Paradyne Acculink 3160 DSU, Acculink 3164 DSU, Acculink 3161 DSU, Acculink 3165 DSU, Acculink 3160 CSU Operator's Manual

ACCULINK



3160, 3161, 3164, AND 3165

DSU/CSU

OPERATOR’S GUIDE

Document No. 3160-A2-GB21-80

March 1999

Copyright  1999 Paradyne Corporation.
All rights reserved.
Printed in U.S.A.

Notice

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 Ave. N., Largo, FL 33773.

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.

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

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, Service, and Training Information

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

 Internet: Visit the Paradyne World Wide Web site at www.paradyne.com. (Be sure to register your warranty

there. Select

 Telephone: Call our automated system to receive current information by fax or to speak with a company

representative.

— Within the U.S.A., call 1-800-870-2221
— Outside the U.S.A., call 1-727-530-2340

Service & Support → Warranty Registration

.)

Document Feedback

We welcome your comments and suggestions about this document. Please mail them to Technical Publications,
Paradyne Corporation, 8545 126th Ave. N., Largo, FL 33773, or send e-mail to [e-mail]. Include
the number and title of this document in your correspondence. Please include your name and phone number if you
are willing to provide additional clarification.

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

A

March 1999

3160-A2-GB21-80

Important Information

!

Important Safety Instructions

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

2. This product (when not powered by the optional direct feed cable) is intended to be used with a 3-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 3-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. To 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.

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 are 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. 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.

10. 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.

3160-A2-GB21-70 March 1999

B

Important Information

Direct Feed Power Supply Warning

!

WARNING:

When energizing this product with the supplied direct feed power cable, connect only to a SEL V (Safety
Extra Low V oltage) power source with a maximum available output of less than 240 VA. Power
configurations which utilize the direct feed cable to energize the equipment must only be installed by a
qualified electrician in restricted area access locations in accordance with articles 110-16, 110-17, and
110-18 of the National Electric Code (NEC), and articles 2-308, 2-310, 2-312, 2-314, 2-200, and 2-202 of the
Canadian Electric Code (CEC).

A readily accessible disconnect device as part of the building installation shall be incorporated in fixed
wiring. The disconnect device (a 24 or 48 Vdc, 15 or 20 A circuit breaker or switch) must be included in
the ungrounded supply conductor. Over current protection must be a 24 or 48 Vdc, 15 or 20 A fuse or
circuit breaker.

EMI Warnings

!

WARNING:

This equipment has been tested and found to comply 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 to the equipment unless the changes or modifications are expressly approved by Paradyne
Corporation.

!

WARNING:

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 règlement sur le matérial

brouilleur du Canada.

C

March 1999

3160-A2-GB21-80

Important Information

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 standalone 3160, 3164, or 3165 DSU/CSU, and on the 3161 DSU/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 Telephone Company. The DSU/CSU can be configured to support any of the
following framing format and line signaling techniques. The DSU/CSU’s configuration must correspond to the T1
line’s parameters. The standalone 3160, 3164, or 3165 DSU/CSU’s internal modem connects to the Public
Switched Telephone 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 3161
DSU/CSU connects to the T1 network using the multi-line USOC-type RJ48H jack and does not have a PSTN
interface.

316x DSU/CSU Facility Interface Codes

Code Description

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

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). To 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.

4. If the 316x DSU/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.

3160-A2-GB21-70 March 1999

D

Important Information

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

— Outside the U.S.A., call 1-727-530-2340

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.

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.

E

March 1999

3160-A2-GB21-80

Contents

About This Guide

 Document Purpose and Intended Audience vii. . . . . . . . . . . . . . . . . . . . . . . . .

 Document Summary vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Product-Related Documents viii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Reference Documents ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Introduction

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

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

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

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 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

2 Installation

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

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

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

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

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

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

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

3160-A2-GB21-80

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. . . . . . . . . . . . . . . . .

March 1999

i

Contents

3 Operation

 Overview 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Using the Front Panel 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LCD 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

LEDs 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Displaying Unit Identity 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Setting Customer Identification 3-1 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Selecting the DTE Drop/Insert or Data Port for LED Display 3-12. . . . . . . . . .

 Displaying LED Conditions 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Changing Configuration Options 3-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Displaying/Editing Configuration Options 3-16. . . . . . . . . . . . . . . . . . . . . . .

Saving Edit Changes 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting/Copying to a Specific Port 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . .

 Configuring the DSU/CSU for SNMP or Telnet Access 3-19. . . . . . . . . . . . . . .

Selecting the Port 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Setting the IP Address 3-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting the Link Layer Protocol 3-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Specifying the Community Name(s) and Access Type(s) 3-24. . . . . . . . . .

 Configuring SNMP Traps 3-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Enabling SNMP Trap Messages 3-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting the Number of Trap Managers 3-27. . . . . . . . . . . . . . . . . . . . . . . .

Configuring a Destination for SNMP Traps 3-28. . . . . . . . . . . . . . . . . . . . . .

 Configuring DS0 Channels 3-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Displaying DS0 Channel Assignments 3-36. . . . . . . . . . . . . . . . . . . . . . . . .

Allocating Data Ports 3-38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Block or ACAMI Assignment Method 3-40. . . . . . . . . . . . . . . . . . . . . . . . . . .

Individual Channel Assignment Method 3-41. . . . . . . . . . . . . . . . . . . . . . . .

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

Network Interface 3-42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Clearing DS0 Channel Allocation 3-44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Providing Backup Capability 3-45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Selecting the Timing Source 3-45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring for Network Timing 3-47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring for External Timing 3-47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Establishing Access Security on a Port 3-48. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Setting a Password 3-49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Entering a Password to Gain Access 3-50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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3160-A2-GB21-80

Contents

 Acquiring/Releasing the User Interface 3-51. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Acquiring the Active User Interface 3-52. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Releasing the Active User Interface 3-53. . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Enabling/Disabling the Front Panel 3-54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Using the Integral Modem in Standalone DSU/CSUs 3-55. . . . . . . . . . . . . . . . .

Entering Numbers in the Phone Directories 3-55. . . . . . . . . . . . . . . . . . . . .

Initiating a Call for Front Panel Pass-Through Operation 3-57. . . . . . . . . .

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

SNMP Operation 3-59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Disconnecting the Modem Connection 3-60. . . . . . . . . . . . . . . . . . . . . . . . .

 Enabling the Communication Port for Carrier-Mounted DSU/CSUs 3-61. . . .

 Deactivating the Alarm Relay for Carrier-Mounted DSU/CSUs 3-64. . . . . . . .

 Resetting the DSU/CSU 3-65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Download Operations 3-65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 User Interface Access Security for Standalone DSU/CSUs 3-67. . . . . . . . . . .

Changing User Interface Access Security 3-68. . . . . . . . . . . . . . . . . . . . . . .

4 Maintenance

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

 Self-Test Health 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

 Alarms 4-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 SNMP Traps 4-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Troubleshooting 4-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Test Jacks 4-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Test Commands 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Remote Loopback Tests 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Local Loopback Tests 4-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sending a Line Loopback Up or Down 4-20. . . . . . . . . . . . . . . . . . . . . . . . .

Sending a V.54/ANSI FT1 Activation/Deactivation 4-21. . . . . . . . . . . . . . . .

Starting a Line Loopback 4-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting a Payload Loopback 4-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting a DTE Loopback 4-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting a Repeater Loopback 4-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting a Data Channel Loopback 4-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting a Data Terminal Loopback 4-28. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Aborting Loopbacks 4-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Contents

 Test Patterns 4-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sending Test Patterns 4-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Monitoring Test Patterns 4-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Aborting Test Patterns 4-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Lamp Test 4-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Starting a Lamp Test 4-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Aborting a Lamp Test 4-36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Displaying DSU/CSU Test Status 4-37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A Front Panel Menu

B Technical Specifications

 Overview B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C Configuration Options

 Overview C-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 DTE Interface Configuration Options C-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Port Configuration Options C-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Network Interface Configuration Options C-8. . . . . . . . . . . . . . . . . . . . . . . . . . .

 Channel Configuration Options C-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 General Configuration Options C-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 User Interface Configuration Options C-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Alarm Configuration Options C-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Management Configuration Options C-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Configuration Worksheets C-41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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D Pin Assignments

 Overview D-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 T1 Network Interface D-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 DTE Drop/Insert Interface D-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 MODEM Port Interface D-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 AUX Port Interface D-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 COM Port Interface D-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 EIA-530-A Port Interface Connector D-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 EIA-530-A-to-RS-449 Cable Interface D-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 EIA-530-A-to-V.35 Cable Interface D-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 EIA-530-A-to-X.21 Cable Interface D-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Serial Crossover Cable D-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Power Input Connector D-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Optional DC Power Cable D-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 External Clock Interface D-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents

E SNMP MIB Objects

 Overview E-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 MIB II (RFC 1213) E-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

System Group, MIB II E-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Interface Group, MIB II E-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

IP Group, MIB II E-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ICMP Group, MIB II E-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TCP Group, MIB II E-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

UDP Group, MIB II E-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transmission Group, MIB II E-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SNMP Group, MIB II E-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 DS1/E1 MIB (RFC 1406) E-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Near End Group, DS1/E1 MIB E-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Far End Group, DS1/E1 MIB E-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DS1 Fractional Group, DS1/E1 MIB E-19. . . . . . . . . . . . . . . . . . . . . . . . . . . .

 RS-232-like MIB (RFC 1317) E-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General Port Table, RS-232-like MIB E-20. . . . . . . . . . . . . . . . . . . . . . . . . . .

Asynchronous Port Table, RS-232-like MIB E-22. . . . . . . . . . . . . . . . . . . . .

Synchronous Port Table, RS-232-like MIB E-23. . . . . . . . . . . . . . . . . . . . . .

Input Signal Table, RS-232-like MIB E-23. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output Signal Table, RS-232-like MIB E-24. . . . . . . . . . . . . . . . . . . . . . . . . .

 Generic-Interface MIB Extensions (RFC 1229) E-24. . . . . . . . . . . . . . . . . . . . . .

Generic Interface Test Table, Generic Interface MIB E-25. . . . . . . . . . . . . .

 Enterprise MIB E-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Correlation between Menu Commands and SNMP Objects E-28. . . . . . . . . . .

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F IP Network Addressing Scenarios

 Overview F-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Scenario 1 F-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Scenario 2 F-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Scenario 3 F-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Scenario 4 F-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Scenario 5 F-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

G Front Panel Emulation

 Overview G-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Installing Front Panel Emulation Software G-1. . . . . . . . . . . . . . . . . . . . . . . . . .

 Starting Front Panel Emulation G-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

H Asynchronous Terminal Operation

 Overview H-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Before Using the Asynchronous Terminal H-1. . . . . . . . . . . . . . . . . . . . . . . . . . .

 Initiating an Asynchronous Terminal Session H-2. . . . . . . . . . . . . . . . . . . . . . . .

 Ending an Asynchronous Terminal Session H-3. . . . . . . . . . . . . . . . . . . . . . . . .

 Menu Organization H-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Using Asynchronous Terminal Screens H-5. . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Setting Customer Identification H-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Displaying LED Conditions H-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Changing Configuration Options H-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Establishing Access Security on a Port H-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Setting a Password H-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Entering a Password to Gain Access H-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Configuration Worksheets for the Asynchronous Terminal Interface H-15. . . .

I Equipment List

Displaying or Editing Configuration Options H-9. . . . . . . . . . . . . . . . . . . . .

Saving Edit Changes H-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Glossary

Index

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3160-A2-GB21-80

About This Guide

Document Purpose and Intended Audience

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 designed for installers and users of DSU/CSUs familiar with the operation of
digital data communication equipment.

Document Summary

Section Description

Chapter 1

Chapter 2

Chapter 3

Chapter 4

Appendix A

Appendix B

Appendix C

Introduction.

features.

Installation.

units and make connections. (Instructions for the
carrier-mounted 3161 DSU/CSU are contained in the

ACCULINK 3151 CSU and 3161 DSU/CSU General
Information Guide

Operation.

panel, changing configuration options, establishing
security, and using the internal modem.

Maintenance.

testing, and troubleshooting.

Front Panel Menu

the main front panel functions.

Technical Specifications

specifications for the 316x DSU/CSUs.

Configuration Options.

options and default settings.

Describes the 316x DSU/CSUs and their

Describes how to install the standalone

, Document No. 3100-A2-GK40.)

Provides instructions for using the front

Contains procedures for monitoring,

. Contains a menu tree showing all

. Contains technical

Contains all the configuration

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vii

About This Guide

Section Description

Appendix D

Appendix E

Appendix F

Appendix G

Appendix H

Appendix I

Glossary Defines abbreviations and terms used in this

Index Lists key terms, concepts, and sections in alphabetical

Product-Related Documents

Pin Assignments

connectors and cables.

SNMP MIB Objects

supported by the DSU/CSUs.

Network Addressing Scenarios

addressing schemes.

Front Panel Emulation

emulation software in lieu of the front panel.

Async Terminal Operation

VT100-compatible terminal to configure and control the
unit.

Equipment List

other related parts.

document.

order.

. Shows the pin assignments for

. Describes the MIB objects

. Provides sample IP

. Explains how to use front panel

. Explains how to use a

. Contains order numbers for cables and

Document Number Document Title

3000-A2-GA31

3000-A2-GB41

3100-A2-GK40

3162-A2-GB20
3163-A2-GB20
3166-A2-GB20

Contact your sales or service representative to order additional product
documentation.

Paradyne documents are also available on the World Wide Web at
www.paradyne.com. Select

COMSPHERE 3000 Series Carrier Installation
Manual

COMSPHERE –48 VDC Central Office Power Unit
Installation Guide

ACCULINK 3151 CSU and 3161 DSU/CSU General
Information Guide

ACCULINK 3162 DSU/CSU User’s Guide
ACCULINK 3163 DSU/CSU User’s Guide
ACCULINK 3166 DSU/CSU User’s Guide

Library → Technical Manuals.

viii

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3160-A2-GB21-80

Reference Documents

 AT&T Technical Reference 54016
 AT&T Technical Reference 62411
 ANSI T1.403-1989
 Industry Canada CS-03
 CSA-22.2 No. 950
 Industry Canada (ICES)-003
 FCC Part 15
 FCC Part 68
 UL 1950



Management Information Base for Network Management of TCP/IP-Based
Internets: MIBII



Definitions of Managed Objects for the DS1 and E1 Interface Types

RFC 1406, January 1993

About This Guide

. RFC 1213, March 1991

.



Definitions of Managed Objects for RS-232-like Hardware Devices

RFC 1317, April 1992



Extensions to the Generic-Interface MIB

. RFC 1229, May 1991

.

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ix

About This Guide

This page intentionally left blank.

x

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3160-A2-GB21-80

Introduction

Overview

1

The ACCULINKR 316x DSU/CSU acts as an interface between the T1 digital
network and the customer premises equipment, converting signals received from
the DTE (Data Terminal 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.

Features

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
COMSPHERE 3000 Series Carrier Installation Manual

The DSU/CSU optimizes network performance with a wide range of features such
as the following:

H Software configuration menu displayed via a liquid crystal display (LCD) to

permit quick and easy operation, and elimination of complicated hardware
strapping.

H Local or remote configuration and operation flexibility.
H Several loopback capabilities and test pattern generators.
H DTE Drop/Insert (DSX-1) capability.
H Alarm message display/print capability.
H Front panel emulation via Windows-based Front Panel Emulation software.

.

and the

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1-1

Introduction

 Integral modem for standalone DSU/CSUs.
 Asynchronous (async) terminal interface support.
 Telnet access for remote async terminal operations.
 Network management provided through industry-standard Simple Network

Management Protocol (SNMP).

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 Telnet access. Telnet
is a Transmission Control Protocol/Internet Protocol (TCP/IP) service that
supports a virtual terminal interface.

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3160-A2-GB21-80

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). To 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.

Two 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).

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
COMSPHERE 3000 Series Carrier Installation Manual

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)
 Twelve 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.

and the

.

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1-3

Introduction

ACCULINK

MON EQPT

NET

3160

In

OutInOutInOut

OK

Figure 1-1. 3160 DSU/CSU Front Panel

LCD

F1 F2 F3

FAIL TEST SIG OOF ALRM

NETWORK RXD

EER SIG ALRM PDVOOF BPV

DTR TXD CTS RTS

496-14936

ACCULINK

MON EQPT

NET

3164

In

OutInOutInOut

OK

Figure 1-2. 3164 DSU/CSU Front Panel

LCD

F1 F2 F3

FAIL TEST SIG OOF ALRM

NETWORK RXD

EER SIG ALRM PDVOOF BPV

DTR TXD CTS RTS

496-14937

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3160-A2-GB21-80

ACCULINK

NET

MON

3165

In

Out

OK

Figure 1-3. 3165 DSU/CSU Front Panel

LCD

F1 F2 F3

FAIL TEST SIG OOF ALRM

NETWORK

EER

DTR TXD CTS RTS

RXD

PORT

Introduction

495-14567-01

Standalone DSU/CSU Rear Panel

The standalone DSU/CSU rear panel contains the connectors required for the
operation of the DSU/CSU (Figures 1-4, 1-5, and 1-6). The connectors and their
functions are listed in Table 1-1.

POWER

Figure 1-4. 3160 DSU/CSU Rear Panel

PORT 2

PORT 1

AUX

COM DSX-1MODEM

EXT CLK

NET

99-16234

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1-5

Introduction

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

POWER

PORT 1

COM PORT MODEM

DTE

NETWORK

PORT 4PORT 3

PORT 2PORT 1CLOCK IN

494-14564

NETWORK

NEC

CLASS 2

INPUT

CAUTION:

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

Figure 1-6. 3165 DSU/CSU Rear Panel

495-14565-01

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3160-A2-GB21-80

Introduction

Table 1-1. Standalone DSU/CSU Rear Panel Connectors

Name Function

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.
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)
PORTs 1–4 Used to connect the customer’s synchronous data DTE to

Used to attach an external clock to the DSU/CSU.

the DSU/CSU.

3160-A2-GB21-80

March 1999

1-7

Introduction

This page intentionally left blank.

1-8

March 1999

3160-A2-GB21-80

Installation

Overview

2

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

ACCULINK 3151 CSU and 3161 DSU/CSU General Information Guide

the

COMSPHERE 3000 Series Carrier Installation Manual

.

and

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 (PORTs 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).

3160-A2-GB21-80

March 1999

2-1

Installation

NETWORK

LAN

ROUTER

DSU/CSU

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

PBX

DSU/CSU

LAN

ROUTER

Figure 2-2. Shared Access Application Example

DSU/CSU

NETWORK
SERVICES

LAN

ROUTER

496-15003-01

496-15004-01

LAN

ROUTER

LAN

ROUTER

Figure 2-3. Fractional T1 Application Example

2-2

DSU/CSU

DSU/CSU

FRACTIONAL

March 1999

LAN

ROUTER

NETWORK

DSU/CSU

LAN

ROUTER

496-15005-01

3160-A2-GB21-80

SNMP or Telnet Connection Examples

The DSU/CSU can be connected to an SNMP or Telnet system in a number of
ways. Some examples include:

 Directly connecting the COM port to the SNMP or Telnet 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).

 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.

Installation

ETHERNET

PPP/SLIP

Figure 2-4. Direct Connection

ETHERNET

LAN

ROUTER

LAN

ROUTER

PPP/SLIP

DSU/CSU

P

ara

dyn

e

DSU/CSU

NETWORK

496-15006-01

NETWORK

496-15007-01

Figure 2-5. Connection through a Router

3160-A2-GB21-80

March 1999

2-3

Installation

LAN

ROUTERETHERNET

LAN

ADAPTER

PPP

Figure 2-6. Connection through a LAN Adapter

PPP

LAN

ETHERNET

ROUTER

PPP

DSU/CSU

NETWORK

496-15008-01

DSU/CSU

DSU/CSU

NETWORK

DSU/CSU

LAN

ADAPTER

Figure 2-7. LAN Adapter and Daisy Chaining

DSU/CSUDSU/CSU

NETWORK

FDL/EDL

PPP

Figure 2-8. Remote Access through FDL/EDL

PPP

ADAPTER

LAN

ROUTER

LAN

496-15009-01

ETHERNET

496-15010-01

2-4

March 1999

3160-A2-GB21-80

Important Instructions

Read and follow all warning notices and instructions marked on the DSU/CSU or
included in this guide.

Installation

For a complete listing of the safety instructions, see
at the beginning of this guide.

!

HANDLING PRECAUTIONS FOR
STATIC-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

496-15104

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 SELV (Safety Extra
Low Voltage) 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). To use dc power, choose one of
the following power supply types.

Important Safety Instructions

Installing the +24 Vdc Power Supply

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

 Procedure

To install the +24 Vdc power supply:

1. Connect the green wire to a suitable ground.

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

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

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

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

3160-A2-GB21-80

March 1999

2-5

Installation

DSU/CSU POWER

PLUG

1
2
3
4
5
6

BLACK

RED

GREEN

WHITE

ORANGE

BLUE

Figure 2-9. +24 Vdc Power Supply Pinouts

Installing the Single –48 Vdc Power Supply

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

TO CUSTOMER-SUPPLIED BATTERY

X
X

GROUND
+24 VDC RETURN
+24 VDC SOURCE

X

99-14298-02

 Procedure

To install the –48 Vdc single source power supply:

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

2. Connect the green wire to a suitable 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.

DSU/CSU POWER

PLUG

1
2
3
4
5
6

BLACK

RED

GREEN

WHITE

ORANGE

BLUE

TO CUSTOMER-SUPPLIED BATTERY

–48 VDC RETURN

GROUND

X

–48 VDC INPUT

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

2-6

March 1999

99-14299-02

3160-A2-GB21-80

Installing the Redundant –48 Vdc Power Supply

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

 Procedure

To 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.

3. Connect the green wire to a suitable 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.

Installation

DSU/CSU POWER

PLUG

1
2
3
4
5
6

BLACK

RED

GREEN

WHITE

ORANGE

BLUE

TO CUSTOMER-SUPPLIED BATTERY

–48 VDC RETURN B
–48 VDC RETURN A
GROUND

X

–48 VDC INPUT B
–48 VDC INPUT A

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

99-14300-02

3160-A2-GB21-80

March 1999

2-7

Installation

Cabling Examples

The DSU/CSU is supplied with an ac power module and a VF cable for the
integral modem.

TERMINAL

COM

PORT

PORT 2

POWER

PORT 1

Optional cables are described in Appendix D,
Figure 2-12 illustrates some cabling examples.

MODEM

MODEM

PORT

AUX

COM DSX-1MODEM

EXT CLK

NETWORK

PORT

DSU/CSU

NET

PSTN

3160

Pin Assignments

MODEM

MODEM

PORT

NETWORK

PORT

.

OR
OR

MANAGER

3164 DSU/CSU

PC

SNMP

FRONT

PANEL

2-8

POWER

SERIAL

PORT

T1 OR SERIAL CONNECTIONS
DIAL CONNECTIONS

Figure 2-12. Cabling Examples

T1 NETWORK

POWER

SNMP

MANAGER

March 1999

3164

DSU/CSU

COM PORT

POWER

AUX PORT

NEC

CLASS 2

CAUTION:

INPUT

OR

NETWORK

PORT

COM PORT MODEM

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

NETWORK

DTE

PORT 4PORT 3

PORT 2PORT 1CLOCK IN

TO

ROUTER

OR

TERMINAL

99-16250

3160-A2-GB21-80

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-Test 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

Installation

).

Fail LED blinks ON and Off continuously.

Self-Test:
In Progress

F1

F2

F3

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

F1

F2

F3

3160-A2-GB21-80

March 1999

2-9

Installation

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-Test Health command to display the status of this
test (see

Self-Test Health

in Chapter 4,

Maintenance

).

Self-Test:
Failed

xxxxxxxx

F1

F2

F3

4. The top-level menu screen appears.

DSU ESF
Stat Test Cnfig

F1

F2

F3

2-10

March 1999

3160-A2-GB21-80

Operation

Overview

3

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

ACCULINK 3151 CSU and 3161 DSU/CSU General Information Guide

the

COMSPHERE 3000 Series Carrier Installation Manual

.

and

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

Installation Manual

NOTE:

You can display a graphical representation of the DSU/CSU front panel on an
attached PC (see Appendix G,

COMSPHERE 3000 Series Carrier

.

Front Panel Emulation

).

3160-A2-GB21-80

March 1999

3-1

Operation

ACCULINK

MON EQPT

NET

3160

In

OutInOutInOut

OK

FAIL TEST SIG OOF ALRM

Figure 3-1. Standalone DSU/CSU Front Panel

LCD

F1 F2 F3

EER SIG ALRM PDVOOF BPV

NETWORK RXD

DTR TXD CTS RTS

496-14936

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,

F1 F2

F3

Front Panel Menu

)

Figure 3-2. LCD

The LCD displays status messages as requested via the Device Health and
Status branch of the front panel menu (see
Chapter 4,

Maintenance

). In addition, the highest level status message appears

Device Health and Status

in

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.

3-2

March 1999

3160-A2-GB21-80

Keypad

Operation

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

F3

Figure 3-3. Keypad

Use the key to move up the menu.

F1 F2

F3

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

).

F3

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.

3160-A2-GB21-80

F1 F2

F3

March 1999

3-3

Operation

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.

Test Jacks

For data entry screens, the

key scrolls one character to the left while

the key scrolls one character to the right.
For menu screens, the key scrolls to the previous menu choice while

the key scrolls to the next menu choice.

F1 F2

F3

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.

Test jacks are located on the DSU/CSU front panel (Figure 3-4). These are
described in

Test Jacks

in Chapter 4,

Maintenance

. (The 3165 provides only the

Network Monitor In and Network Monitor Out test jacks.)

NET MON EQPT

In

OutInOutInOut

496-14808

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

3-4

March 1999

3160-A2-GB21-80

LEDs

Operation

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
on page 3-12 to choose which port’s status the LEDs display.

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

NOTE:

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

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 (Table 3-2)
 DTE Drop/Insert (DSX-1) Interface (Table 3-3)
 Data Ports (Table 3-4)

3160-A2-GB21-80

March 1999

3-5

Operation

Table 3-1. System LEDs

Name Color Meaning

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

ON:
OFF:

BLINKING:
FAST BLINK:

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

ON:

OFF:
BLINKING

TEST Yellow A system test is in progress.

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 (1 of 2)

Name

SIG Green Monitors the signal being received from the network.

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

Color Meaning

ON:

OFF:

network signal.

ON

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

OFF:

A recoverable signal is being received from the
network.

The signal cannot be recovered from the network (a
Loss of Signal condition exists).

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

sampling period.

3-6

March 1999

3160-A2-GB21-80

Operation

Table 3-2. Network Interface LEDs (2 of 2)

Name MeaningColor

ALRM Yellow Indicates whether an alarm condition exists on the received

network signal.

ON:

OFF:

EER Yellow Indicates the Excessive Error Rate (EER) has been exceeded

on the network interface.

ON:
OFF:

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.

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

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

interface.

NOTE:

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

Table 3-3. DTE Drop/Insert (DSX-1) Interface LEDs (1 of 2)

Name Color Meaning

SIG Green Monitors the signal being received from the DTE Drop/Insert

(DSX-1) interface.

ON:

OFF:

OOF Yellow Monitors Out Of Frame (OOF) conditions on the received DTE

Drop/Insert (DSX-1) signal.

ON:

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.

3160-A2-GB21-80

March 1999

3-7

Operation

Table 3-3. DTE Drop/Insert (DSX-1) Interface LEDs (2 of 2)

Name MeaningColor

ALRM Yellow Indicates whether an alarm condition exists on the received DTE

Drop/Insert (DSX-1) signal.

ON:

OFF:

PDV Yellow Monitors Pulse Density Violations (PDV) on the received DTE

Drop/Insert (DSX-1) signal.

ON

OFF:

BPV Yellow Monitors Bipolar Violations (BPV) on the received DTE

Drop/Insert (DSX-1) signal.

ON:

OFF:

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.

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

received DTE 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.

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.

Table 3-4. Data Port LEDs (1 of 2)

Name Color Meaning

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

Data Terminal Ready received from the synchronous data DTE.

ON:
OFF:

TXD Yellow Monitors activity on interchange circuit BA (CCITT 103) –

Transmitted Data. This is the data sent from the synchronous
data DTE to the data port on the DSU/CSU.

ON:

OFF:

CYCLING:

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.

3-8

March 1999

3160-A2-GB21-80

Operation

Table 3-4. Data Port LEDs (2 of 2)

Name MeaningColor

RXD Yellow Monitors activity on interchange circuit BB (CCITT 104) –

Received Data. This is data sent to the synchronous data DTE
from the data port on the DSU/CSU.

ON:
OFF:
CYCLING:

CTS Yellow Monitors the state of interchange circuit CB (CCITT 106) –

Clear-to-Send sent to the synchronous data DTE.

ON:
OFF:

RTS Yellow Monitors the state of interchange circuit CA (CCITT 105) –

Request-to-Send received from the synchronous data DTE.

ON:
OFF:

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

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,

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

 Procedure

To display the DSU/CSU’s identity (ID):

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

DSU ESF
Stat Test Cnfig

F1

F2

F3

Front Panel Menu

).

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

3160-A2-GB21-80

March 1999

3-9

Operation

3. Select ID.

Status:
TStat LED ID

F1

F2

F3

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

key.

Identity:
Ser=

xxxxxxx

F1

F2

F3

Identity:
Mod=

xxxx-xx-xxx

F1

F2

F3

Identity:
Cust ID=

F1

xxxxxxxx

F2

F3

3-10

Identity:
SRev=

F1

Identity:
CCA1=

F1

Identity:
CCA2=

F1

xx.xx.xx

F2

xxxx-xxx

F2

xxxx-xxx

F2

March 1999

F3

F3

F3

3160-A2-GB21-80

Setting Customer Identification

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

 Procedure

To change the customer identification (CID):

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

2. Select Ctrl.

Operation

3. From the Control screen, press the

key until the CID selection appears

on the screen.

4. Select CID.

Control:
Reset CID Passwd

F1

F2

F3

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

F1

F2

F3

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.

3160-A2-GB21-80

March 1999

3-11

Operation

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.

 Procedure

To select a port for LED display:

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 LED.

Control:
Call Rel LED

F1

F2

F3

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

LED Dsply: DTE
DTE Prt1 Prt2

F1

F2

F3

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.

3-12

March 1999

3160-A2-GB21-80

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,
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.

 Procedure

To display LED conditions on the front panel screen:

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

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

Front Panel Emulation

Operation

). When using Front

3. From the Status screen, select LED.

Status:
Perf TStat LED

F1

F2

F3

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

F1

F2

F3

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

3160-A2-GB21-80

F1

F2

March 1999

F3

3-13

Operation

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

F1

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

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.

F2

F3

3-14

 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.

 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.

March 1999

3160-A2-GB21-80

Operation

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

).

3160-A2-GB21-80

March 1999

3-15

Operation

Displaying/Editing Configuration Options

Procedure



To display/edit configuration options:

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

DSU ESF
Stat Test Cnfig

F1

F2

F3

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

F1

F2

F3

3. Select Edit.

Choose Funct:
Edit Save

F1

F2

F3

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.)

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. To reach other options, use the Next and Previous
selections to scroll forward and backward through the group of options.

3-16

Edit:
DTE Port NET

F1

F2

March 1999

F3

3160-A2-GB21-80

NET Framing: ESF
Next D4 ESF

Operation

Saving Edit Changes

 Procedure

F1

F2

F3

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.

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.

To 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

F1

F2

F3

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

F1

F2

F3

3160-A2-GB21-80

March 1999

3-17

Operation

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.

 Procedure

To 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.

Edit:
DTE Port NET

F1

F2

F3

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,

Options

).

Configuration

Port Select:
Copy Prt1 Prt2

F1

F2

F3

3-18

March 1999

3160-A2-GB21-80

" Procedure

To copy the configuration options to one or all ports:

1. From the Port Select screen, select Copy.

Port Select:
Copy Prt1 Prt2

Operation

F1

2. Select the port

F2

from

which you want to copy the configuration options using

F3

the corresponding Function key.

Copy From:
Prt1 Prt2 Prt3

F1

F2

F3

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.

Copy To:
All Prt1 Prt2

F1

F2

F3

Configuring the DSU/CSU for SNMP or Telnet
Access

To configure the DSU/CSU for SNMP or Telnet access:

H Enable the SNMP agent or Telnet server within the DSU/CSU (see

Appendix C,

H Select and configure the port that provides the link to the SNMP or Telnet

system.

H Set the Internet Protocol (IP) address and subnet mask needed to access the

DSU/CSU (see Appendix F,

H Select the link layer protocol (PPP or SLIP) for the port that provides the link

to the SNMP or Telnet system.

H For SNMP links, specify the two community names (and their access levels)

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

3160-A2-GB21-80

Configuration Options

IP Network Addressing Scenarios

March 1999

).

).

3-19

Operation

Selecting the Port

H For SNMP links, configure the device to send traps to the SNMP manager, if

desired.

H Specify the Telnet password or SNMP validation options, if desired (see

Appendix C,

Configuration Options

).

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 Token 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.

The example shown below assumes that the COM port is being used as the link
to the SNMP or Telnet system.

" Procedure

To 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
the screen.

5. Select User.

Edit:
Chan Gen User

F1

F2

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

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

key until the User selection appears on

F3

3-20

Com Use:
Next Mgmt ASCII

F1

F2

March 1999

F3

3160-A2-GB21-80

Setting the IP Address

 Procedure

Operation

The IP address is the address used by the SNMP or Telnet 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 Telnet 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.

To 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.

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

F1

F2

F3

6. From the Mgmt Config screen, select Gen.

Mgmt Config:
Gen Trap

F1

F2

F3

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.

3160-A2-GB21-80

March 1999

3-21

Operation

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

F1

F2

F3

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.

000.000.000.000
Up Down Save

F1

F2

F3

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.

010.155.111.222
Up Down Save

F1

F2

F3

3-22

March 1999

3160-A2-GB21-80

Selecting the Link Layer Protocol

Two 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:

H Full negotiation of PPP’s Link Control Protocol (LCP).
H Active negotiation of LCP when the connection is established.
H Maximum Request Unit (MRU) sizes up to 1500 bytes, but the DSU/CSU will

attempt to negotiate down to 500 bytes.

Operation

H The DSU/CSU provides a unique LCP magic number derived from the unit

serial number and the elapsed time.

H Full negotiation of escape characters.

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

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

Selecting the Port

on page 3-20. This example

" Procedure

To 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
the screen.

key until the Mgmt selection appears on

3160-A2-GB21-80

March 1999

3-23

Operation

5. Select Mgmt.

Edit:
User Alarm Mgmt

F1

F2

F3

6. From the Mgmt Config screen, select Gen.

Mgmt Config:
Gen Trap

F1

F2

F3

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

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

Com Link:
Next PPP SLIP

F1

F2

F3

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.

 Procedure

To 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
the screen.

key until the Mgmt selection appears on

3-24

March 1999

3160-A2-GB21-80

5. Select Mgmt.

Edit:
User Alarm Mgmt

Operation

F1

F2

F3

6. From the Mgmt Config screen, select Gen.

Mgmt Config:
Gen Trap

F1

F2

F3

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

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

CommunityName1:
Next Edit Clear

F1

F2

F3

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.

3160-A2-GB21-80

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

F1

F2

F3

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.

March 1999

3-25

Operation

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.

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,

Traps

in Chapter 4,

Enabling SNMP Trap Messages

F1

F2

Maintenance

F3

Configuration Options,

and

SNMP

.



Procedure

To 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.

4. From the Edit screen, press the

key until the Alarm selection appears on

the screen.

5. Select Alarm.

Edit:
User Alarm Mgmt

F1

F2

F3

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

3-26

March 1999

3160-A2-GB21-80

Operation

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

SNMP Trap:
Next Enab Disab

F1

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.

 Procedure

To 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.

3. Select Edit.

4. From the Edit screen, press the
the screen.

5. Select Mgmt.

Edit:
User Alarm Mgmt

F2

F3

key until the Mgmt selection appears on

3160-A2-GB21-80

F1

F2

F3

6. From the Mgmt Config screen, select Trap.

Mgmt Config:
Gen Trap

F1

F2

F3

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 Mgrs:1
Next 1 2

F1

F2

March 1999

F3

3-27

Operation

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.

 Procedure

To 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.

5. Select Mgmt.

Edit:
User Alarm Mgmt

F1

F2

F3

6. From the Mgmt Config screen, select Trap.

Mgmt Config:
Gen Trap

F1

F2

F3

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

Setting the IP Address

on page 3-21 for more information on setting an IP

000.000.000.000

. Refer to

address.

9. Press F1 (Next) until the Trap
the destination for the SNMP trap by using the appropriate Function key. Use
the scroll keys, if necessary.

3-28

n

Destination configuration appears, and select

Trapn Dst:
Next None Com

F1

F2

March 1999

F3

3160-A2-GB21-80

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.

To 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.

Operation

Blank configuration worksheets are provided at the back of Appendix C,

Configuration Options

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
examples in Figure 3-7 and Figure 3-8.

2. Complete the Robbed Bit Signaling (RBS) information worksheet as shown in
the examples in Figure 3-9.

3. Using the worksheets shown in Figures 3-10 and 3-11, circle the
configuration options needed to implement the logical channel configuration.

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

Allocating Data Ports

. To complete the configuration worksheets for DS0 channel

on page 3-38.

3160-A2-GB21-80

March 1999

3-29

Operation

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

Figure 3-6. Example of Channel Allocation

3-30

March 1999

3160-A2-GB21-80

Network Interface

Network Channel Allocation

Operation

N1
N2
N3
N4
N5
N6
N7
N8
N9
N10
N1 1
N12
N13
N14
N15

D1
D2
D3
D4
D5

D9
D10
D1 1
D12
D15
Prt1
Prt1

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
Prt3
Prt2
Prt2
Prt2
Prt2
Prt2
Prt2
Prt3

Figure 3-7. Example of Interface Worksheet for Network Interface

3160-A2-GB21-80

March 1999

3-31

Operation

DTE Drop/Insert (DSX-1) Interface

DTE (DSX-1)
Channel Allocation

D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D1 1
D12
D13
D14
D15

N1
N2
N3
N4
N5

N9
N10
N11
N12

N13

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

channels.

Figure 3-8. Example of Interface Worksheet for DTE Dr op/Insert Interface

3-32

March 1999

3160-A2-GB21-80

Operation

DTE Chan Config Assign: (N1 – 24) Voice (RBS or Data)

D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D1 1
D12
D13
D14
D15

N1 RBS
N2 RBS
N3 RBS
N4 RBS
N5 Data

N9 RBS
N10 RBS
N1 1 Data
N12 Data

N13 Data

D16
D17
D18
D19
D20
D21
D22
D23
D24

Figure 3-9. Example of RBS Information Worksheet

3160-A2-GB21-80

March 1999

3-33

Operation

ACAMI

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, 560,

If Assign By Block

Start At Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, 12,

Port Rate Nx64: 64, 128, 192, 256, 320, 384, 448, 512, 576, 640,

If Assign By

Start At Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, 12,

If Assign By Chan Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, 12,

616, 672, 728, 784, 840, 896, 952, 1008, 1064, 1 120,
1 176, 1232, 1288, 1344

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

704, 768
Nx56: 56, 1 12, 168, 224, 280, 336, 392, 448, 504, 560,

616, 672

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

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, 560,

If Assign By Block

Start At Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, 12,

Port Rate Nx64: 64, 128, 192, 256, 320, 384, 448, 512, 576, 640,

If Assign By

Start At Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, 12,

If Assign By Chan Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, 12,

616, 672, 728, 784, 840, 896, 952, 1008, 1064, 1 120,
1 176, 1232, 1288, 1344

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

704, 768
Nx56: 56, 1 12, 168, 224, 280, 336, 392, 448, 504, 560,

616, 672

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

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

Figure 3-10. Port Channel Configuration Worksheet (Ports 1 and 2)

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March 1999

3160-A2-GB21-80

Port Chan

ACAMI

ACAMI

Conf 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, 560,

If Assign By Block

Start At Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, 12,

Port 3

Port Rate Nx64: 64, 128, 192, 256, 320, 384, 448, 512, 576, 640,

If Assign By

Start At Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, 12,

616, 672, 728, 784, 840, 896, 952, 1008, 1064, 1 120,
1 176, 1232, 1288, 1344

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

704, 768
Nx56: 56, 1 12, 168, 224, 280, 336, 392, 448, 504, 560,

616, 672

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

Operation

Port 4

If Assign By Chan Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, 12,

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

Multiple)
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, 560,
If Assign By Block

Start At Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, 12,

Port Rate Nx64: 64, 128, 192, 256, 320, 384, 448, 512, 576, 640,

If Assign By

Start At Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, 12,

If Assign By Chan Time Slot (Nx or Dx): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, 12,

616, 672, 728, 784, 840, 896, 952, 1008, 1064, 1 120,

1 176, 1232, 1288, 1344

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

One)

704, 768

Nx56: 56, 1 12, 168, 224, 280, 336, 392, 448, 504, 560,

616, 672

13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23

(Select One)

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

Multiple)

Figure 3-11. Port Channel Configuration Worksheet (Ports 3 and 4)

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March 1999

3-35

Operation

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

or key scrolls 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 Table 3-5.

Table 3-5. Display Channel Symbols

Symbol

– The DS0 channel is not allocated.
Prt

n

N

n

D

n

Meaning

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 n,

n

where
The DS0 channel is allocated to the DTE Drop/Insert (DSX-1) interface

DS0 channel

can be any number from 1 through 24.

n

, where n can be any number from 1 through 24.

 Procedure

To 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.

4. From the Edit screen, press the
the screen.

key until the Chan selection appears on

5. Select Chan.

3-36

Edit:
Port NET Chan

F1

F2

March 1999

F3

3160-A2-GB21-80

6. From the Channel Config screen, select Dsply.

Channel Config:
Dsply Clear DTE

Operation

F1

F2

F3

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.

Display Chan:
NET DTE Ports

F1

F2

F3

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

F1

F2

F3

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

F1

F2

F3

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3-37

Operation

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).

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March 1999

3160-A2-GB21-80

 Procedure

To 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.

Operation

4. From the Edit screen, press the

key until the Chan selection appears on

the screen.

5. Select Chan.

Edit:DTE
Port NET Chan

F1

F2

F3

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

F1

F2

F3

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.

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.

3160-A2-GB21-80

Assign To:NET
Next NET DTE

F1

F2

March 1999

F3

3-39

Operation

Block or ACAMI Assignment Method

The Assign By configuration option screen appears after you select a port.

 Procedure

To assign by the block or ACAMI method:

1. Press F2 for Block or F3 for ACAMI.

Assign By:
Next Block ACAMI

F1

F2

F3

or

Assign By:
Next Block ACAMI

F1

F2

F3

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. Available 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

F1

F2

F3

3-40

NOTE:

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

March 1999

3160-A2-GB21-80

Operation

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

F1

Individual Channel Assignment Method

The Assign By configuration option screen appears after you select a port.

 Procedure

To assign by the individual channel method:

1. Press the

2. Press F3 (Chan).

key once to bring the Chan selection onto the screen.

Assign By:Block
Next Block ACAMI

F1

Assign By:Chan
Block ACAMI Chan

F2

F2

F3

F3

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

3160-A2-GB21-80

F1

F2

March 1999

F3

3-41

Operation

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
key scrolls the channels onto the screen in groups of three. Select the
channel by pressing the Function key under the desired number. Port
appears. The port is assigned to that channel. To 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

or

n

F1

F2

F3

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.

 Procedure

To 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
the screen.

key until the Chan selection appears on

5. Select Chan.

3-42

Edit:
Port NET Chan

F1

F2

March 1999

F3

3160-A2-GB21-80

6. From the Channel Config screen, select DTE.

Channel Config:
Dsply Clear DTE

Operation

F1

F2

F3

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

DTE Channels:
Assign Voice

F1

F2

F3

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 D

n.

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 –

F1

F2

F3

 Procedure

To 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 –

F1

F2

F3

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March 1999

3-43

Operation

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
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.

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.

 Procedure

F1

F2

F3

or key scrolls the channels onto the screen in

D1 D2 D3
RBS RBS RBS

F1

F2

F3

To 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 key until the Chan selection appears on
the screen.

5. Select Chan.

Edit:
Port NET Chan

F1

F2

F3

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March 1999

3160-A2-GB21-80

6. From the Channel Config screen, select Clear.

Channel Config:
Dsply Clear DTE

Operation

F1

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

F1

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.

F2

F2

F3

F3

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.

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.

3160-A2-GB21-80

March 1999

3-45

Operation

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 3-12
shows some common clocking configurations. Two sample procedures for
configuring timing are given in the following sections,

Timing

and

Configuring for External Timing

configuration options, refer to Appendix C,

. For more information on

Configuration Options

Configuring for Network

.

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: NETWORK CLOCK: NETWORK

CLOCK: NETWORKCLOCK: INTERNAL

CLOCK: EXTERNAL CLOCK: NETWORK

PBX

CLOCK: DTE (G.703) CONNECTOR

CLOCK: PORT 1, 2, 3, OR 4

CLOCK: NETWORK

CLOCK: NETWORK

496-14341-03

Figure 3-12. Common Clocking Configurations

3-46

March 1999

3160-A2-GB21-80

Configuring for Network Timing

Procedure



To 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.

Operation

4. From the Edit screen, press the
the screen.

5. Select Gen.

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).

Configuring for External Timing

Edit:
NET Chan Gen

F1

F2

F3

Clock Src:NET
Next NET DTE

F1

F2

F3

key until the Gen selection appears on

Procedure



To 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.

3. Select Edit.

4. From the Edit screen, press the
the screen.

3160-A2-GB21-80

March 1999

key until the Gen selection appears on

3-47

Operation

5. Select Gen.

Edit:
NET Chan Gen

F1

F2

F3

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

7. Select the master clock source. For external, press the key until the Ext
selection appears on the screen.

8. Select Ext (external timing).

Clock Src:Ext
Prt1 Int Ext

F1

F2

F3

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

F1

F2

F3

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,

 Procedure

To 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

3. Select Edit.

3-48

Setting a Password

).

appropriate Function key. Use the scroll keys, if necessary.

March 1999

3160-A2-GB21-80

Operation

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

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

Setting a Password

In addition to establishing access security on a port (refer to the previous section,

Establishing Access Security on a Port

specify otherwise, the password is null.

 Procedure

To set a password:

F1

F2

the scroll keys, if necessary.

Password:None
Next None Com

F1

F2

F3

F3

) the password itself is set. Unless you

3160-A2-GB21-80

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 Passwd selection

appears on the screen.

4. Select Passwd.

Control:
Reset CID Passwd

F1

F2

March 1999

F3

3-49

Operation

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

F1

F2

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

F1

F2

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

F3

F3

).

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

F1

F2

F3

3-50

March 1999

3160-A2-GB21-80

" Procedure

To enter a password:

1. Use the and keys to position the cursor under the desired character.
You must enter a character before the key moves the cursor to the next
space to the right. The key is not destructive.

Operation

Passwd:

xxxxxxxx

Up Down Done

F1

F2

F3

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/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:

3160-A2-GB21-80

H The current active user interface has had no activity (no key was pressed) for

at least five minutes.

H The active user interface has been released with the Release command.
H 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.

March 1999

3-51

Operation

Acquiring the Active User Interface

To 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

F1

F2

F3

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

F1

active

F2

F3

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

F1

idle

F2

F3

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March 1999

3160-A2-GB21-80

Releasing the Active User Interface

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

 Procedure

To use the Release command:

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 Rel (Release).

Operation

Control:
Call Rel LED

F1

F2

F3

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

3160-A2-GB21-80

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Operation

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.

 Procedure

To enable or disable the front panel:

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

F1

F2

F3

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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:

H 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).

H 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.

H Disconnect – Disconnects an active modem connection.
H Change Directory – Allows entry of phone numbers into the internal phone

directories.

Operation

For additional information, refer to
Appendix C,

Configuration Options

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.

" Procedure

To 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

User Interface Configuration Options

.

in

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F1

F2

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Operation

4. From the Call Setup screen, select ChDir.

Call Setup:
Pass Dial ChDir

F1

F2

F3

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

F1

F2

F3

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

F1

F2

F3

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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 key inserts blanks (default characters) while the 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.

See Table 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

F1

F2

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Operation

Table 3-6. Valid Phone Number Characters

Valid
Characters Meaning Restrictions

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

otherwise 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.

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

otherwise 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.
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

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

Configuration Options),

To be valid, this must be the first

character in the string.

—

—

—

the active physical

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Operation

 Procedure

To 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

F1

F2

F3

4. From the Call Setup screen, select Pass.

Call Setup:
Pass Dial ChDir

F1

F2

F3

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

F1

F2

F3

6. When the number of the desired directory appears on the screen, press F3

(Dial) to place the call.

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Pass n:

xxxxxxxxx

Up Down Dial

F1

F2

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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.

 Procedure

To initiate a call at the local 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

Operation

F1

F2

F3

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

F1

F2

F3

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

F1

F2

F3

6. When the number of the desired directory appears on the screen, press F3

(Dial) to place the call.

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Dial n:

xxxxxxxxx

Up Down Dial

F1

F2

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Operation

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:

H 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).

H Pressing and holding the

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

" Procedure

To disconnect an established modem connection using the Disconnect command:

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

F1

F2

4. From the Call Setup screen, select Disc.

Call Setup:
Disc ChDir

F3

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

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F1

F2

F3

Disconnect:
Command Complete

F1

F2

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 Procedure

To disconnect a modem connection using two front panel keys:

Operation

1. Press the

and keys simultaneously and hold for two seconds.

Call Setup:
Disc ChDir

F1

F2

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

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

Carrier Installation Manual

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.

.) Unlike standalone DSU/CSUs, the carrier-mounted

F3

COMSPHERE 3000 Series

NOTE:

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

 Procedure

To enable the COM port on the carrier-mounted 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.

4. From the Edit screen, press the
the screen.

5. Select User.

Edit:
Chan Gen User

F1

F2

key until the User selection appears on

F3

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Operation

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

F1

F2

F3

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.
To facilitate IP data routing, the device with the closest link to the SNMP
manager or Telnet 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.

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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Table 3-7. Control Sequence

Sequence ASCII HEX

^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

Operation

^M or ^m CR 0x0D
^N or ^n SO 0x0E
^O or ^o SI 0x0F
^P or ^p DLE 0x10
^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
^_

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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,

 Procedure

To deactivate the alarm relay:

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 ACO.

Configuration Options

Control:
ACO Rel LED

).

F1

F2

F3

4. The Command Complete screen appears.

Alarm Cut-Off:
Command Complete

F1

F2

F3

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Resetting the DSU/CSU

Use the Reset command to perform a power-on reset of the DSU/CSU.

 Procedure

To reset the DSU/CSU:

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

appears on the screen.

2. Select Ctrl.

Operation

3. From the Control screen, press the

on the screen.

4. Select 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.

Download Operations

Control:
ClrReg Reset

F1

F2

Device Reset:
Yes No

F1

F2

key until the Reset selection appears

F3

F3

NOTE:

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

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Operation

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