status of these power-up tests.

The power-up self-test consists of the following steps:

1. Once the DSU/CSU is plugged in, the In Progress screen appears and the Fail LED blinks ON and Off continuously.

Self-Test: In Progress

If the self-test fails, the Failed screen appears for five seconds. The Fail LED lights, and an eight-digit failure code (xxxxxxxx) is displayed for use by service personnel to determine the cause of the self-test failure. The DSU/CSU continues to try to operate. If you are in doubt about the results of the self-test, use the Self-T est Health command to display the status of this test (see the Self-Test

Health section in Chapter 4, Maintenance).

Self-Test:

xxxxxxxx

Failed

4. The top-level menu screen appears.

DSU ESF Stat Test Cnfig

2. All the LEDs then start to flash simultaneously in the pattern twice ON, then Off. Then, the LCD begins to flash characters and numbers in the same pattern, alternating with the flashing LEDs.

3. If the self-test is successful, the Passed screen appears for one second, the Fail LED turns Off and the OK LED lights.

Self-Test: Passed

2-93160-A2-GB21-50 January 1997

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ACCULINK 316x DSU/CSU

2-10 January 1997 3160-A2-GB21-50

Page 30

Operation

Overview 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using the Front Panel 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LCD 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Keypad. 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Test Jacks. 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LEDs 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Displaying Unit Identity 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Setting Customer Identification 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting the DTE Drop/Insert or Data Port for LED Display 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Displaying LED Conditions 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Changing Configuration Options 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Displaying/Editing Configuration Options 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Saving Edit Changes 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting/Copying to a Specific Port 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring the DSU/CSU for SNMP or Telnet Access 3-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting the Port 3-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Setting the IP Address 3-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting the Link Layer Protocol 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Specifying the Community Name(s) and Access Type(s) 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring SNMP Traps 3-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Enabling SNMP Trap Messages 3-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting the Number of Trap Managers 3-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring a Destination for SNMP Traps 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring DS0 Channels 3-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Displaying DS0 Channel Assignments 3-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Allocating Data Ports 3-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Block or ACAMI Assignment Method 3-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Individual Channel Assignment Method 3-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Allocating DS0 Channels from the DTE Drop/Insert Interface to the Network Interface 3-29. . . . . . . . .

Clearing DS0 Channel Allocation 3-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Providing Backup Capability 3-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting the Timing Source 3-32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring for Network Timing 3-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring for External Timing 3-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Establishing Access Security on a Port 3-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Setting a Password 3-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Entering a Password to Gain Access 3-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Acquiring/Releasing the User Interface 3-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Acquiring the Active User Interface 3-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Releasing the Active User Interface 3-36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Enabling/Disabling the Front Panel 3-36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using the Integral Modem in Standalone DSU/CSUs 3-37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Entering Numbers in the Phone Directories 3-37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Initiating a Call for Front Panel Pass-Through Operation 3-39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Initiating a Call for PC, ASCII Terminal/Printer, or SNMP Operation 3-39. . . . . . . . . . . . . . . . . . . . . . . .

Disconnecting the Modem Connection 3-40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Enabling the Communication Port for Carrier-Mounted DSU/CSUs 3-41. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Deactivating the Alarm Relay for Carrier-Mounted DSU/CSUs 3-43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Resetting the DSU/CSU 3-43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Download Operations 3-43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-13160-A2-GB21-50 January 1997

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ACCULINK 316x DSU/CSU

Overview

This chapter contains information for operating your DSU/CSU. It includes a description of the front panel and sample procedures for configuring the DSU/CSU.

NOTE

Additional information for the carrier-mounted DSU/CSU is located in the

CSU and 3161 DSU/CSU General Information Guide COMSPHERE 3000 Series Carrier Installation Manual

ACCULINK 3151

and the

Using the Front Panel

The standalone DSU/CSU front panel (Figure 3-1) consists of an LCD, a keypad, test jacks, and 12 LEDs. The carrier-mounted DSU/CSU faceplate contains test jacks and 12 LEDs, however, the LCD and keypad are located on the Shared Diagnostic Control Panel (SDCP) of the 3000 Series Carrier. For more information about the SDCP, refer to the COMSPHERE 3000 Series Carrier Installation Manual.

NOTE

You can display a graphical representation of the DSU/CSU front panel on an attached PC

LCD

(see Appendix G,

Emulation

Front Panel

ACCULINK

3160

MON EQPT

NET

OutInOutInOut

F1 F2 F3

FAIL TEST SIG OOF ALRM

NETWORK RXD

EER SIG ALRM PDVOOF BPV

DTR TXD CTS RTS

Figure 3-1. Standalone DSU/CSU Front Panel

496-1493

3-2 January 1997 3160-A2-GB21-50

Page 32

Operation

LCD

The LCD (Figure 3-2) displays two types of data:

• Messages such as alarms, command/test

completion, and action in progress

• Front panel menu tree information (see

Appendix A, Front Panel Menu)

F1 F2

Figure 3-2. LCD

The LCD displays status messages as requested via the Device Health and Status branch of the front panel menu (see the Device Health and Status section in Chapter 4, Maintenance). In addition, the highest level status message appears on the front panel automatically if no front panel action has occurred at the DSU/CSU for the past five minutes.

The LCD also lists commands, configuration options, and test results. In most cases, the top line shows the command or option name and default value, while the second line displays options and responses. When a response is required, select from the options displayed directly above the Function keys (F1, F2, F3); make your choice by pressing the corresponding Function key.

Keypad

The 7-button keypad (Figure 3-3) enables you to navigate through the menu tree and select choices presented on the second line of the LCD.

F1 F2

Figure 3-3. Keypad

Use the

key to move up the menu.

F1 F2

Use the key to exit any part of the menu in which you may be operating. You immediately return to the top-level menu screen shown on the front panel menu (see Appendix A, Front Panel Menu).

F1 F2

Use the Function (F1, F2, F3) keys to make selections from the choices presented on the second line of the LCD. When this line presents choices, it is generally divided into three sections, each displayed directly above one of the Function keys. When your choice appears above one of the Function keys, press that key to select that choice.

F1 F2

3-33160-A2-GB21-50 January 1997

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ACCULINK 316x DSU/CSU

The scroll keys ( and ) serve one of two functions, depending on whether a menu screen or a data entry screen appears on the front panel.

For data entry screens, the character to the left while the

key scrolls one key scrolls one

character to the right.

For menu screens, the menu choice while the

key scrolls to the previous

key scrolls to the next menu

choice.

F1 F2

If a choice is available to the left of the screen, the character ← appears on the top line. If a choice is available to the right of the screen, the → character appears on the top line. If choices are available to both the right and the left of the screen, two arrows appear (

). The arrows indicate that you must use the scroll keys to bring the additional options onto the screen.

LEDs

There are twelve LEDs on the DSU/CSU front panel. The five LEDs on the right (Figure 3-5) are shared between the DTE Drop/Insert (DSX-1) interface and the data ports. Refer to the Selecting the DTE Drop/Insert or

Data Port for LED Display section on page 3-9 to

choose which port’s status the LEDs display.

NOTE

The DTE Drop/Insert (DSX-1) interface is only available on 2-port and 4-port DSU/CSUs.

Test Jacks

T est jacks are located on the DSU/CSU front panel (Figure 3-4). These are described in the Test Jacks section in Chapter 4, Maintenance. (The 3165 provides only the Network Monitor In and Network Monitor Out test jacks.)

NET MON EQPT

OutInOutInOut

496-1480

Figure 3-4. Test Jacks (Standalone DSU/CSU)

Figure 3-5. DSU/CSU LEDs

A green LED indicates normal operation. A yellow LED indicates a warning (for the DTE Drop/Insert interface) or activity (for the data ports). Conditions are sampled every tenth of a second.

The twelve front panel LEDs are grouped into four sections to indicate the status of the:

• System (Table 3-1)

• Network Interface (T able 3-2)

• DTE Drop/Insert (DSX-1) Interface (T able 3-3)

• Data Ports (Table 3-4)

3-4 January 1997 3160-A2-GB21-50

Page 34

Table 3-1

System LEDs

Operation

Name

OK Green Indicates the current operational state of the DSU/CSU.

FAIL Yellow Indicates a system failure or a self-test.

TEST Yellow A system test is in progress.

Color Meaning

ON: OFF:

BLINKING: FAST BLINK:

ON: OFF: BLINKING

ON:

OFF:

The DSU/CSU is operational and has power. The DSU/CSU is performing a power-up self-test or a system failure

has occurred. A software download is in progress. The carrier-mounted DSU/CSU is currently selected by the SDCP.

A device error/fault is detected or a reset has just occurred. No system failures are detected.

: A self-test is in progress.

A loopback or pattern test has been initiated either locally , by the network, or externally .

No tests are active.

Table 3-2

Network Interface LEDs

Name

SIG Green Monitors the signal being received from the network.

OOF Yellow Monitors Out Of Frame (OOF) conditions on the received network signal.

ALRM Yellow Indicates whether an alarm condition exists on the received network signal.

EER Yellow Indicates the Excessive Error Rate (EER) has been exceeded on the network interface.

Color Meaning

ON: OFF:

: At least one OOF was detected on the signal during the sampling

OFF:

ON:

OFF:

NOTE: This LED is only valid when ESF framing is being used.

ON: OFF:

A recoverable signal is being received from the network. The signal cannot be recovered from the network (a Loss of Signal

condition exists).

period. No OOFs were detected on the signal during the sampling period.

An alarm condition (LOS, LOF, EER, Yellow, AIS) exists on the received network signal. Use the Device Health and Status command to determine the alarm type.

No alarm condition exists on the network interface signal.

The EER has been exceeded on the network interface. The EER has not been exceeded on the network interface.

3-53160-A2-GB21-50 January 1997

Page 35

ACCULINK 316x DSU/CSU

The DTE Drop/Insert (DSX-1) interface is only available on 2-port and 4-port DSU/CSUs.

NOTE

Table 3-3

DTE Drop/Insert (DSX-1) Interface LEDs

Name

SIG Green Monitors the signal being received from the DTE Drop/Insert (DSX-1) interface.

OOF Yellow Monitors Out Of Frame (OOF) conditions on the received DTE Drop/Insert (DSX-1)

ALRM Yellow Indicates whether an alarm condition exists on the received DTE Drop/Insert (DSX-1)

PDV Yellow Monitors Pulse Density Violations (PDV) on the received DTE Drop/Insert (DSX-1)

Color Meaning

signal.

ON:

OFF:

ON:

OFF:

ON:

OFF:

: At least one PDV was detected (and corrected) on the received DTE

OFF:

A recoverable signal is being received from the DTE Drop/Insert (DSX-1) interface.

The signal cannot be recovered from the DTE Drop/Insert (DSX-1) interface (a Loss of Signal condition exists).

At least one OOF was detected on the signal during the sampling period.

No OOFs were detected on the signal during the sampling period.

An alarm condition (LOS, LOF, EER, Yellow, AIS) exists on the received DTE Drop/Insert (DSX-1) signal. Use the Device Health and Status command to determine the alarm type.

No alarm condition exists on the DTE Drop/Insert (DSX-1) interface signal.

Drop/Insert (DSX-1) signal during the sampling period. No PDVs were detected on the received DTE Drop/Insert (DSX-1)

signal during the sampling period.

BPV Yellow Monitors Bipolar Violations (BPV) on the received DTE Drop/Insert (DSX-1) signal.

ON:

OFF:

3-6 January 1997 3160-A2-GB21-50

At least one BPV was detected (and corrected) on the received DTE Drop/Insert (DSX-1) signal during the sampling period.

No BPVs were detected on the received DTE Drop/Insert (DSX-1) signal during the sampling period.

Page 36

Table 3-4

Data Port LEDs

Operation

Name

DTR Green Monitors the state of interchange circuit CD (CCITT 108/1, /2) – Data Terminal Ready

TXD Yellow Monitors activity on interchange circuit BA (CCITT 103) – Transmitted Data. This is the

RXD Yellow Monitors activity on interchange circuit BB (CCITT 104) – Received Data. This is data

CTS Yellow Monitors the state of interchange circuit CB (CCITT 106) – Clear-to-Send sent to the

Color Meaning

received from the synchronous data DTE.

ON: OFF:

data sent from the synchronous data DTE to the data port on the DSU/CSU.

ON: OFF: CYCLING:

sent to the synchronous data DTE from the data port on the DSU/CSU.

ON: OFF: CYCLING:

synchronous data DTE.

ON: OFF:

DTR is being asserted by the synchronous data DTE. DTR is not being asserted.

Ones are being received from the synchronous data DTE. Zeros are being received from the synchronous data DTE. Both ones and zeros are being received from the synchronous data

DTE.

Ones are being sent to the synchronous data DTE. Zeros are being sent to the synchronous data DTE. Both ones and zeros are being sent to the synchronous data DTE.

CTS is being asserted by the DSU/CSU. CTS is not being asserted.

RTS Yellow Monitors the state of interchange circuit CA (CCITT 105) – Request-to-Send received

from the synchronous data DTE.

ON: OFF:

RTS is being asserted by the synchronous data DTE. RTS is not being asserted.

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ACCULINK 316x DSU/CSU

NOTE

The following procedures are examples only. Screen displays

may vary depending on the model of the DSU/CSU.

Displaying Unit Identity

The identity of the DSU/CSU (serial number, model number, software revision level, hardware revision level, and customer identification) is available through the Status branch of the front panel menu (see Appendix A,

Front Panel Menu).

The customer identification is the only identity number you can change.

T o display the DSU/CSU’s identity (ID),

1. From the top-level menu screen, select Stat.

4. The following screens appear in the order listed each time you press the

key.

Identity:

xxxxxxx

Ser=

Identity:

xxxx-xx-xxx

Mod=

Identity: Cust ID=

xxxxxxxx

DSU ESF Stat Test Cnfig

2. From the Status screen, press the key until the ID selection appears on the screen.

3. Select ID.

Status: TStat LED ID

Identity: SRev=

Identity: CCA1=

Identity: CCA2=

xx.xx.xx

xxxx-xxx

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Operation

Setting Customer Identification

The customer identification is the only identity number you can change. It is used to uniquely identify the DSU/CSU.

T o change the customer identification (CID),

1. From the top-level menu, press the the Ctrl selection appears on the screen.

2. Select Ctrl.

3. From the Control screen, press the the CID selection appears on the screen.

4. Select CID.

Control: Reset CID Passwd

key until

Selecting the DTE Drop/Insert or Data Port for LED Display

Use the LED command on the Control branch to select which port’s (DTE Drop/Insert or data port) status appears on the five shared LEDs on the front panel.

T o select a port for LED display,

1. From the top-level menu screen, press the until the Ctrl selection appears on the screen.

2. Select Ctrl.

3. From the Control screen, select LED.

Control: Call Rel LED

The currently selected port name appears on the top line of the LCD. DTE indicates the DTE Drop/Insert (DSX-1) port.

key

5. Use the and keys to position the cursor under the desired character. You must enter a character before the

moves the cursor to the

next space to the right.

CustID:

xxxxxxxx

Up Down Save

6. Enter the desired ID. Press F1 (Up) and F2 (Down) to scroll up and down through the valid characters/numbers for the customer ID. Valid characters are 0 through 9, #, -, ., /, A to Z, and blank space. Press F3 (Save) to save the ID.

LED Dsply: DTE DTE Prt1 Prt2

4. From the LED Dsply screen, press the Function key that corresponds to the DTE Drop/Insert (DSX-1) or data port for which you want the LEDs to display. Use the scroll keys, if necessary.

Select DTE to monitor the DTE Drop/Insert (DSX-1) port’s SIG, OOF, ALRM, PDV, and BPV status signals on the shared LEDs.

Select a particular data port to monitor the data port’s DTR, TXD, RXD, CTS, and RTS control signals on the shared LEDs.

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ACCULINK 316x DSU/CSU

Displaying LED Conditions

The same conditions monitored by the front panel LEDs can also be monitored by the LED command. This command is most useful when the DSU/CSU is being accessed remotely (see Appendix G, Front Panel

Emulation). When using Front Panel Emulation, no LEDs

are shown on the PC’s screen; you must use the Stat command procedure described below to get LED information.

NOTE

The following procedure is an example only. Screen displays

may vary depending on the model of the DSU/CSU.

T o display LED conditions on the front panel screen,

1. From the top-level menu screen, select Stat.

2. From the Status screen, press the LED selection appears on the screen.

3. From the Status screen, select LED.

Status: Perf TStat LED

key until the

4. From the Select LEDs screen, press the Function key that corresponds to T1 interface or the data port for which you want to display LEDs. Use the scroll keys, if necessary.

Select LEDs: T1 Prt1 Prt2

If you chose T1, the LED Display screen lists the LED signals, two at a time, on the second line. A vertical bar at the left of the LED name indicates the condition is ON, while an underscore indicates the condition is Off.

LED Display: _Test _NetSig

If you chose a port, the Port n LEDs screen lists the LED signals, two at a time, on the second line. A vertical bar at the left of the LED name indicates the condition is ON, while an underscore indicates the condition is Off.

Port n LEDs: _DTR _TXD

5. Use the and keys to scroll LED names onto the screen.

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Operation

Changing Configuration Options

The DSU/CSU is an intelligent device that displays only valid options for the current configuration. Therefore, you are only presented with menu choices that are consistent with the current configuration and operational state of the DSU/CSU; invalid combinations of configuration options do not appear. For example, menus displayed for the Model 3160 (2 ports) and the Model 3164 (4 ports) differ due to the number of ports available. Also, if the DTE Drop/Insert (DSX-1) interface selection is disabled, many of the menu choices do not appear. Be aware that although all options are shown in this guide, what you see on your DSU/CSU varies with your configuration.

The DSU/CSU offers configuration options located in the following memory areas:

• Active (Activ). This is the configuration option set

currently active for the DSU/CSU. Before a configuration option set becomes active for the DSU/CSU, you must save the set to the Active area. When the DSU/CSU is shipped from the factory, the Active configuration option set is identical to the Factory set. This area can be written to and controls the current operation of the device.

• Customer 1 (Cust1). This is the first of two sets of

customer-defined configuration options. This area can be written to.

• Customer 2 (Cust2). This is the second of two sets

of customer-defined configuration options. This area can be written to.

• Factory 1 (Fact1). This is a set of configuration

options preset at the factory. This set is determined by what is considered to be the most common configuration used in the DSU/CSU market. Factory 1 options are read-only.

The configuration options are divided into functional groups. Appendix C contains a list of the configuration options and defaults. These groups are:

• DTE (DSX-1) Interface

• Port

• Network Interface

• Channel

• General

• User Interface

• Alarm

• General Management

• Management Trap

The DSU/CSU arrives with two preset factory default configuration settings. These settings are based on the following:

• Factory 1 – ESF framing format with B8ZS line

coding format for both the network and the DTE Drop/Insert (DSX-1) interfaces. Data ports are unassigned.

• Factory 2 – D4 framing format with AMI line

coding format for both the network and the DTE Drop/Insert (DSX-1) interfaces. Data ports are unassigned.

If neither of the factory default settings support your network’s configuration, you can customize the configuration options to better suit your application.

Use the Configuration (Cnfig) branch of the front panel menu tree to display or change DSU/CSU configuration options (see Appendix C, Configuration Options).

• Factory 2 (Fact2). This is a set of configuration

options preset at the factory. This set is determined by what is considered to be the second most common configuration used in the DSU/CSU market. Factory 2 options are read-only.

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ACCULINK 316x DSU/CSU

Displaying/Editing Configuration Options

T o display/edit configuration options,

1. From the top-level menu screen, select Cnfig.

DSU ESF Stat Test Cnfig

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

Load from: Activ Cust1

3. Select Edit.

4. From the Edit screen, select the functional group you want to edit by pressing the appropriate Function key. Use the scroll keys, if necessary. (The NET selection is shown as an example only.)

Edit: DTE Port NET

The configuration options for the selected functional group appear on the front panel one option at a time. The option name appears on Line 1 with the current value next to it. T o reach other options, use the Next and Previous selections to scroll forward and backward through the group of options.

NET Framing: ESF Next D4 ESF

Choose Funct: Edit Save

5. Press the appropriate Function key to choose another value. Use the scroll keys, if necessary.

6. Use the Save procedure to save your changes to the Active or Customer area.

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Operation

Saving Edit Changes

Save edit changes to the Active area when you want those changes to take effect immediately. Save edit changes to the Customer area when you want to overwrite the existing Customer configuration options and store these changes for future use.

NOTE

If you attempt to exit the Edit function after making changes without performing a Save, the DSU/CSU prompts you with Save Options? Choose Yes or No.

T o save edit changes,

1. From the Choose Funct screen (one level above the Edit screen, two levels below the top-level menu screen), select Save.

Choose Funct: Edit Save

Selecting/Copying to a Specific Port

For the DSU/CSU, you have the capability of selecting a specific port to configure, and then (for 2-port and 4-port DSU/CSUs) copying the configuration options from that port to another port (or to all ports).

NOTE

The following procedure is an example only. Screen displays

may vary depending on the model and configuration of the DSU/CSU.

T o select a specific port to configure,

1. From the top-level menu screen, select Cnfig.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

3. Select Edit.

4. From the Edit screen, select Port.

2. Choose whether you want to save to the Active, Customer 1, or Customer 2 area. Use the scroll keys, if necessary.

Save Edit to: Activ Cust1

Edit: DTE Port NET

5. From the Port Select screen, press the Function key that corresponds to the port you want to configure. Use the

key to scroll addition ports onto the screen, if necessary. Configure the port (see Appendix C, Configuration Options).

Port Select: Copy Prt1 Prt2

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ACCULINK 316x DSU/CSU

T o copy the configuration options to one or all ports,

1. From the Port Select screen, select Copy.

Port Select: Copy Prt1 Prt2

2. Select the port from which you want to copy the configuration options using the corresponding Function key.

Copy From: Prt1 Prt2 Prt3

3. Select the port to which you want to copy the configuration options using the corresponding Function key . Or, press F1 (All) to choose to copy to all ports.

Configuring the DSU/CSU for SNMP or Telnet Access

T o configure the DSU/CSU for SNMP or Telnet

access,

• Enable the SNMP agent or Telnet server within the

DSU/CSU (see Appendix C, Configuration

Options).

• Select and configure the port that provides the link

to the SNMP or T elnet system.

• Set the Internet Protocol (IP) address and subnet

mask needed to access the DSU/CSU (see Appendix F, IP Network Addressing Scenarios).

• Select the link layer protocol (PPP or SLIP) for the

port that provides the link to the SNMP or T elnet system.

• For SNMP links, specify the two community names

(and their access levels) that are allowed to access the device’s Management Information Base (MIB).

• For SNMP links, configure the device to send traps

to the SNMP manager, if desired.

• Specify the T elnet password or SNMP validation

options, if desired (see Appendix C, Configuration

Options).

Copy To: All Prt1 Prt2

Selecting the Port

The SNMP manager, Telnet device, or network device (e.g., a router) can be directly connected to the communications (COM) port. An external LAN Adapter can be connected to either the COM port or the auxiliary (AUX) port to provide Ethernet or T oken Ring connectivity. Also, the DSU/CSU can be daisy chained together by connecting the COM port of one device to the AUX port of the other, providing SNMP or Telnet connectivity . Use the MODEM port when accessing the DSU/CSU through a dial-up connection.

The COM port can support either synchronous or asynchronous PPP, or asynchronous SLIP at data rates of up to 38,400 bps. The AUX port can support data rates up to 38,400 bps. The MODEM port can support either synchronous or asynchronous PPP, or asynchronous SLIP at data rates of up to 2400 bps.

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Operation

The example shown below assumes that the COM port

is being used as the link to the SNMP or T elnet system.

T o select the COM port as the SNMP or Telnet link,

1. From the top-level menu screen, select Cnfig.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

3. Select Edit.

4. From the Edit screen, press the

key until the

User selection appears on the screen.

5. Select User.

Edit: Chan Gen User

Setting the IP Address

The IP address is the address used by the SNMP or

T elnet system to access the DSU/CSU (see Appendix F,

IP Network Addressing Scenarios). For DSU/CSUs using

PPP, the IP address can be negotiated if the network device (e.g., router or SNMP manager) supports such negotiation. The IP address is composed of four fields with three digits per field (xxx.xxx.xxx.xxx).

The IP address is set for the MODEM port, the COM port, or the AUX port (with LAN Adapter or daisy chain), depending on which one has been chosen as the SNMP or T elnet communication link. The example below assumes that an IP address of 010.155.111.222 is being set for the COM port. You can use the same principles to assign any value (between 000 and 255 for each digit field) to other ports.

T o assign an IP address to the COM port,

1. From the top-level menu screen, select Cnfig.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

6. Press F1 (Next) until the Com Use configuration option appears.

7. Select Mgmt to configure the COM port as the SNMP or T elnet link.

Com Use: Next Mgmt ASCII

3. Select Edit.

4. From the Edit screen, press the

key until the

Mgmt selection appears on the screen.

5. Select Mgmt.

Edit: User Alarm Mgmt

6. From the Mgmt Config screen, select Gen.

Mgmt Config: Gen Trap

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ACCULINK 316x DSU/CSU

7. Press F1 (Next) until the Com IP Adr configuration option appears.

NOTE

Steps 8 and 9 describe the process for entering an IP address. This process applies to any IP address.

8. Press F2 (Edit) to edit the IP address. You have the option of using F3 (Clear) to reset the IP address to the factory default 000.000.000.000.

Com IP Adr: Next Edit Clear

9. Use the and keys to position the cursor under the digit you want to change. Press F1 (Up) to increment the digit or F2 (Down) to decrement the digit. In this example, you would press once to place the cursor under the middle digit in the first digit field, then press F1 (Up) once to change the 0 to a 1. Continue in this manner to change the other digits.

Selecting the Link Layer Protocol

T wo link layer protocols, Point-to-Point Protocol (PPP) and Serial Line Internet Protocol (SLIP), are supported for connection to an external SNMP manager, Telnet device, or network device (e.g., a router). PPP can be used for synchronous or asynchronous operation. SLIP can be used for asynchronous operation only.

NOTE

The carrier-mounted DSU/CSU does not support synchronous operation on the COM port.

The standalone DSU/CSU implementation of PPP supports the following:

• Full negotiation of PPP’s Link Control Protocol

(LCP).

• Active negotiation of LCP when the connection is

established.

• Maximum Request Unit (MRU) sizes up to

1500 bytes, but the DSU/CSU will attempt to negotiate down to 500 bytes.

• The DSU/CSU provides a unique LCP magic

number derived from the unit serial number and the elapsed time.

• Full negotiation of escape characters.

000.000.000.000 Up Down Save

The DSU/CSU implementation of PPP does not support Link Quality Reports (LQR), compression, encryption, Password Authentication Protocol (PAP) or Challenge Handshake Authentication Protocol (CHAP).

The DSU/CSU implementation of SLIP supports a fixed MRU size of 1006 bytes.

10. When you are through changing the IP address,

you must press F3 (Save) to save the value. Otherwise, the original value will be retained.

Before selecting the protocol, you must first select the port to be used as the communications link. Refer to the

Selecting the Port section on page 3-14. This example

assumes that the COM port is being used as the communications link.

010.155.111.222 Up Down Save

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Operation

T o select the link layer protocol,

1. From the top-level menu screen, select Cnfig.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

3. Select Edit.

4. From the Edit screen, press the

key until the

Mgmt selection appears on the screen.

5. Select Mgmt.

Edit: User Alarm Mgmt

6. From the Mgmt Config screen, select Gen.

Specifying the Community Name(s) and Access Type(s)

You have the capability of specifying up to two community names (community name 1 and community name 2) to be used by external SNMP managers when trying to access objects in the DSU/CSU’s MIB. Once you specify the community name(s), you must then specify the type of access to the MIB that SNMP managers in the community are permitted to have.

T o specify the community name 1 and its access type,

1. From the top-level menu screen, select Cnfig.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

3. Select Edit.

4. From the Edit screen, press the Mgmt selection appears on the screen.

5. Select Mgmt.

key until the

Mgmt Config: Gen Trap

7. Press F1 (Next) until the Com Link configuration option appears.

8. Press F2 (PPP) or F3 (SLIP).

Com Link: Next PPP SLIP

Edit: User Alarm Mgmt

6. From the Mgmt Config screen, select Gen.

Mgmt Config: Gen Trap

7. Press F1 (Next) until the CommunityName1 configuration option appears.

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ACCULINK 316x DSU/CSU

8. Press F2 (Edit) to edit the community name.

CommunityName1: Next Edit Clear

NOTE

Steps 9 and 10 describe the process for entering text strings for Mgmt configuration options. This process applies to entering any text strings into Mgmt configuration options.

9. Use the and keys to position the cursor under the character you want to change. Press F1 (Up) or F2 (Down) to scroll through the valid numbers/characters for the text string.

public Up Down Save

The F1 (Up) key scrolls through the ASCII character set in the following order: numbers (0–9), lowercase letters (a–z), uppercase letters (A–Z), space character, ASCII symbols (ascending order, based on ASCII code), and the End of Line symbol (←). The ← erases all characters to the right of the cursor.

10. When you are through changing the community

name, you must press F3 (Save) to save the value. Otherwise, the original value will be retained.

11. Press F1 (Next) until the Access 1 configuration option appears.

12. Press F2 (Read) or F3 (R/W).

Access 1: Next Read R/W

The Read selection allows read-only access (SNMP “Get”) to the accessible objects in the MIB when community name 1 is used. The R/W selection allows Read/Write access (SNMP “Get” and “Set”) to the objects in the MIB. Write access is allowed for all objects specified as read/write in the MIB. Read access is allowed for all objects specified as read-only or read/write.

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Operation

Configuring SNMP Traps

A trap is an unsolicited message that is sent from the DSU/CSU to an SNMP manager when the DSU/CSU detects certain pre-specified conditions. These traps enable the SNMP manager to monitor the state of the network.

The SNMP Trap configuration option must be enabled for trap messages to be sent over the communications link. You must specify the number of SNMP managers that are to receive traps from this DSU/CSU, an IP address for each SNMP manager specified, and the type of traps to be sent from this DSU/CSU. For more information, refer to Appendix C, Configuration Options, and the SNMP Traps section in Chapter 4, Maintenance.

Enabling SNMP Trap Messages

T o enable SNMP trap messages from this DSU/CSU,

1. From the top-level menu screen, select Cnfig.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

3. Select Edit.

6. Press F1 (Next) until the SNMP Trap configuration option appears.

7. Press F2 (Enab) to enable trap messages over the SNMP management link.

SNMP Trap: Next Enab Disab

Selecting the Number of Trap Managers

If you intend to issue traps to an SNMP manager(s) from this device, you must specify the number of SNMP managers that are to receive the traps.

T o specify the number of SNMP managers to receive traps from this device,

1. From the top-level menu screen, select Cnfig.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

4. From the Edit screen, press the Alarm selection appears on the screen.

5. Select Alarm.

Edit: User Alarm Mgmt

key until the

3. Select Edit.

4. From the Edit screen, press the Mgmt selection appears on the screen.

5. Select Mgmt.

Edit: User Alarm Mgmt

key until the

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ACCULINK 316x DSU/CSU

6. From the Mgmt Config screen, select Trap.

Mgmt Config: Gen Trap

7. Select the number of SNMP managers to receive traps (from 1 through 6) by using the appropriate Function key. Use the scroll keys, if necessary.

Num Trap Mg rs:1 Next 1 2

Configuring a Destination for SNMP Traps

A destination must be configured for each SNMP trap manager specified. This configuration option is displayed for the number of trap managers specified by the Number of Trap Managers configuration option.

5. Select Mgmt.

Edit: User Alarm Mgmt

6. From the Mgmt Config screen, select Trap.

Mgmt Config: Gen Trap

7. Press F1 (Next) until the Trapn IP Address configuration option appears.

8. Press F2 (Edit) to edit the IP address. You have the option of using F3 (Clear) to reset the IP address to the factory default 000.000.000.000. Refer to the Setting the IP Address section on page 3-15 for more information on setting an IP address.

T o configure an IP address for the SNMP trap

manager,

1. From the top-level menu screen, select Cnfig.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

3. Select Edit.

4. From the Edit screen, press the

key until the

Mgmt selection appears on the screen.

9. Press F1 (Next) until the Trapn Destination configuration appears, and select the destination for the SNMP trap by using the appropriate Function key. Use the scroll keys, if necessary.

Trapn Dst: Next None Com

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Operation

Configuring DS0 Channels

The DSU/CSU provides channel configuration options

that allow you to do the following:

• Display the DS0 assignments for the network, DTE

Drop/Insert (DSX-1), and data port interfaces.

• Allocate DS0 channels on the DTE Drop/Insert

(DSX-1) interface to the network interface.

• Allocate DS0 channels on the network or DTE

Drop/Insert (DSX-1) interface to particular data ports.

• Clear (deallocate) all DS0 channels from the

network, DTE Drop/Insert (DSX-1), or data port interface.

• Map data from one port to another.

T o allocate DS0 channels, begin by defining the logical channel configuration for the network interface, and then the DTE Drop/Insert (DSX-1) interface, and then any ports, if desired. See Figure 3-6 for an example of a conceptual diagram of a channel configuration.

Blank configuration worksheets are provided at the back of Appendix C, Configuration Options. To complete the configuration worksheets for DS0 channel allocation:

1. Complete the Network Interface and the DTE Drop/Insert (DSX-1) Interface tables (unless the DTE Drop/Insert interface is disabled) as shown in the example in Figure 3-7.

2. Complete the Robbed Bit Signaling (RBS) information worksheet as shown in the example in

Figure 3-8.

NETWORK INTERFACE

N1 N2 N3 N4 N5 N6 N7 N8 N9 N10 N11 N12 N13 N14 N15 N16 N17 N18 N19 N20 N21 N22 N23 N24

DTE DROP/INSERT

(DSX-1) INTERFACE

D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 D17 D18 D19 D20 D21 D22 D23 D24

PORTS

PRT 1 PRT 2 PRT 3 PRT 4

496-14907-01

3. Using the worksheets shown in Figures 3-9 and 3-10, circle the configuration options needed to implement the logical channel configuration.

Once you have completed the worksheets, enter this information using the procedures in the Allocating Data

Ports section on page 3-27.

Figure 3-6. Example of Channel Allocation

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ACCULINK 316x DSU/CSU

Network Channel

N1 N2 N3 N4 N5 N6 N7 N8 N9 N10 N1 1 N12 N13

Network Interface

Allocation

D1 D2 D3 D4 D5

D9 D10 D1 1 D12 D15

DTE Drop/Insert (DSX-1) Interface

DTE (DSX-1) Channel

D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D1 1 D12 D13

Allocation

N1 N2 N3 N4 N5

N9 N10 N1 1 N12

N14 N15 N16 N17 N18 N19 N20 N21 N22 N23 N24 Allocations D1 – D24 indicates allocation to DTE

Drop/Insert (DSX-1) channels. Prt1 – Prt4 indicates allocation to

synchronous data ports.

Prt1 Prt1 Prt1 Prt3 Prt2 Prt2 Prt2 Prt2 Prt2 Prt2 Prt3

D14 D15 D16 D17 D18 D19 D20 D21 D22 D23 D24 Allocations N1 – N24 indicates allocation to network

channels.

N13

Figure 3-7. Example of Interface Worksheet

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Operation

DTE Chan

Config

D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D1 1 D12 D13 D14

Assign:

(N1 – 24)

N1 RBS N2 RBS N3 RBS N4 RBS N5 Data

N9 RBS N10 RBS N1 1 Data N12 Data

(RBS or Data)

Voice

D15 D16 D17 D18 D19 D20 D21 D22 D23 D24

N13 Data

Figure 3-8. Example of RBS Information Worksheet

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ACCULINK 316x DSU/CSU

ACAMI

Port Chan

Conf

Port 1

Options Value

Assign To NET, DTE, Prt2, Prt3, Prt4 Assign By Block, ACAMI, Chan

Port Rate Nx64: 64, 128, 192, 256, 320, 384, 448, 512, 576,

640, 704, 768, 832, 896, 960, 1024, 1088, 1 152, 1216, 1280, 1344, 1408, 1472, 1536

Nx56: 56, 1 12, 168, 224, 280, 336, 392, 448, 504,

If Assign By Block

Start At Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1,

Port Rate Nx64: 64, 128, 192, 256, 320, 384, 448, 512, 576,

If Assign By

Start At Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1,

If Assign By Chan Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1,

560, 616, 672, 728, 784, 840, 896, 952, 1008, 1064, 1 120, 1176, 1232, 1288, 1344

12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 (Select One)

640, 704, 768 Nx56: 56, 1 12, 168, 224, 280, 336, 392, 448, 504,

560, 616, 672

12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 (Select One)

12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 (Select Multiple)

Port 2

Assign To NET, DTE, Prt1, Prt3, Prt4 Assign By Block, ACAMI, Chan

Port Rate Nx64: 64, 128, 192, 256, 320, 384, 448, 512, 576,

640, 704, 768, 832, 896, 960, 1024, 1088, 1 152, 1216, 1280, 1344, 1408, 1472, 1536

Nx56: 56, 1 12, 168, 224, 280, 336, 392, 448, 504,

If Assign By Block

Start At Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1,

Port Rate Nx64: 64, 128, 192, 256, 320, 384, 448, 512, 576,

If Assign By

Start At Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1,

If Assign By Chan Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1,

560, 616, 672, 728, 784, 840, 896, 952, 1008, 1064, 1 120, 1176, 1232, 1288, 1344

12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 (Select One)

640, 704, 768 Nx56: 56, 1 12, 168, 224, 280, 336, 392, 448, 504,

560, 616, 672

12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 (Select One)

12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 (Select Multiple)

Figure 3-9. Port Channel Configuration Worksheet (Ports 1 and 2)

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Operation

ACAMI

Port Chan

Conf

Port 3

Options Value

Assign To NET, DTE, Prt1, Prt2, Prt4 Assign By Block, ACAMI, Chan

Port Rate Nx64: 64, 128, 192, 256, 320, 384, 448, 512, 576,

640, 704, 768, 832, 896, 960, 1024, 1088, 1 152, 1216, 1280, 1344, 1408, 1472, 1536

Nx56: 56, 1 12, 168, 224, 280, 336, 392, 448, 504,

If Assign By Block

Start At Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1,

Port Rate Nx64: 64, 128, 192, 256, 320, 384, 448, 512, 576,

If Assign By

Start At Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1,

If Assign By Chan Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1,

560, 616, 672, 728, 784, 840, 896, 952, 1008, 1064, 1 120, 1176, 1232, 1288, 1344

12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 (Select One)

640, 704, 768 Nx56: 56, 1 12, 168, 224, 280, 336, 392, 448, 504,

560, 616, 672

12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 (Select One)

12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 (Select Multiple)

Port 4

Assign To NET, DTE, Prt1, Prt2, Prt3 Assign By Block, ACAMI, Chan

Port Rate Nx64: 64, 128, 192, 256, 320, 384, 448, 512, 576,

640, 704, 768, 832, 896, 960, 1024, 1088, 1 152, 1216, 1280, 1344, 1408, 1472, 1536

Nx56: 56, 1 12, 168, 224, 280, 336, 392, 448, 504,

If Assign By Block

Start At Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1,

Port Rate Nx64: 64, 128, 192, 256, 320, 384, 448, 512, 576,

If Assign By

Start At Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1,

If Assign By Chan Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1,

560, 616, 672, 728, 784, 840, 896, 952, 1008, 1064, 1 120, 1176, 1232, 1288, 1344

12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 (Select One)

640, 704, 768 Nx56: 56, 1 12, 168, 224, 280, 336, 392, 448, 504,

560, 616, 672

12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 (Select One)

12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 (Select Multiple)

Figure 3-10. Port Channel Configuration Worksheet (Ports 3 and 4)

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NOTE

The following procedures are examples only. Screen displays

may vary depending on the model and configuration of the DSU/CSU.

Displaying DS0 Channel Assignments

Use the Display command (in the Channel Configuration branch) to view how the DS0 channels are currently allocated.

Line 1 of the display shows the 24 channels of the selected interface. Pressing the channels onto the screen in groups of three. Line 2 displays what is allocated to the DS0 channel listed in Line 1. Symbols used in the display are shown in

T able 3-5.

Table 3-5

Display Channel Symbols

Symbol

or key scrolls the

Meaning

4. From the Edit screen, press the

key until the

Chan selection appears on the screen.

5. Select Chan.

Edit: Port NET Chan

6. From the Channel Config screen, select Dsply.

Channel Config: Dsply Clear DTE

7. From the Display Chan screen, select NET to display the channels allocated to the network interface. Or, select DTE to display the channels allocated to the DTE Drop/Insert (DSX-1) interface.

– The DS0 channel is not allocated. Prt

The DS0 channel is allocated to Port n, where n is 1, 2, 3, or 4.

The DS0 channel is allocated to the network interface DS0 channel

can be any number from 1 through 24.

The DS0 channel is allocated to the DTE Drop/Insert (DSX-1) interface DS0 channel from 1 through 24.

, where n can be any number

T o display the DS0 channel allocation,

1. From the top-level menu screen, select Cnfig.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

3. Select Edit.

, where

Display Chan: NET DTE Ports

8. If you selected NET the channels allocated to the network interface are displayed. Line 1 displays the 24 channels for the network interface, while Line 2 displays what is allocated to the DS0 channel shown in Line 1. Pressing the

or key scrolls the channels onto the screen in groups of three.

N1 N2 N3 D2 D3 Prt1

If you selected DTE, the channels allocated to the DTE Drop/Insert (DSX-1) interface are displayed.

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Operation

Line 1 displays the 24 channels for the DTE Drop/Insert (DSX-1) interface, while Line 2 displays what is allocated to the DS0 channel shown in Line 1.

D1 D2 D3 –N1N2

Allocating Data Ports

By using the configuration options, assign a specific port to DS0 channels on either the network interface or the DTE Drop/Insert (DSX-1) interface. The following methods are available to assign DS0 channels to the port:

Block – Allows a block of contiguous channels to be assigned by specifying a data port rate and an initial DS0 channel (the first DS0 channel in a block of DS0 channels). The number of channels assigned is determined by the port rate. Only those initial DS0 channel numbers that provide enough bandwidth (based on the port’s data rate) are displayed on the screen. These channels are automatically assigned to the destination T1 interface (Network or DTE Drop/Insert) when the initial DS0 channel is selected.

ACAMI (Alternate Channel Alternate Block Inversion) – Allows a block of contiguous channels to be

assigned by specifying a data port rate and an initial DS0 channel (the first DS0 channel in a block of DS0 channels). However, with ACAMI, the number of channels assigned is twice the number needed for the port rate. This is because with ACAMI, every alternate DS0 channel (starting with the n+1 DS0 channel), does not carry data from the port, but instead always transmits and receives all ones.

Chan (Channel) – Individually selects the DS0 channels to allocate to the data port. The data port rate is automatically determined based on the number of channels selected.

Once a port is selected, you have access to the configuration options to complete the port allocation procedure. These configuration options enable you to,

• Assign the selected port to the desired interface.

• Select the desired method for channel allocation.

• Select the port rate and starting channel (if the

allocation method is block or ACAMI).

• Select the specific channels (if the allocation

method is by individual channel).

T o select the data port,

1. From the top-level menu screen, select Cnfig.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

3. Select Edit.

4. From the Edit screen, press the

key until the

Chan selection appears on the screen.

5. Select Chan.

Edit:DTE Port NET Chan

6. From the Channel Config screen, press the key to scroll the ports onto the screen.

7. Select the desired port by pressing its corresponding Function key.

Channel Config: Prt1 Prt2 Prt3

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8. The configuration option for the data port channel allocation destination appears on the screen. Select NET to assign this port to the network interface, select DTE to assign this port to the DTE Drop/Insert (DSX-1) interface, or press the key and the appropriate Function key to assign this port to another port.

Assign To:NET Next NET DTE

9. Press F1 (Next) to display the appropriate configuration options on the screen. Use one of the following examples, depending on whether you are assigning by block, ACAMI, or individual channel.

Block or ACAMI Assignment Method

The Assign By configuration option screen appears

after you select a port.

2. Press F1 (Next) to display the next configuration option (Port Rate).

3. Use the

or key to scroll the desired port rate onto the screen. Rates scroll in groups of three. A vailable selections depend on the current base rate selected for the port. Press the corresponding Function key to select the port rate. Then, select Next to display the Start At configuration option on the screen.

Port Rate:384 Next 64 128

NOTE

For port-to-port mapping, the procedure is complete after the port rate is selected.

T o assign by the block or ACAMI method,

1. Press F2 for Block or F3 for ACAMI.

Assign By: Next Block ACAMI

4. The Start At screen displays the configuration option used to select the starting DS0 channel. If the destination selected is the network interface, then the network channels appear on the screen. If the destination selected is the DTE Drop/Insert (DSX-1) interface, then these channels appear on the screen.

The following screen shows an example for the network interface. Use the

or key to scroll the desired channel onto the screen. Use the Function keys to select the starting channel. Only those DS0 channel numbers that provide enough bandwidth (based on the configured data rate) to be used as a starting channel number are displayed. Channel allocation for this port can only be cleared by selecting Clear.

Start At:Clear Next Clear N1

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Operation

Individual Channel Assignment Method

The Assign By configuration option screen appears

after you select a port.

T o assign by the individual channel method,

1. Press the onto the screen.

2. Press F3 (Chan).

key once to bring the Chan selection

Assign By:Block Next Block ACAMI

Assign By:Chan Block ACAMI Chan

Allocating DS0 Channels from the DTE Drop/Insert Interface to the Network Interface

By using the configuration options, you can allocate DS0 channels from the DTE Drop/Insert (DSX-1) interface to the network interface and specify which DS0 channels carry Robbed Bit Signaling (RBS) information for voice channels.

T o allocate DS0 channels from the DTE Drop/Insert (DSX-1) interface to the network interface,

1. From the top-level menu screen, select Cnfig.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

3. Select Edit.

4. From the Edit screen, press the Chan selection appears on the screen.

5. Select Chan.

key until the

3. Press F1 (Next) to display the next configuration option (channel allocation).

4. Line 1 displays the 24 channels for the network interface or the DTE Drop/Insert (DSX-1) interface, depending on which destination was chosen. This example assumes that the network is the destination. Line 2 displays what is allocated to the DS0 channel shown in Line 1. Pressing the

or key scrolls the channels onto the screen in groups of three. Select the channel by pressing the Function key under the desired number. Portn appears. The port is assigned to that channel. T o deallocate a port, press the Function key under that port number. Pressing the Function key under channels assigned to other ports has no effect.

N1 N2

Next Prt1 Prt2

Edit: Port NET Chan

6. From the Channel Config screen, select DTE.

Channel Config: Dsply Clear DTE

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7. From the DTE Channels screen, press F1 to select Assign.

DTE Channels: Assign Voice

8. Press the Function key below the network channel desired. Each time that you press the Function key, the DTE channel number will scroll up one number. If the network channel is currently unassigned (‘‘–” is displayed on Line 2), the DTE channel number initially displays the same number as the corresponding network channel number. However, if the network channel is currently assigned, the DTE channel number is shown as Dn. Pressing the Function key for D24 wraps the display back to D1. Only those channels that are not already assigned will appear on the LCD when scrolling. The network channels assigned to ports (Prt1...Prt4) are unavailable for assignment.

N1 N2 N3 D1 D2 –

T o specify DTE Drop/Insert (DSX-1) channels used to

carry voice information,

1. Press from the channel allocation screen to return to the DTE Channels screen.

N1 N2 N3 D1 D2 –

2. From the DTE Channels screen, press F2 to select Voice.

DTE Channels: Assign Voice

3. Line 1 displays the 24 DS0 channels for the DTE Drop/Insert (DSX-1) interface. Pressing the

key scrolls the channels onto the screen in groups of three. Line 2 displays whether the DS0 channel in Line 1 is a data channel (Data) or a voice (RBS) channel. Each time that you press the Function key located below the desired channel, the display in Line 2 toggles between Data and RBS.

D1 D2 D3 RBS RBS RBS

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Operation

Clearing DS0 Channel Allocation

You can clear (deallocate) all the DS0 channels currently allocated to either the network interface, the DTE Drop/Insert (DSX-1) interface, or the synchronous data ports.

T o clear DS0 channel allocation,

1. From the top-level menu screen, select Cnfig.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

3. Select Edit.

4. From the Edit screen, press the Chan selection appears on the screen.

5. Select Chan.

Edit: Port NET Chan

key until the

7. From the Clear Channel screen, select NET to clear all DS0 channels assigned to the network interface. Or, select DTE to clear all DS0 channels assigned to the DTE Drop/Insert (DSX-1) interface. Or, select a port to clear all assignments for that data port.

Clear Channel: NET DTE Port1

Providing Backup Capability

If the T1 network fails, the DSU/CSU provides the ability to reconfigure the unit and restore (at least partially) priority data circuits through an external backup device.

You can store backup configuration options in the Customer 2 set of customer-defined configuration options. The Enterprise MIB variable devConfigAreaCopy allows the entire contents of one configuration area to be copied into another configuration area via SNMP.

6. From the Channel Config screen, select Clear.

Channel Config: Dsply Clear DTE

By cross-connecting two synchronous data ports to each other, one port can provide a backup path for the other. As soon as the ports are configured to be mapped to each other, Data Set Ready (DSR) for the ports is turned on. The external backup device can be configured to initiate dialing when it detects the off-to-on transition of DSR.

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Selecting the Timing Source

The DSU/CSU provides the ability to select a master clock (timing) source that is used to synchronize all of the T1 and data port interfaces on the DSU/CSU. The clock for each interface is at the appropriate rate for that interface (e.g., 1.544 Mbps for the T1 interfaces, the configured port rate for the data ports), and it is independent of the master clock rate. This means that the master clock rate and the DSU/CSU interface rates may be different.

The clock source configuration options enable you to select either the network interface, a synchronous data port, the internal clock, the DTE Drop/Insert (DSX-1) interface, or an external clock. If external clocking is selected, you must use the clock rate configuration option to specify the clock rate. Figure 3-11 shows some

CLOCK: NETWORK CLOCK: NETWORK

common clocking configurations. T wo sample procedures for configuring timing are given in the following sections,

Configuring for Network Timing and Configuring for External Timing. For more information on configuration

options, refer to Appendix C.

NOTE

The external clock source is only available for 2-port and 4-port DSU/CSUs. For carrier-mounted DSU/CSUs, the external clock provides timing for up to eight slots in the carrier. Each Auxiliary Backplane must have its own external clock input.

NETWORK

TERMINAL

EQUIPMENT

CLOCK: EXTERNAL CLOCK: NETWORK

PBX

CLOCK: DTE (G.703) CONNECTOR

CLOCK: PORT 1, 2, 3, OR 4

Figure 3-11. Common Clocking Configurations

CLOCK: NETWORKCLOCK: INTERNAL

CLOCK: NETWORK

496-14341-03

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Operation

Configuring for Network Timing

T o configure for network timing,

1. From the top-level menu screen, select Cnfig.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

3. Select Edit.

4. From the Edit screen, press the Gen selection appears on the screen.

5. Select Gen.

Edit: NET Chan Gen

key until the

3. Select Edit.

4. From the Edit screen, press the

key until the

Gen selection appears on the screen.

5. Select Gen.

Edit: NET Chan Gen

6. Press F1 (Next) to display the next configuration option (Clock Src).

7. Select the master clock source. For external, press

key until the Ext selection appears on the

the screen.

8. Select Ext (external timing).

6. Press F1 (Next) to display the next configuration option (Clock Src).

7. Select the master clock source. For network, press F2 (note that network is also the default).

Clock Src:NET Next NET DTE

Configuring for External Timing

T o configure 2-port and 4-port DSU/CSUs for external

timing,

1. From the top-level menu screen, select Cnfig.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

Clock Src:Ext Prt1 Int Ext

9. Select the appropriate external clock rate by pressing the corresponding Function key. This step is mandatory if you have chosen external clocking.

Clock Rate:1544 Next 2048 1544

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Establishing Access Security on a Port

Although the password feature is available, it is not required as a factory default. If used, it ensures access security before device control is passed to a device connected to a port. The password configuration option can be individually set for the COM or MODEM port, or both if security is needed on both port types. The default is None. The password itself is set separately (refer to the following section, Setting a Password).

T o establish access security on a port,

1. From the top-level menu screen, select Cnfig.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

3. Select Edit.

4. From the Edit screen, press the User selection appears on the screen.

key until the

Setting a Password

In addition to establishing access security on a port

(refer to the previous section, Establishing Access

Security on a Port) the password itself is set. Unless you

specify otherwise, the password is null.

T o set a password,

1. From the top-level menu screen, press the key until the Ctrl selection appears on the screen.

2. Select Ctrl.

3. From the Control screen, press the the Passwd selection appears on the screen.

4. Select Passwd.

Control: Reset CID Passwd

key until

5. Select User.

Edit: Chan Gen User

6. Press F1 (Next) until the Password configuration option appears.

7. Select port(s) to receive access security (None, Com, Modem, or Both). Use the scroll keys, if necessary.

Password:None Next None Com

5. Use the and keys to position the cursor under the desired character. You must enter a character before the

moves the cursor to the

next space to the right.

Passwd:

xxxxxxxx

Up Down Save

6. Enter the desired password. Press F1 (Up) and F2 (Down) to scroll up and down through the valid characters/numbers for the password. Valid password characters are 0–9, a–z, A–Z, #, –, ., and /. Press F3 (Save) to save the password.

Passwd:

xxxxxxxx

Up Down Save

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Operation

Entering a Password to Gain Access

You are prompted to enter a password (up to 8 characters) when you are accessing a port whose Password configuration option is set (refer to the previous section, Setting a Password).

Valid password characters are 0–9, a–z, A–Z, #, -, ., and /. The existing password is not shown on the screen. An underscore in the first position shows where to enter the first character. If the password is set to all null characters (default value), press F3 (Done) when the password screen first appears.

The following screen appears when you access a DSU/CSU that has a password enabled.

Passwd:_ Up Down Done

T o enter a password,

Acquiring/Releasing the User Interface

You can access the user interface from either the front panel, the COM port, the MODEM port (for standalone DSU/CSUs), or the SDCP (for carrier-mounted DSU/CSUs). The DSU/CSU allows only one user interface to be active at a time. The front panel is the default user interface at power-up or after a reset. It is also the default during a software download or when a failure occurs at either the local or remote PC interface.

You can switch an inactive user interface to active if,

• The current active user interface has had no activity

(no key was pressed) for at least five minutes.

• The active user interface has been released with the

Release command.

• The active interface connection is broken. This

includes the call disconnect for a modem interface or the termination of the front panel emulation program on a locally-attached PC (if the PC supports DTR) or the termination of the async terminal interface on a remote or locally-attached terminal.

1. Use the

and keys to position the cursor under the desired character. You must enter a character before the the next space to the right. The

key moves the cursor to

key is not

destructive.

Passwd:

xxxxxxxx

Up Down Done

2. Enter the required password. Press F1 (Up) and F2 (Down) to scroll up and down through the valid characters/numbers for the password. You have five minutes to enter the correct password before the DSU/CSU ends the session.

3. Press F3 (Done) to indicate you are done entering the password. If you enter an invalid password, the message Invalid Password appears.

Acquiring the Active User Interface

T o acquire the active user interface, press any key. If you are using the PC interface, use the mouse to click on the desired Function key.

The top-level menu screen appears on the active user interface, regardless of what screen was displayed at the previous active user interface.

DSU ESF Stat Test Cnfig

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The inactive interface displays the following message when a Function key is pressed or a connection is made on the inactive user interface and control cannot be switched because the currently active interface is in use. On the screen, either Ft. Panel (front panel), Com Port, Modem, or SDCP is displayed in the user interface (User I/F) field.

DSU ESF

User I/F

active

The inactive interface displays the following message after control has been released from the previously active interface and another interface has not become active.

DSU ESF

User I/F

idle

Enabling/Disabling the Front Panel

You can enable or disable the display of information on the front panel. This feature is useful for ensuring that other users do not inadvertently change the device’s configuration options while you are using an external device (e.g., a PC or async terminal). The factory default is Enable.

NOTE

If you disable the front panel, be sure not to alter the configuration options for using an external device (e.g., a PC or async terminal). If this happens, you lose the ability to communicate with the device. You will need to contact your service representative.

T o enable or disable the front panel:

Releasing the Active User Interface

T o release the current active user interface, either allow five minutes to elapse without pressing any key or use the Release command.

T o use the Release command,

1. From the top-level menu screen, press the until the Ctrl selection appears on the screen.

2. Select Ctrl.

3. From the Control screen, select Rel (Release).

Control: Call Rel LED

The active user interface is released. The message Released appears. No user interface is active until input is received from a user interface.

key

1. From the top-level menu screen, select Cnfig.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

3. Select Edit.

4. From the Edit screen, press the

key until the

User selection appears on the screen.

5. Select User.

6. Press F1 (Next) until the FP Access configuration option appears.

7. Press F2 to enable the front panel or F3 to disable the front panel.

FP Access: Next Enab Disab

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Operation

Using the Integral Modem in Standalone DSU/CSUs

The standalone DSU/CSU’s integral modem enables your DSU/CSU to communicate with remote devices to display alarm messages or to function as the user interface. The carrier-mounted DSU/CSU does not

have an integral modem.

The Call command, available from the Control branch of the menu tree, provides the following functions to initiate and terminate modem connections:

• Pass – Initiates a call through the integral modem

to access a far-end DSU/CSU’s front panel from your DSU/CSU’s front panel (or PC attached to the COM port).

• Dial – Initiates a call through the integral modem to

a printer, ASCII terminal, or PC. Sets up a semipermanent connection to route alarm messages to the specified destination.

• Disconnect – Disconnects an active modem

connection.

• Change Directory – Allows entry of phone

numbers into the internal phone directories.

For additional information, refer to the User Interface

Configuration Options section in Appendix C.

Entering Numbers in the Phone Directories

The DSU/CSU has five general directories (1 through 5) and one alarm directory (A). Use the general directories to store phone numbers for remote devices such as standalone DSU/CSUs and ASCII printers. Use the alarm directory to store the phone number of the primary ASCII terminal or printer you use to display or print alarms. This function is not available for carrier-mounted DSU/CSUs because the integral modem is not available for carrier-mounted DSU/CSUs.

T o enter or change numbers in the phone directories,

1. From the top-level menu screen, press the

key

until the Ctrl selection appears on the screen.

2. Select Ctrl.

3. From the Control screen, select Call.

Control: Call Rel LED

4. From the Call Setup screen, select ChDir.

Call Setup: Pass Dial ChDir

The Directory 1 displays first, along with its phone number if one has been entered.

5. Press F1 (Next) to display the next directory (2, in this case). Press F2 (Previous) to display the previous directory (A, in this case). Directories appear in order, 1 through 5 and then A.

1: xxxxxxxxxxxxxxxxx Next Prev Edit

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6. Press F3 (Edit) to change the displayed directory’s phone number (phone numbers can be up to 40 characters). If you select Edit, the Edit screen appears.

1: xxxxxxxxxxxxxxxxx Next Prev Edit

7. Use the and keys to position the cursor under the digit(s) you want to change. Press F1 to scroll up to a higher digit. Press F2 to scroll down to a lower digit. The (default characters) while the

key inserts blanks

key invokes the End Of Number (EON) character which terminates the dial string and erases any characters to the right when you use the Save function.

Valid Phone Number Characters

Table 3-6

See T able 3-6 for the set of valid characters and rules that apply to entering phone numbers.

Example: P9W8135551212

8. Press F3 (Save) to store your changes in nonvolatile memory. If you press

or before saving the phone number you just changed, the previous phone number remains in effect.

1: xxxxxxxxxxxxxxxxx Up Down Save

Valid Characters

0 to 9 DTMF or pulse digits — * # DTMF digits — P Selects Pulse dialing Pulse or Tone must be specified, otherwise

T Selects Tone (DTMF) dialing Tone or Pulse must be specified, otherwise

W Wait for dial tone — B Blind dialing (you need not wait for a dial tone

before entering the dialing sequence)

, Creates a 2-second pause in the dialing

sequence

<space> ( ) - Extra characters for readability. The space is

the default character.

<- End Of Number (EON) character, terminates

the dial string and erases all characters to the right after F3 (Save) is pressed

Meaning Restrictions

Tone is the default. This must be the first character in the string, unless the first character is B. Then, it must immediately follow the B.

To be valid, this must be the first character in the string.

—

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Operation

Initiating a Call for Front Panel Pass-Through Operation

Front panel pass-through initiates a call through the integral modem to access a far-end DSU/CSU’s front panel from your DSU/CSU’s front panel (or PC attached to the COM port).

NOTE

Pass is only available when the FP Pass configuration option has been enabled (see Appendix C,

Configuration Options),

physical interface is either the front panel or the PC, and the integral modem is not already in use.

T o initiate front panel pass-through at the near-end DSU/CSU,

1. From the top-level menu screen, press the key until the Ctrl selection appears on the screen.

2. Select Ctrl.

3. From the Control screen, select Call.

Control: Call Rel LED

the active

5. From the Pass Directory screen, press F1 (Up) to display the next higher numbered directory or press F2 (Down) to select the next lower numbered directory.

Pass n:

xxxxxxxxx

Up Down Dial

6. When the number of the desired directory appears on the screen, press F3 (Dial) to place the call.

Pass n:

xxxxxxxxx

Up Down Dial

Initiating a Call for PC, ASCII Terminal/Printer, or SNMP Operation

Use the Dial command to set up a semipermanent connection to route alarm messages to the specified destination. The Dial command initiates a call through the integral modem to a printer, ASCII terminal, or PC.

T o initiate a call at the local DSU/CSU,

1. From the top-level menu screen, press the until the Ctrl selection appears on the screen.

key

4. From the Call Setup screen, select Pass.

Call Setup: Pass Dial ChDir

2. Select Ctrl.

3. From the Control screen, select Call.

Control: Call Rel LED

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ACCULINK 316x DSU/CSU

4. From the Call Setup screen, select Dial. This selection is not available if the DSU/CSU’s integral modem is already in use.

Call Setup: Pass Dial ChDir

5. From the Dial Directory screen, press F1 (Up) to display the next higher numbered directory or press F2 (Down) to select the next lower numbered directory.

Dial n:

xxxxxxxxx

Up Down Dial

6. When the number of the desired directory appears on the screen, press F3 (Dial) to place the call.

T o disconnect an established modem connection using

the Disconnect command,

1. From the top-level menu screen, press the until the Ctrl selection appears on the screen.

2. Select Ctrl.

3. From the Control screen, select Call.

Control: Call Rel LED

4. From the Call Setup screen, select Disc.

Call Setup: Disc ChDir

key

Dial n:

xxxxxxxxx

Up Down Dial

Disconnecting the Modem Connection

The Disconnect command enables you to force a disconnect of an active modem connection from the front panel of the DSU/CSU. This command is only available when the DSU/CSU modem is connected.

Disconnect methods include:

• Using the Disconnect command via the front panel

menu (for all dial connections, or when a pass-through connection is established to another 316x DSU/CSU).

• Pressing and holding the

keys simultaneously (when a pass-through connection is established to a remote device other than a 316x DSU/CSU).

and front panel

The modem call is disconnected and the Command Complete screen appears.

Disconnect: Command Complete

T o disconnect a modem connection using two front

panel keys,

1. Press the and keys simultaneously and hold for two seconds.

Call Setup: Disc ChDir

The modem call is disconnected and the Command Complete screen appears.

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Operation

Enabling the Communication Port for Carrier-Mounted DSU/CSUs

Communication between the carrier-mounted DSU/CSUs and an external PC, ASCII device, SNMP manager, or async terminal interface (attached either locally or through an external modem) occurs through a shared communication (COM) port. (For COM port cabling information, refer to the COMSPHERE 3000 Series Carrier Installation Manual.) Unlike standalone DSU/CSUs, the carrier-mounted DSU/CSUs do not have a dedicated COM port for external access. Once the COM port is enabled, other COM port configuration options can be selected. These options are used to configure Port 2 on the Auxiliary Backplane as a COM port for the carrier.

NOTE

If a Model 3161 DSU/CSU has the COM port enabled, Port 2 cannot be used as a data port.

T o enable the COM port on the carrier-mounted DSU/CSU,

1. From the top-level menu screen, select Cnfig.

6. Press F1 (Next) until the Com Port configuration option appears.

7. Select Enab to enable the COM port for the carrier-mounted DSU/CSU.

Com Port: Next Enab Disab

The carrier COM port provides the following

functionality:

• If configured for ASCII, only one ASCII device

may be used for the carrier. (If two COM ports are configured for ASCII, neither will work.)

• If configured for Mgmt, each device in the carrier

can support an Mgmt COM port; however, each Mgmt COM port must be connected to a different subnet. T o facilitate IP data routing, the device with the closest link to the SNMP manager or T elnet client should be configured as the IP Bus Master.

• If configured for either ASCII or Mgmt, the carrier

COM port may be configured to control an external device (e.g., modem, x.25 PAD) through the use of AT or user-specified commands.

2. Select the configuration option set to be copied into the Edit area by using the appropriate Function key. Use the scroll keys, if necessary.

3. Select Edit.

4. From the Edit screen, press the

key until the

User selection appears on the screen.

5. Select User.

Edit: Chan Gen User

The set of valid characters for control of the carrier

external COM port device is as follows:

• The numbers: 0–9

• The lowercase letters: a–z

• The uppercase letters: A–Z

• The space (“ ”) character

• The ASCII symbols (in ascending order, based on

the ASCII code)

• The End Of Line (EOL) symbol: ←

• The caret (‘‘^”) control character is used to select

non-printable ASCII characters. The caret ‘‘^” must be followed by one character which together form the control sequence. Table 3-7 defines all of the available control sequences.

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ACCULINK 316x DSU/CSU

Table 3-7

Control Sequences

Sequence

^A or ^a SOH 0x01 ^B or ^b STX 0x02 ^C or ^c ETX 0x03 ^D or ^d EOT 0x04 ^E or ^e ENQ 0x05 ^F or ^f ACK 0x06 ^G or ^g BEL 0x07 ^H or ^h BS 0x08 ^I or ^i HT 0x09 ^J or ^j LF or NL 0x0A ^K or ^k VT 0x0B ^L or ^l FF or NP 0x0C ^M or ^m CR 0x0D ^N or ^n SO 0x0E ^O or ^o SI 0x0F ^P or ^p DLE 0x10

ASCII HEX

^Q or ^q DC1 0x11 ^R or ^r DC2 0x12 ^S or ^s DC3 0x13 ^T or ^t DC4 0x14 ^U or ^u NAK 0x15 ^V or ^v SYN 0x16 ^W or ^w ETB 0x17 ^X or ^x CAN 0x18 ^Y or ^y EM 0x19 ^Z or ^z SUB 0x1A

^{ ESC 0x1B ^\ FS 0x1C ^} GS 0x1D ^^ RS 0x1E ^_

US 0x1F

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Operation

Deactivating the Alarm Relay for Carrier-Mounted DSU/CSUs

The Alarm Cut-off command forces a deactivation of the alarm relay on the 3000 Series Carrier during an alarm condition. Since this function only affects the 3000 Series Carrier, it is only available for carrier-mounted DSU/CSUs. The alarm relay function must first be enabled by the Alarm Relay configuration option (refer to Appendix C, Configuration Options).

T o deactivate the alarm relay,

1. From the top-level menu screen, press the until the Ctrl selection appears on the screen.

2. Select Ctrl.

3. From the Control screen, select ACO.

Control: ACO Rel LED

key

Resetting the DSU/CSU

Use the Reset command to perform a power-on reset of

the DSU/CSU.

T o reset the DSU/CSU,

1. From the top-level menu screen, press the until the Ctrl selection appears on the screen.

2. Select Ctrl.

3. From the Control screen, press the the Reset selection appears on the screen.

4. Select Reset.

Control: ClrReg Reset

5. From the Device Reset screen, press F1 to initiate a reset of the DSU/CSU (the power-up sequence screen appears). Press F2 instead to return to the Control screen without initiating a reset.

key until

key

4. The Command Complete screen appears.

Alarm Cut-Off: Command Complete

Device Reset: Yes No

Download Operations

NOTE

The Download command is for use by service personnel only. Loss of primary data could result from improper use.

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ACCULINK 316x DSU/CSU

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Operation

User Interface Access Security for Standalone DSU/CSUs

NOTE

This page of the manual is selfsupporting and can be removed to prevent unwanted knowledge of the security access levels and their selection.

The user interface access security option allows you to

limit access to the DSU/CSU to display-only and non-intrusive functions. The user access security

function is not available for carrier-mounted DSU/CSUs.

Level 1 (Lvl1) access security allows access to all functions available through the menu tree. This is the default setting.

Level 2 (Lvl2) access security restricts access to only those functions that cannot affect the operation of the DSU/CSU in any way. At this level,

Changing User Interface Access Security

T o change user interface access security,

1. Press the screen.

2. Press the key three times.

3. Press the key once.

key two times from the top-level

DSU ESF Stat Test Cnfig

• None of the functions in the Test or Ctrl branches

are available.

• All functions on the Stat branch are available.

• All functions on the Cnfg branch are available for

display , but they cannot be used to save to a configuration area.

You can only reach the screen that controls security

access using the front panel.

DSU ESF Stat Test Cnfig

The Security screen appears.

Security: Lvl1 Lvl2

4. Press F1 to select Lvl1, or press F2 to select Lvl2. After you make a selection, the top-level screen appears.

If you do not make a selection within 5 minutes, the Automatic Device Health/Status screen appears.

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Maintenance

Overview 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Self-Test Health 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Device Health and Status 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Performance Reports 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Alarms 4-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SNMP Traps 4-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting 4-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Test Jacks 4-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Test Commands 4-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Remote Loopback Tests 4-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sending a Line Loopback Up or Down 4-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sending a V.54/ANSI FT1 Activation/Deactivation 4-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Local Loopback Tests 4-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting a Line Loopback 4-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting a Payload Loopback 4-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting a DTE Loopback 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting a Repeater Loopback 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting a Data Channel Loopback 4-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting a Data Terminal Loopback 4-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Aborting Loopbacks 4-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Test Patterns 4-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sending Test Patterns 4-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Monitoring Test Patterns 4-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Aborting Test Patterns 4-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lamp Test 4-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting a Lamp Test 4-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Aborting a Lamp Test 4-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Displaying DSU/CSU Test Status 4-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview

The DSU/CSU can detect and report faults, and perform diagnostic tests. These features ensure that your DSU/CSU is giving you optimum performance in your network.

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ACCULINK 316x DSU/CSU

Self-Test Health

Use the Self-Test Health command to display the results of the power-up self-test. Possible messages are listed in Table 4-1. See Chapter 2, Installation, for more information about power-up self-test.

T o display power-up self-test results,

1. From the top-level menu screen, select Stat.

DSU ESF Stat Test Cnfig

Self-Test Health Messages

Table 4-1

2. From the Status screen, select STest.

Status: DevHS STest Perf

3. View the results of the last power-up self-test. If no problems were found during power-up, the following message appears.

STest Health: Passed

Message

Passed No problems were found during power-up. CPU fail The central processing unit failed internal testing. Device fail One or more of the unit’s integrated circuit chips failed to pass internal device level testing. B8ZS/LOS fail The unit failed to encode data properly or to detect Loss Of Signal. Alarm fail The unit failed to transmit AIS or to detect an Yellow alarm. Memory fail The unit failed program checksum verification. LCD fail The front panel liquid crystal display (LCD) failed. NET T1 fail The unit failed to internally loop data on the network T1 circuit. DTE T1 fail The unit failed to internally loop data on the DTE T1 (DSX-1) circuit. DSU fail The unit failed to internally loop data on the DSU. DSU Portn fail Port’s integrated circuitry failed to pass device internal testing. Modem fail Unit failed to internally loop data through the modem circuit. Unknown Exp Dev The unit is not able to recognize the expansion device connected to the main circuit card. Failure

xxxxxxxx

An 8-digit hexadecimal failure code is provided for service personnel.

Description

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Maintenance

Device Health and Status

Use the Device Health and Status branch to view the current health and status messages for the DSU/CSU.

T able 4-2 lists these messages in priority order.

T o display device health and status,

1. From the top-level menu screen, select Stat.

2. From the Status screen, select DevHS.

Status: DevHS STest Perf

Alarm/status messages appear on Line 2 of the LCD in priority order (highest to lowest). The DSU/CSU is polled for current status every ten seconds. If the status has changed from the last poll, the Health and Status screen is updated and the highest priority message is displayed.

3. Use the scroll keys, if necessary, to scroll additional device health and status messages onto the LCD.

Device H/S: OOF at DTE

The Auto Device Health and Status screen appears when there is no activity (no keys pressed) on the active physical interface for five minutes. Only the highest priority message appears on Line 2 of the LCD.

Auto Dev H/S OOF at DTE

Table 4-2

(1 of 2)

Health and Status Messages

Message

LOS at Net A Loss Of Signal condition (175 consecutive zeros) has been detected on the network interface.

The condition is cleared when the density of ones to zeros received is 12.5%.

LOS at DTE A Loss Of Signal condition (175 consecutive zeros) has been detected on the DTE Drop/Insert

(DSX-1) interface. The condition is cleared when the density of ones to zeros received is 12.5%.

OOF at Net An Out Of Frame condition (2 out of 4 frame synchronization bits in error) has been detected on

the network interface. The condition is cleared when a reframe occurs.

OOF at DTE An Out Of Frame condition has been detected on the DTE Drop/Insert (DSX-1) interface. The

condition is cleared when a reframe occurs. AIS at Net An Alarm Indication Signal (unframed all ones signal) is being received by the network interface. AIS at DTE An Alarm Indication Signal is being received by the DTE Drop/Insert (DSX-1) interface. EER at Net An Excessive Error Rate condition has been detected on the network interface (the bit error rate

has exceeded the configured threshold for ESF framing). The condition is cleared when the error

rate falls below the threshold value. Yellow at Net A Yellow Alarm signal is being received by the network interface. Yellow at DTE A Yellow Alarm signal is being received by the DTE Drop/Insert (DSX-1) interface.

Description

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Table 4-2

(2 of 2)

Health and Status Messages

Message Description

OOF at Prt

EER at Prt

PORT

Selftest failed A failure was detected during the power-on self-test. Select STest (in the Stat branch) to display

DevFail

Download failed A download attempt was interrupted and failed to complete. The condition is cleared by resetting

Test in progress A test is currently active. Select Tstat (in the Stat branch) to display more test information. Modem Connected The integral modem is currently connected. This message is only displayed for standalone

Master Clk fail The master clock has failed. Timing for the DSU/CSU is provided by the internal clock.

IP Down The IP management link is in a down state for

xxxxxxxx

An Out Of Frame condition has been detected on data port Prtn (where n is the port number). This

condition only occurs if the synchronous data port’s Embedded Data Link (EDL) is enabled (only

available for 2-port and 4-port DSU/CSUs).

The error rate of the received signal has exceeded the configured threshold for data port Prt

(where n is the port number). This condition only occurs if the synchronous data port’s Embedded

Data Link (EDL) is enabled (only available for 2-port and 4-port DSU/CSUs). The condition is

cleared when the error rate falls below the synchronous data port’s configured threshold value.

This condition occurs if the

management system and the DSU/CSU is not currently possible for this port. For the AUX port, this

condition is detected only when a device reset or power-up occurs.

more information about the failure.

An internal error has been detected by the operating software. An 8-digit code appears for use by

service personnel. The condition is cleared by resetting the device.

the device.

DSU/CSUs.

PORT

is configured for Mgmt, and communication between the

PORT

(where

PORT

is COM, MODEM, or AUX).

DSU Operational This message only appears if there are no valid alarm or status messages.

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Maintenance

Performance Reports

When the network interface is configured for ESF operation, network performance is continuously monitored and maintained in two sets of aggregate registers: Carrier Network Interface Registers (T elco) and User Network Interface Registers (User). The User registers contain an extra status register (Status Event). Registers shown on the front panel LCD are listed in

T able 4-3. These registers are status registers that collect

performance data for the previous 24-hour period. Performance data is updated in 15-minute intervals. After 15 minutes, the current interval is rolled over into a set of accumulator registers that represent the previous 96 15-minute intervals for the register. An interval total of how many of the 96 registers contain valid data is also kept, as well as a 24-hour total for each accumulator register.

For 2-port and 4-port DSU/CSUs, port performance is continuously monitored and maintained in memory registers when the port is configured to use EDL. The DSU/CSU maintains two sets of port registers for each synchronous data port: far-end port registers and near-end port registers. These registers are status registers that collect performance data for the previous 8-hour period. Port data is updated in 15-minute intervals. After 15 minutes, the current interval is rolled over into a set of accumulator registers that represent the previous 32 15-minute intervals for the register. An interval total of how many of the 32 registers contain valid data is also kept, as well as a 8-hour total for each accumulator register.

T o display User Network Interface (User) performance,

1. From the top-level menu screen, select Stat.

2. From the Status screen, select Perf.

Status: DevHS STest Perf

3. Select User registers.

Performance: Telco User Prt1

4. From the User Registers screen, press F1 to view current registers (go to Step 5), press F2 to view 24-Hour T otals (go to Step 6), or press F3 to view 15-Minute Interval Registers (go to Step 7).

User Registers: Cur 24Tot Intvl

NOTE

The following procedure is an example only. Screen displays

may vary depending on the model and configuration of the DSU/CSU. The procedures for

displaying Telco and port registers are similar to this example.

5. When you press F1 from the User Registers screen, the User registers for the current 15-minute interval appear.

User Current:

xx,xxx

Event =

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ACCULINK 316x DSU/CSU

6. When you press F2 from the User Registers screen, the User registers for the 24-hour total interval appear.

User 24 Hour: VldIntvl =

7. When you press F3 from the User Registers screen, the interval screen appears. Use this screen to choose the specific 15-minute interval.

User Intvl: 01 Up Down Dsply

8. Use the and keys to position the cursor under the first or second digit in the interval number displayed, then use the F1 (Up) and F2 (Down) keys to increment/ decrement the number.

T o clear the performance registers,

1. From the top-level menu screen, press the key until the Ctrl selection appears on the screen.

2. Select Ctrl.

3. From the Control screen, press the

key until

the ClrReg selection appears on the screen.

4. Select ClrReg.

Control: Rel LED ClrReg

5. From the Clear Prf Regs screen, press F1 to clear the User registers.

Clear Prf Regs: User Prt1 Prt2

9. When you have selected the number of the interval you want to display, press F3 (Dsply) to display the registers for the interval selected. Use the scroll keys to view additional register information.

User Intvl: ES=

xxx

You can reset the performance registers via the ClrReg

command in the Control branch of the front panel menu.

If you selected User, the User performance registers are cleared, all accumulators are reset to zero, and all status registers are cleared. The current interval timer, the number of valid intervals count, and the total 24-hour counts are reset to zero. The Command Complete message then appears.

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Table 4-3

(1 of 2)

Performance Registers

Maintenance

Event ESF error events counter. An error event is an

ESF frame with either a Cyclic Redundancy Check (CRC) error or an Out Of Frame (OOF) event. The maximum count is 65,535. This register is only reset as a result of a reset command from the network. This register is valid for the current interval only .

CurTimer Current interval timer. This register records the

number of seconds in the current 15-minute interval. The maximum is 900 seconds. This register is valid for the current interval only .

VldIntvl N/A V alid interval total. Records the number of valid

ES The number of errored seconds for the current

interval. An errored second is any second with one or more ESF error events. The maximum is 900 seconds.

UAS The number of unavailable seconds for the

current interval. An unavailable second is any one second interval when service is unavailable. (Detection occurs with 10 consecutive unavailable seconds.) The maximum is 900 seconds.

N/A

15-minute intervals in the previous is 24 hours for aggregate performance and 8 hours for port performance. This register is not valid for the current interval.

The total number of errored seconds for the previous

hours, where x is 24 hours for aggregate

performance and 8 hours for port performance.

The total number of unavailable seconds for the previous x hours, where x is 24 hours for aggregate performance and 8 hours for port performance.

hours, where

SES The number of severely errored seconds for the

current interval. A severely errored second is any second with 320 or more CRC errors, or any second with one or more OOF events. The maximum is 900 seconds.

BES The number of bursty errored seconds for the

current interval. A bursty errored second is any second with more than one, but less than 320, CRC errors. The maximum is 900 seconds.

LOFC The loss of frame count for the current interval.

This is a count of the number of times that an LOF is declared. The maximum count is 255.

CSS

(Not valid for Port registers.)

The number of controlled slip seconds for the current interval.

The total number of severely errored seconds for the previous performance and 8 hours for port performance.

The total number of bursty errored seconds for the

previous x hours, where x is 24 hours for aggregate

performance and 8 hours for port performance.

The total loss of frame count for the previous hours, where x is 24 hours for aggregate performance and 8 hours for port performance.

The total number of controlled slip seconds for the previous x hours, where x is 24 hours for aggregate performance and 8 hours for port performance.

hours, where x is 24 hours for aggregate

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ACCULINK 316x DSU/CSU

Table 4-3

(2 of 2)

Performance Registers

StEvnt

(Only valid for User registers.)

Complete

(Only valid for far-end port registers.)

The status events register records whether one or more of the following events have occurred at least once during the interval. The event is identified by a letter as follows:

Y – A Yellow Alarm signal has been received

on the network interface.

L – Loss Of Signal has occurred on the DTE

Drop/Insert (DSX-1) interface.

E – The Excessive Error Rate threshold has

been exceeded.

F – A Frame Synchronization Bit Error has

been detected. V – A Bipolar Violation has been detected. If none of these events occurred during the

interval, StEvnt=none will be displayed. Bad line conditions or loopback tests may

prevent far-end port statistics from reaching the DSU/CSU. This field indicates whether the 15-minute interval contains 900 seconds of statistics. If one or more seconds of far-end statistics are missing, this field will display Complete=No, otherwise it will display Complete=Yes. This field is only displayed

when Far is selected from the Prt

screen.

N/A

4-8 January 1997 3160-A2-GB21-50

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Maintenance

Alarms

For standalone DSU/CSUs, you can route these alarms to the MODEM port, the COM port, or both. For carrier-mounted DSU/CSUs, you can route them to the COM port or dial them out using an external device.

Each alarm message contains a customer identification to indicate which remote DSU/CSU is reporting an alarm. For information about customer identification, refer to the

Displaying Unit Identity section in Chapter 3, Operation.

Possible alarm messages are as follows:

• Continuous Loss Of Signal detected at the x

Interface (where x is either Network or DTE).

• Alarm Cleared. Loss Of Signal condition at the x

Interface (where x is either Network or DTE).

• Continuous Out Of Frame condition detected at

the x Interface (where x is either Network or

DTE).

• Alarm Cleared. Out Of Frame condition at the x

Interface (where x is either Network or DTE).

• Alarm Indication Signal received at the x

Interface (where x is either Network or DTE).

• Continuous Out Of Frame condition detected at

synchronous data port n (where n is the port

number).

• Alarm Cleared. Out Of Frame condition at

synchronous data port n (where n is the port

number).

• An Excessive Error Rate has been detected at

synchronous data port n (where n is the port

number).

• Alarm Cleared. An Excessive Error Rate at

synchronous data port n (where n is the port

number).

If two alarm conditions are detected at once, the higher priority alarm is reported. However, if an even higher priority alarm is detected before the first alarm is cleared, the later alarm is not reported. (The alarms listed above are in priority order with the highest priority listed first.)

Alarms remain active until the alarm condition is cleared. Also, an alarm clear message is only sent when there are no other alarms active.

For information about alarm configuration options, refer to the Alarm Configuration Options section in Appendix C, Configuration Options.

For troubleshooting information, refer to the

Troubleshooting section on page 4-11.

• Alarm Cleared. Alarm Indication Signal at the x

Interface (where x is either Network or DTE).

• An Excessive Error Rate has been detected at

the Network Interface.

• Alarm Cleared. An Excessive Error Rate at the

Network Interface.

• Yellow Alarm signal received at the x Interface

(where x is either Network or DTE).

• Alarm Cleared. Yellow Alarm signal at the x

Interface (where x is either Network or DTE).

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ACCULINK 316x DSU/CSU

SNMP Traps

SNMP traps are unsolicited messages that are sent from the DSU/CSU to an SNMP manager when the DSU/CSU detects certain pre-specified conditions. These traps enable the SNMP manager to monitor the state of the network.

Trap types consist of the following:

• General traps – include warmStart and

authenticationFailure. The DSU/CSU sends a warmStart trap after it has been reset to indicate that it has just reinitialized itself. The DSU/CSU sends an authenticationFailure trap when it has received an SNMP protocol message that has not been properly authenticated. These traps are set by the Gen Trap configuration option.

• Enterprise Specific traps – signify that the

DSU/CSU has recognized an enterprise-specific event. See T able 4-4 for enterprise-specific traps. These traps are set by the Entp Trap configuration option.

• Link Traps – identify the condition of the

communications interface, either linkDown (one of the communications interfaces has failed) or linkUp (one of the communications interfaces has just come up). These traps are set by the Link Trap configuration option. The communications interfaces for which these traps can be generated are specified by the Trap I/F configuration option.

T able 4-5 defines traps for each interface.

Table 4-4

Enterprise-Specific Trap Definitions

Trap Value

enterpriseClockFail(1) The currently configured

master clock source has failed.

enterpriseSelfTestFail(2) A DSU/CSU hardware

failure is detected at self-test. This trap is generated after DSU/CSU initialization.

enterpriseDeviceFail(3) An internal DSU/CSU

failure is detected by the

operating software. enterpriseTestStart(5) A test is initiated. enterpriseConfigChange(6) A configuration option is

changed. enterpriseTestClear(105) A test is concluded.

Event

Table 4-5

SNMP Trap per Interface

Interface

T1 Network Up = No alarm or test

DTE Drop/Insert (DSX-1) Up = No alarm or test

Trap Meaning

conditions.

Down = Alarm or test

conditions.

conditions, and the

interface is enabled.

Down = Alarm or test

conditions, or the interface

is disabled. Synchronous Data Ports Up = No test conditions,

the port is assigned to a

network interface, and both

CTS and DSR are ON.

Down = Test conditions,

the port is unassigned, or

either CTS or DSR is off.

4-10 January 1997 3160-A2-GB21-50

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Maintenance

Troubleshooting

The DSU/CSU is designed to provide you with trouble-free service. However, Table 4-6 gives you some direction if a problem occurs.

Table 4-6

(1 of 2)

Troubleshooting

Symptom

No power 1. The power module is not securely attached.

2. The wall receptacle has no power.

Power-Up Self-Test fails

Message LOS at NET appears

The DSU/CSU has detected an internal hardware failure.

1. Network cable problem.

2. No signal is being transmitted at the far-end.

3. Facility problem.

Possible Cause Solutions

For problems other than those listed in the table, please

contact your service representative.

1. Check the power module attachment.

2. Check the wall receptacle power by plugging in some equipment that is known to be working.

Contact your service representative.

1. Check that the network cable is securely attached at both ends.

2. Check the far-end status.

3. Contact your facility provider.

Message LOS at DTE appears

Message OOF at Net appears

Message OOF at DTE appears

Message

Yellow at Net

appears

Message

Yellow at DTE

appears

Message AIS at Net appears

1. DTE Drop/Insert (DSX-1) cable problem.

2. No signal being transmitted from the DTE.

1. Incompatible framing format between the network and the DSU/CSU.

2. Network cabling problem.

3. Facility problem.

1. Incompatible framing format between the Drop/Insert port on the customer premises equipment and the DSU/CSU.

2. DTE Drop/Insert (DSX-1) cabling problem.

1. Network cable problem.

2. Far-end device has lost framing sync on the line.

3. Facility problem.

DTE has detected an LOS or LOF condition. 1. Check the status of the DTE.

1. Upstream device is transmitting an AIS.

2. The network is transmitting an AIS.

1. Check that the DTE Drop/Insert (DSX-1) cable is securely attached at both ends.

2. Check the DTE status.

1. Check that the framing format for the network interface is correct.

2. Check that the network cable is securely attached at both ends.

3. Contact your facility provider.

1. Check that the framing format for the DTE Drop/Insert (DSX-1) interface is correct.

2. Check that the DTE Drop/Insert (DSX-1) cable is securely attached at both ends.

1. Check that your network cable is securely attached at both ends.

2. Check the status of the far-end device.

3. Contact your facility provider.

2. Check that the DTE Drop/Insert (DSX-1) cable is securely attached at both ends.

1. Check the status of the upstream device(s).

2. Contact your facility provider.

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ACCULINK 316x DSU/CSU

Symptom SolutionsPossible Cause

Table 4-6

(2 of 2)

Troubleshooting

Message AIS at DTE appears

Message EER at Net appears

BPV LED is ON 1. Incompatible line coding format between the

A failure message appears followed by an 8-digit code

x x x x x x x x

( Mgmt link is down 1. The manager configuration is mismatched with

No SNMP communication via the AUX port

Invalid Number The modem cannot dial because the phone

DTE is sending an AIS. Check the DTE.

Facility problem. Contact your facility provider.

DTE and the DSU/CSU.

2. DTE Drop/Insert (DSX-1) cable problem.

Internal DSU/CSU problem. Record the 8-digit code, then contact your

)

the DSU/CSU configuration.

2. The manager’s link layer protocol is not running.

1. Cable problem.

2. The link layer protocol is not running.

number is invalid or there is no number in the selected directory.

1. Check that the line coding format for the DTE Drop/Insert (DSX-1) interface is correct.

2. Check that the DTE cable is securely attached at both ends.

service representative.

1. Check that the configurations are matched.

2. Start the link layer protocol.

1. Check that the cable is securely attached at both ends.

2. Change the Aux Use configuration option to None, and then back to SNMP or Daisy (as appropriate).

Check that the selected phone number is correct.

No Dial Tone The modem cannot dial because there is no dial

tone. Busy Signal The modem is receiving a busy signal. Redial the phone number later. No Answer Tone The remote end does not answer within

45 seconds. Modem In Use The modem is in use. Redial the phone number later.

4-12 January 1997 3160-A2-GB21-50

Check that the modem is connected properly .

Redial the phone number later.

Page 88

Maintenance

Test Jacks

For 2-port and 4-port DSU/CSUs, six test jacks are located on the front panel (Figure 4-1). The Mon (Monitor) branch of the menu tree allows you to select either EQPT (Equipment) or NET (Network).

NOTE

The single-port DSU/CSU provides only Network Monitor In and Network Monitor Out test jacks. There is no Mon (Monitor) selection in the menu tree.

The 2-port and 4-port DSU/CSU test jack functions are shown in Figure 4-2 and described in T able 4-7.

NET MON EQPT

OutInOutInOut

496-1480

Figure 4-1. Test Jacks (Standalone DSU/CSU)

T o change the Mon (Monitor) selection in 2-port and

4-port DSU/CSUs,

1. From the top-level menu, press the key until the Ctrl selection appears on the screen.

2. Select Ctrl.

3. From the Control screen, press the

key until

the Mon selection appears on the screen.

4. Select Mon.

Control: Passwd Mon

5. From the Mon Jack screen, press F1 to select EQPT (the default), or press F2 to select NET.

Mon Jack: EQPT EQPT NET

TERMINAL

EQUIPMENT

(DTE)

EQPT

NET

Out

EQPT

Out

MON

Mon Jack: EQPT Mon Jack: NET

(Selectable)

LINE

RECEIVER

Mon Jack: EQPT Mon Jack: NET

NET

INTERNAL

CIRCUITRY

(Selectable)

MON

Out

Figure 4-2. Test Jack Block Diagram

LINE

RECEIVER

NETWORK

496-14875

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ACCULINK 316x DSU/CSU

Table 4-7

Test Jack Functions

Test Jack Name

NET In

(Network In)

NET Out

(Network Out)

EQPT In

(Equipment In)

EQPT Out

(Equipment Out)

MON In

(Monitor In)

MON Out

(Monitor Out)

Function

A break-in test jack that allows a signal to be inserted toward the network by external test equipment.

A break-in test jack that interrupts the signal coming from the network and allows it to be terminated by the external test equipment.

A break-in test jack that allows a signal to be inserted toward the terminal equipment (DTE) by external test equipment.

A break-in test jack that interrupts the signal coming from the terminal equipment (DTE) and allows it to be terminated by the external test equipment.

A monitor jack that is controlled by the Mon (Monitor) branch of the menu tree. If it is set to EQPT (the default), this jack monitors the signal going into the terminal equipment (DTE). If it is set to NET, this jack monitors the signal going into the network.

A monitor jack that is controlled by the Mon (Monitor) branch of the menu tree. If it is set to EQPT (the default), this jack monitors the signal coming from the terminal equipment (DTE). If it is set to NET, this jack monitors the signal coming from the network.

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Maintenance

Test Commands

The test commands enable you to run loopbacks and test patterns on the DSU/CSU, and to test the front panel LEDs. These tests can help you isolate areas of trouble if you are having problems with your DSU/CSU.

T o access all Test commands from the Test branch, press F2 to select T est from the top-level menu screen.

DSU ESF Stat Test Cnfig

Remote Loopback Tests

The Remote Loopback tests enable you to troubleshoot your circuit by sending the following to a far-end device:

For Networks

• Line loopback up activation sequence for

10 seconds (LLBUP)

NOTE

The following procedures are examples only. Screen displays

may vary depending on the model and configuration of the DSU/CSU.

Sending a Line Loopback Up or Down

T o send a Line Loopback Up or Down sequence on the

network to a far-end DSU/CSU,

1. From the top-level menu screen, select Test.

2. From the Test screen, select Rlpbk.

Test: Rlpbk Lpbk Ptrns

• Line loopback down activation sequence for

10 seconds (LLBDN)

For Channels

• V.54 activation sequence to initiate a V.54 Loop 2

(54UP)

• V.54 deactivation sequence to terminate a V.54

Loop (54DN)

• ANSI T1.403 (Annex B) activation sequence to

initiate a DCLB on the remote device (FT1UP)

• ANSI T1.403 (Annex B) deactivation sequence to

terminate a DCLB on the remote device (FT1DN)

You cannot perform remote loopbacks if any of the local loopbacks are active. If you attempt to do so, the error message Invld Test Combo (Invalid Test Combination) appears.

3. From the Rem Loopback screen, press F1 to select LLBUP (Line Loopback Up), or press F2 to select LLBDN (Line Loopback Down).

Rem Loopback: LLBUP LLBDN 54UP

The Line Loopback sequence is sent up or downstream to the far-end DSU/CSU for 10 seconds. During this time, Sending appears on Line 2 of the LCD, followed by Command Complete when 10 seconds have elapsed.

You can press any function key to restore the Rem Loopback screen without affecting transmission of the loopback code.

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ACCULINK 316x DSU/CSU

Sending a V.54/ANSI FT1 Activation/Deactivation

T o send a V.54 or ANSI FT1 Activation or

Deactivation loopback sequence to the far-end DSU/CSU,

1. From the top-level menu screen, select Test.

2. From the Test screen, select Rlpbk.

Test: Rlpbk Lpbk Ptrns

3. From the Rem Loopback screen, press the function key that corresponds to the specific loopback test you want to perform. Use the scroll keys, if necessary.

Rem Loopback: LLBUP LLBDN 54UP

The Rem Loop screen appears.

Rem Loop:

Type

Prt1 Prt2 Prt3

The 54UP, 54DN, FT1UP, and FT1DN commands send the requested sequence out the network interface on the DS0 channels allocated to the port you select here.

4. From the Rem Loop screen, press the desired function key to select the specific port. Use the scroll keys, if necessary.

After you select a port, the sequence is sent to the far-end DSU/CSU. During this time, Sending appears on Line 2 of the LCD, followed by Command Complete when the sequence is complete.

During the Sending message, you can press the

and keys without affecting transmission

of the loopback sequence.

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Maintenance

Local Loopback Tests

The Local Loopback tests enable you to conduct circuit testing and fault isolation for the digital line. The supported local loopback tests are:

• Line Loopback (LLB)

• Payload Loopback (PLB)

• DTE Loopback (DLB)

• Repeater Loopback (RLB)

• Data Channel Loopback (DCLB)

• Data Terminal Loopback (DTLB)

NOTE

DLB does not appear when the DTE Drop/Insert (DSX-1) interface is disabled.

The Line Loopback command can be activated and deactivated in response to commands received over the network interface. The Network Interface configuration option NET LLB controls whether the DSU/CSU responds to the commands transmitted on the network interface to initiate LLBs (see Appendix C, Configuration

Options).

The data port configuration option NET DCLB controls whether the DSU/CSU responds to inband V.54 commands to initiate DCLB for that port (see Appendix C, Configuration Options).

Local loopback tests can be aborted (Abort Command) at any time.

No more than two local loopbacks can be active at any one time. An additional restriction prohibits certain loopbacks from running at the same time. Valid loopback combinations listed in T able 4-8 are identified by YES.

Table 4-8

Valid Loopback Combinations

LLB PLB DLB RLB DCLB DTLB

LLB N/A NO YES YES NO YES PLB NO N/A YES NO NO YES DLB YES YES N/A NO YES YES RLB YES NO NO N/A NO YES

DCLB NO NO YES NO YES

(on separate

ports)

DTLB YES YES YES YES YES

(on separate

ports)

YES

(on separate

ports)

YES

(on separate

ports)

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ACCULINK 316x DSU/CSU

Starting a Line Loopback

The Line Loopback command (LLB) loops the received signal on the network interface back to the network without change.

CSUDSU

DTE

(DSX-1)

ALL 1s

PORT 1PORT 2

T o perform a Line loopback,

1. From the top-level menu screen, select Test.

2. From the Test screen, select Lpbk.

Test: Rlpbk Lpbk Ptrns

LLB

INTERFACE

NETWORK

496-14319-02

Starting a Payload Loopback

The Payload Loopback command (PLB) loops the received signal on the network interface back to the network. The signal is looped back as close to the DTE Drop/Insert (DSX-1) port as possible (after it has passed through the framing circuitry of the DSU/CSU). Framing CRCs and BPVs are corrected.

CSUDSU

DTE

(DSX-1)

ALL 1s

PORT 1PORT 2

T o perform a Payload loopback,

1. From the top-level menu screen, select Test.

2. From the Test screen, select Lpbk.

PLB

INTERFACE

NETWORK

496-14316-02

3. From the Loopback screen, select LLB.

Loopback: Abort LLB PLB

Test Started appears on Line 2. If a line loopback is already in progress, the Already Active message appears. If an invalid combination of loopbacks is in progress, the error message Invld Test Combo appears (see Table 4-8 for valid loopback test combinations).

Test: Rlpbk Lpbk Ptrns

3. From the Loopback screen, select PLB.

Loopback: Abort LLB PLB

Test Started appears on Line 2. If a Payload loopback is already in progress, the Already Active message appears. If an invalid combination of loopbacks is in progress, the error message Invld Test Combo appears (see Table 4-8 for valid loopback test combinations).

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Maintenance

Starting a DTE Loopback

The DTE Loopback command (DLB) loops the received signal on the DTE Drop/Insert (DSX-1) port back to the DTE without change.

CSUDSU

DTE

(DSX-1)

DLB

ALL 1s

PORT 1PORT 2

T o perform a DTE loopback,

1. From the top-level menu screen, select Test.

2. From the Test screen, select Lpbk.

Test: Rlpbk Lpbk Ptrns

NETWORK

INTERFACE

496-14317-02

Starting a Repeater Loopback

The Repeater Loopback command (RLB) loops the signal being sent to the network back to the DTE Drop/Insert (DSX-1) and data ports. The signal is looped back as close to the network interface as possible (after it has passed through the framing circuitry of the DSU/CSU). Framing CRCs and BPVs are corrected.

CSUDSU

DTE

(DSX-1)

PORT 1 PORT 2

RLB

T o perform a Repeater loopback,

1. From the top-level menu screen, select Test.

2. From the Test screen, select Lpbk.

NETWORK

INTERFACE

ALL 1s

496-14318-02

3. From the Loopback screen, press the key until the DLB selection appears on the screen.

4. Select DLB.

Loopback: LLB PLB DLB

Test Started appears on Line 2. If a DTE loopback is already in progress, the Already Active message appears. If an invalid combination of loopbacks is in progress, the error message Invld Test Combo appears (see Table 4-8 for valid loopback test combinations).

Test: Rlpbk Lpbk Ptrns

3. From the Loopback screen, press the key until the RLB selection appears on the screen.

4. Select RLB.

Loopback: PLB DLB RLB

Test Started appears on Line 2. If a Repeater loopback is already in progress, the Already Active message appears. If an invalid combination of loopbacks is in progress, the error message Invld Test Combo appears (see Table4-8 for valid loopback test combinations).

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ACCULINK 316x DSU/CSU

Starting a Data Channel Loopback

The Data Channel Loopback command (DCLB) loops the data received from the network interface, for all DS0 channels allocated to the selected port, back to the network. The loopback occurs after the data passes through the port circuitry but before it is sent out the data port.

CSUDSU

DTE

(DSX-1)

DCLBDCLB

ALL 1sALL 1s

PORT 1PORT 2

T o perform a Data Channel loopback,

1. From the top-level menu screen, select Test.

2. From the Test screen, select Lpbk.

NETWORK

INTERFACE

496-14315-02

5. From the DCLB screen, press the Function key for the port for which you want to perform the data channel loopback. Use the scroll keys, if necessary.

Loopback: DCLB Prt1 Prt2 Prt3

Test Started appears on Line 2. If a Data Channel loopback is already in progress, the Already Active message appears. If an invalid combination of loopbacks is in progress, the error message Invld Test Combo appears (see Table 4-8 for valid loopback test combinations).

Starting a Data Terminal Loopback

The Data T erminal Loopback command (DTLB) loops the data received from the selected port, for all DS0 channels allocated to the port, back out of the port. This loopback occurs after the data passes through the port circuitry but before it reaches the T1 framer.

Test: Rlpbk Lpbk Ptrns

3. From the Loopback screen, press the key until the DCLB selection appears on the screen.

4. Select DCLB.

Loopback: DLB RLB DCLB

CSUDSU

DTE

(DSX-1)

DTLBDTLB

PORT 1PORT 2

ALL 1s

INTERFACE

T o perform a Data Terminal loopback,

1. From the top-level menu screen, select Test.

2. From the Test screen, select Lpbk.

Test: Rlpbk Lpbk Ptrns

NETWORK

496-14314-02

4-20 January 1997 3160-A2-GB21-50

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Maintenance

3. From the Loopback screen, press the key until the DTLB selection appears on the screen.

4. Select DTLB.

Loopback: RLB DCLB DTLB

5. From the DTLB screen, press the Function key for the port for which you want to perform the data terminal loopback. Use the scroll keys, if necessary.

Loopback: DTLB Prt1 Prt2 Prt3

Test Started appears on Line 2. If a Data T erminal loopback is already in progress, the Already Active message appears. If an invalid combination of loopbacks is in progress, the error message Invld Test Combo appears (see

T able 4-8 for valid loopback test combinations).

3. From the Loopback screen, select Abort.

Loopback: Abort LLB PLB

4. From the Loopback Abort screen, press the desired Function key to abort All or one specific loopback test. Use the scroll keys, if necessary.

Loopback: Abort All LLB PLB

If you select ALL, LLB, PLB, DLB, or RLB, skip Step 5.

5. From the Abort screen, press the Function key that corresponds to the port for which you want to abort the test. Use the scroll keys, if necessary.

Abort:

Test Name

Prt1 Prt2 Prt3

Aborting Loopbacks

The Abort Loopback command stops all loopback tests or any selected loopback test currently active on the DSU/CSU.

T o abort one or more loopback tests,

1. From the top-level menu screen, select Test.

2. From the Test screen, select Lpbk.

Test: Rlpbk Lpbk Ptrns

When abort is complete, the message Command Complete appears on the Abort screen.

NOTE

If you mistakenly choose to abort a loopback test that is not currently running, a Command Complete message will still display and the loopback that is currently active will still be running. Use the TStat branch to view the test status to determine if the abort was successful.

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ACCULINK 316x DSU/CSU

Test Patterns

Use the Test Pattern commands to send, monitor, and abort test patterns. A vailable test patterns are:

• QRSS – A quasi-random signal source

approximating live data that can be monitored for logic errors (on the network and the data ports).

• 1-in-8 – A test pattern consisting of a one (1)

followed by seven zeros (on the network only).

• 511 – A pseudo-random bit sequence (PRBS) that is

511 bits long (on the data ports only). This is a PRBS 2

Sending Test Patterns

Use the Send command to start transmission of a test pattern.

Only one test pattern can be active at a time on one port. Table 4-9 lists the valid send test pattern combinations. Valid combinations are identified by YES.

T o send a test pattern,

–1 test.

4. From the Patterns Send screen, press F1 to send a QRSS pattern, F2 to send a 1-in-8 pattern, F3 to send a 511 pattern.

Patterns: Send QRSS 1in8 511

If you send a 1-in-8 pattern, skip Step 5.

5. From the Send screen, press the Function key that corresponds to network or the port for which you want to send a test pattern. Use the scroll keys, if necessary. (NET does not appear for the 511 pattern.)

Send:

Name

NET Prt1 Prt2

1. From the top-level menu screen, select Test.

2. From the Test screen, select Ptrns.

Test: Rlpbk Lpbk Ptrns

3. From the Patterns screen, select Send.

Patterns: Abort Send Mon

The Test Started screen appears.

Send:

Name and Dest

Test Started

If the DSU/CSU is already sending the test pattern you selected, the message Already active appears. If you selected an incompatible test pattern combination, the message Invld Test Combo appears. See Table 4-9 for valid combinations.

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Table 4-9

Valid Send Test Pattern Combinations

QRSS (Network) QRSS (Port) 1-in-8 (Network) 511 (Port)

QRSS (Network) N/A NO NO NO

Maintenance

QRSS (Port) NO YES (on

separate ports)

1 in 8 (Network) NO NO N/A NO

511 (Port) NO N/A N/A YES (on

Monitoring Test Patterns

4. From the Patterns Mon screen, press F1 for QRSS

N/A YES (on

or F2 for 511.

Use the Monitor command to monitor a QRSS test pattern over all the channels on the network interface, or to monitor QRSS or 511 test patterns on the channels allocated to an individual port.

Patterns: Mon QRSS 511

This command provides the number of errors detected in the test pattern (5 digits, maximum 99999).

T o monitor a QRSS or 511 test pattern,

1. From the top-level menu screen, select Test.

5. From the Monitor screen, press the Function key that corresponds to network or the port for which

2. From the Test screen, select Ptrns.

you want to send a test pattern. Use the scroll keys, if necessary. (NET does not appear for the 511 pattern.)

Test: Rlpbk Lpbk Ptrns

Monitor:

Name

NET Prt1 Prt2

separate ports)

3. From the Patterns screen, select Mon.

Patterns: Abort Send Mon

The Monitor screen appears with the error count. If the maximum of 99999 is exceeded, OvrFlw appears instead of the count. If the receiver loses synchronization while the monitor is active, No

Sync appears.

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ACCULINK 316x DSU/CSU

Aborting Test Patterns

Use the Abort command to stop all test patterns or any

selected test pattern active on the DSU/CSU.

T o abort test patterns,

1. From the top-level menu screen, select Test.

2. From the Test screen, select Ptrns.

Test: Rlpbk Lpbk Ptrns

3. From the Patterns screen, select Abort.

Patterns: Abort Send Mon

NOTE

If you mistakenly choose to abort a test pattern that is not currently running, a Command Complete message still displays and the test pattern currently active still runs. Use the TStat branch to view the test status to determine if the abort was successful.

5. From the Abort screen, press the Function key that corresponds to the network or port for which you want to abort a test pattern. Use the scroll keys, if necessary.

Abort:

Send or Mon

NET Prt1 Prt2

The DSU/CSU terminates the selected test pattern and displays the message Command Complete.

4. From the Patterns Abort screen, press the desired Function key to abort either All active test patterns, active Send test patterns, or the active Monitor (Mon) test pattern.

Patterns: Abort All Send Mon

If you select All, the DSU/CSU terminates all active test patterns and displays the message

Command Complete. Skip Step 5.

4-24 January 1997 3160-A2-GB21-50

Page 100

Maintenance

Lamp Test

Use the Lamp Test commands to start and stop a test of

the DSU/CSU front panel LCD and LEDs.

Starting a Lamp Test

T o start a Lamp test,

1. From the top-level menu screen, select Test.

2. From the Test screen, press the Lamp selection appears on the screen.

3. From the Test screen, select Lamp.

Test: Lpbk Ptrns Lamp

key until the

6. When you are satisfied that all LEDs are lighting and the LCD is functioning properly, abort the Lamp test from the Lamp T est screen. If there is no activity on the DSU/CSU front panel for five minutes, the Device Health and Status screen appears automatically. However, the Lamp test remains active until it is aborted.

Aborting a Lamp Test

T o abort the Lamp test,

1. Display the Lamp Test screen. To do this when the LCD is alternating the Lamp test screens, press any Function key. Otherwise, follow Steps 1 through 3 for starting a Lamp test.

Lamp Test: Abort Start

4. From the Lamp Test screen, select Start.

Lamp Test: Abort Start

5. The following screens alternately appear on the LCD until you press a Function key to return to the Lamp T est screen. In addition, all LEDs blink.

F1 F2

0123456789 : ; < = > ? @ABCDEFGHIJKLMNO

2. From the Lamp Test screen, select Abort.

Lamp Test: Abort Start

4-253160-A2-GB21-50 January 1997

Paradyne 3160-A2-GB21-50 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Warranty, Sales, and Service Information

Important Safety Instructions

Table of Contents

Preface

Introduction

Installation

Operation

Maintenance