Adtran DSU III AR User Manual

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61202011L1-1C May 2001

DSU III AR

Data Service Unit

User Manual

Part Number

1202011L1

Trademark Information

Open View is a registered trademark of Hewlett-Packard Company. SunNet Manager is a registered trademark of Sun Microsystems, Inc. Netview is a registered trademark of IBM. IQ View is a trademark of ADTRAN, Inc. Hayes is a trademark of Hayes Microcomputer Products, Inc.

This product includes software developed by the University of California, Berkeley, and its contributors.

901 Explorer Boulevard

P.O. Box 140000

Huntsville, AL 35814-4000

(256) 963-8000

Printed in U.S.A.

The following conventions are used in this manual.

Notes provide additional useful information.

Cautions signi f y in f o rm a tion that could prevent service interr u pti o n .

Warnings provide information that could prevent damage to the equipment or endangerment to human life.

iii

FCC regulations require that the following information be provided in this manual:

1. This equipment complies with Part 68 of the FCC rules. On the bottom of the equipment housing is a label that shows the FCC registration number and Ringer Equivalence Number (REN) for this equipment, if applicable. If required, this information must be given to the telepho ne company.

2. The following information may be required when applying to the local telephone company for leased line facilities.

Service

Type

2.4 kbps Digital Interface

4.8 kbps Digital Interface

9.6 kbps Digital Interface

19.2 kbps Digital Inter face

38.4 kbps Digital Inter face 56 kbps Digital Interface 64 kbps Digital Interface

Digital Facility

Interface Code

04DU5-24 04DU5-48 04DU5-96 04DU5-19 04DU5-38 04DU5-56 04DU5-64

Service Order

Code

6.0F

Network

Jacks

RJ-48S RJ-48S RJ-48S RJ-48S RJ-48S RJ-48S RJ-48S

3. An FCC compliant telephone cord with a modular plug may be 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 FCC Part 68 compliant. See installation instructions for details.

4. If this equipment causes harm to the telephone ne twork, the telephone company may temporarily discontinue service. If possible, advance notification is given; otherwise, notification is given as soon as possible. The telephone company will advise the customer of the right to file a complaint with the FCC.

5. The telephone company may make changes in its facilities, equipment, operations, or proce d ures that could af f ec t th e proper ope ra t io n of thi s eq uipm e nt . If th is h ap pens, the telephone company will provide advance notification and the opportunity to make the necessary modifications to maintain uninterrupted service.

6. If experiencing difficulty with this equipment, please contact ADTRAN for repair and warranty informatio n. If the equipment is causing harm to the network, the te lephone company may r e quest thi s e qui pme nt to b e di sc onnec ted fr om the network until th e problem is resolved or it is certain that the equipment is not malfunctioning.

7. This unit contain s no user serviceable p arts.

8. The FCC recommends that the AC outlet to which equipment requiring AC power is to be installed is provided with an AC surge arrester.

Federal Communications Commission Radio Frequency Interference Statement

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 interferen ce 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 frequencies. 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.

Shielded cables must be used with this unit to ensure compliance with Class A FCC limits.

Change or modifications to this unit not expressly approved by the party responsible for complian c e co uld void the user’s authority to operate the equipment.

Affidavit Requirements for Connection to Digital Services

• An affidavit is required to be given to the telephone company whenever digital

terminal equipment without encoded analog content and billing protection is used to transmit digital signals containing encoded analog content which are intended for eventual conversion into voice band analog signal and transmitted on the network.

• The affidavit shall affirm that either no encoded analog content or billing informa-

tion is being transmitted or that the output of the device meets Part 68 encoded analog content or billing protection specification.

• End use/customer will be responsible to file an affidavit with the local exchange

carrier when connecting unprotected CPE to a 1.544 Mbps or subrate digital service.

• Until such time as subrate digital terminal equipment is registered for voice appli-

cations, the affidavit requirements for subrate services are waived.

CANADIAN EQUIPMENT LIMITATIONS

Notice: The Canadian Industry and Science Canada 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 methods 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 limitations 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 the user to disconnect the equipment.

Users should ensure for their own protection that the electrical ground connections of the power utility, telephone lines and internal metallic water pipe system, if present, are connected together. This precaution may be particularly important in rural areas.

Users should not attempt to make such connections themselves, but should contract the appropriate electric inspection aut hority, or an electrician, as appropriate.

The Load Number (LN) assigned to each terminal device denotes the percentage of the total load to be connected to a telephone loop which is used by the device, to prevent overloading. The termination on a loop may consist of any combination of devices subject only to the requirement that the total of the Load Numbers of all devices does not exceed 100.

CANADIAN EMISSIONS REQUIREMENTS

This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus as set out in the interference-causing equipment standard entitled “Digital Apparatus," ICES-003 of the Department of Communications.

Cet appareil nuerique respecte les limites de bruits radioelectriques applicables aux appareils numeriques de Class A prescrites dans la norme sur le materiel brouilleur: "Appareils Numeriques," NMB-003 edictee par le ministre des Communications.

IMPORTANT SAFETY INFORMATION

When using your telephone equipment, please follow these basic safety precautions to reduce the risk of fire, electrical shock, or personal injury:

1. Do not use this product near water, such as near a bath tub, wash bowl, kitchen

sink, laundry tub, in a wet basement, or near a swimming pool.

2. Avoid using a telephone (other than a cordless-type) during an electrical storm.

There is a remote risk of shock from lightning.

3. Do not use the telephone to report a gas leak in the vicinity of the leak.

4. Use only the power cord, power supply, and/or batteries indicated in the manual.

Do not dispose of batteries in a fire. They may explode. Check with local codes for special disposal instructions.

SAVE THESE INSTRUCTIONS

vii

Affidavit for Connection of Customer Premises Equipment to 1.544 MBPS and/

or Subrate Digital Services

For the work to be performed in the certified territory of ______________ (telco name)

State of ________________________________

County of _______________________ _______

I, _______________________ (name), ____________________ (business address), _____________________ (telephone number) being duly sworn, state:

I have the responsibility for the operation and maintenance of the terminal equipment to be connected to 1.544 Mbps and/or __________________ subrate digital services. The terminal equipment to be connected complies with Part 68 of the FCC rules except for the encoded analog content and billing protection specification. With respect to encoded analog content and billing protection:

( ) I attest that all opera tions associated with the establishment, ma intenance and adjustment of the digital CPE with respect to encoded analog content and billing protection information continuously complies with Part 68 of the FCC rules and Regulations.

( ) The digital CPE does not transmit digital signals containing encod ed a nalog content or billing information which is in tend ed to be decod e d within the telecommunications network.

( ) The encoded analog content and billing protection is factory set and is not under the control of the customer.

I attest that the operator(s) maintainer(s) of the digital CPE responsible for the establishment, maintenance and adjustment of the encoded analog content and billing information has (have) been trained to perform these functions by successfully having completed one of the following (check appropriate blocks):

( ) A. A training course provided by the manufacturer/grantee of the equipment used to encode analog signals; or

( ) B. A training course provided by the customer or authorized representative, using training materials and instructions provided by the manufacturer/grantee of the equipment used to encode analog signals; or

viii

( ) C. An independent training course (e.g., trade school or technical institution) recognized by the manufacturer/grantee of the equipment used to encode analog signals; or

( ) D. In lieu of the proceeding training requirements, the operator(s)/maintainer(S) is (are) under the control of a supervisor trained in accordance with _______________ (circle one) above.

I agree to provide ____________________ (telco’s name) with proper documentation to demonstrate compliance with the information in the preceding paragraph, if so requested.

_______________ ______ Signatur e

_______________ ______ T i t l e

_____________________ Date

Subscribed and sworn to before me

This _________ day of ___________________, 20__

_______________________________________ Notary Public

My commission expires: _________________________

LIMITED PRODUCT WARRANTY

ADTRAN warrants that for five (5) years from the date of shipment to Customer, all products manufactured by ADTRAN will be free from defects in materials and workmanship. ADTRAN also warrants that products will conform to the applicable specifications and drawin gs for such pr oduct s, as containe d in the Produ ct Manual or in ADTRAN's internal specifications and drawings for such products (which may or may not be reflected in the Product Manual). This warranty only applies if Customer gives ADTRAN written notice of defects during the warranty period. Upon such notice, ADTRAN will, at its option, either repair or replace the defective item. If ADTRAN is unable, in a reasonable time, to repair or replace any equipment to a condition as warranted, Customer is entitled to a full refund of the purchase price upon return of the equipment to ADTRAN. This warranty applies only to the original purchaser and is not transferable without ADTRAN's express written permission. This warranty becomes null and void if Customer modifies or alters the equipment in any way, other than as specifically authorized by ADTRAN.

EXCEPT FOR THE LIMITED WARRANTY DESCRIBED ABOVE, THE FOREGOING CONSTITUTES THE SOLE AND EXCLUSIVE REMEDY OF THE CUSTOMER AND THE EXCLUSIVE LIABILITY OF ADTRAN AND IS IN LIEU OF ANY AND ALL OTHER WARRANTIES (EXPRESSED OR IMPLIED). ADTRAN SPECIFICALLY DISCLAIMS ALL OTHER W ARR ANTIES, INCLUDING (WITHOUT LIMITATION), ALL WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. SOME STATES DO NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES, SO THIS EXCLUSION MAY NOT APPLY TO CUSTOMER.

In no event will ADTRAN or its suppliers be liable to Customer for any incidental, special, punitive, exemplary or consequential damages experienced by either Customer or a third party (including, but not limited to, loss of data or information, loss of profits, or loss of use). ADTRAN is not liable for damages for any cause whatsoever (whether based in contract, tort, or otherwise) in excess of the amount paid for the item. Some states do not allow the limitation or exclusion of liability for incidental or consequential damages, so the above limitation or exclusion may not apply to Customer.

Customer Service, Product Support Information, and Training

ADTRAN will replace or repair this product within five years from the date of shipment if the product does not meet its published specification, or if it fails while in service.

A return material authorization (RMA) is required prior to returning equipment to ADTRAN. For service, RMA requests, training, or more information, see the toll-free contact numbe r s gi v e n be lo w.

Presales Inquiries and Applications Support

Please contact your local distributor, ADTRA N Applications Engineering, or ADTRAN Sales:

Applications Engineering (800) 615-1176 Sales (800) 827-0807

Post-Sale Support

Please contact your local distributor first. If your local distributor cannot help, please contact ADTRAN Technical Support and have the unit serial number available.

Technic al Support (888) 4ADTRAN

The Custom Extended Services (ACES) program offers multiple types and levels of service plans which allow you to choose the kind of assistance you need. For questions, call the ACES Help Desk.

ACES Help Desk (888) 874-2237

Repair and Return

If ADTRAN Technical Support determines that a repair is needed, Technical Support will coordinate with the Custom and Product Service (CAPS) department to issue an RMA number. For information regarding equipment currently in house or possible fees associated with repair, contact CAPS directly at the following number:

CAPS Department (256) 963-8722

Identify the RMA number clearly on the package (below address), and return to the following address:

ADTRAN Customer and Product Service 901 Explorer Blvd. Huntsville, Alabama 35806

RMA # _____________

Training

The Enterprise Netw or k (EN) T ec hni cal Tra ini ng Dep ar tme nt of fe rs train in g on our most popular products. These courses include overviews on product features and functions while covering applications of ADTRAN's product lines. ADTRAN provides a variety of training options, including customized training and courses taught at our facilities or at your site. For more information about training, please contact your Territory Manager or the Enterprise Training Coordinator.

Training - phone (800) 615-1176, ext. 7500 Training - fax (256) 963 7941 Training - email training@adtran.com

xii

List of Figures .....................................................................................................................xix

List of Tables .......................................................................................................................xxi

Chapter 1. Introduction

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

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

4-Wire Switched 56 Overview.....................................................................................1-2

Chapter 2. Installation

Unpack, Inspect, Power Up ...............................................................................................2-1

ADTRAN Shipments Include......................................................................................2-1

Customer Provides ....................................................................................................... 2-1

Power Up........................................................................................................................2-2

Rear Panel ............................................................................................................................. 2-3

Network Interface Connection....................................................................................2-4

DTE Data Connection/Primary DTE.........................................................................2-4

Secondary Channel Connection..................................................................................2-4

Chapter 3. Operation

Front Panel Menu Structure ..............................................................................................3-1

Main Menu....................................................................................................................3-1

Status ......................................................................................................................3-2

Test .......................................................................................................................... 3-2

Configuration (Config) ..................................................................... ....................3-2

Dial .......................................................................................................................... 3-2

Basic Menu Travel......................................................................................................... 3-3

Enter .................................................................................................................3-3

Up Arrow ........................................................................................................3-3

Down Arrow ........................... ...... ........................................ .........................3-3

61202011L1-1 DSU III AR User Manual xiii

Table of Contents

Cancel .............................................................................................................. 3-3

Front Panel ...........................................................................................................................3-5

LCD Window ............................................................................... ..................3-5

Enter .................................................................................................................3-5

Numeric Keypad ............................................................................................3-5

Up and Down Arrows ...................................................................................3-5

Cancel .............................................................................................................. 3-5

Shift .................................................................................................................. 3-6

Quick ................................................................................................................3-6

LED Descriptions .......................... ................................................................................3-6

Chapter 4. Configuration Overview

Local And Remote Configuration ....................................................................................4-1

Configuration Methods................................................................................................4-2

VT-100 Connection.............................................. ...... ..... ........................................ .......4-5

AT Commands...............................................................................................................4-6

V.25 Bis Commands......................................................................................................4-7

SDLC Option .........................................................................................................4-7

Character Format ...........................................................................................4-7

Command Structure ......................................................................................4-7

Bi-Sync Option .......................................................................................................4-7

Character Format ...........................................................................................4-7

Command Structure ......................................................................................4-7

Asynchronous Option ..........................................................................................4-8

Character Format ...........................................................................................4-8

Command Structure ......................................................................................4-8

Command Descriptions ................................................................................4-8

Syntax and Possible Responses ...........................................................................4-9

CIC (Connect Incoming Call) .......................................................................4-9

CNL (Configuration Local) ........................................................................4-10

CNR (Configuration Remote) ....................................................................4-10

Switched 56 Operation ...................................................... ..... ...... ......................4-10

CRN (Call Request with Number) ............................................................4-10

CRS (Call Request Using Stored Number) ...............................................4-11

DIC(Disregard Incoming Call) ................................................... ................4-11

PRN (Program Number) .............................................................................4-11

RLN (Request List of Numbers) ................................................................4-12

Chapter 5. Network Configuration

Network Options .................................................................................................................5-1

Loop Rate........................................................................................................................5-1

xiv DSU III AR User Manual 61202011L1-1

Table of Contents

Network Address..........................................................................................................5-3

Remote Configuration.................................................................................................. 5-4

Network Type................................................................................................................5-5

Clock Source ..................................................................................................................5-6

Chapter 6. Configuring DTE Options

DTE Options ........................................................................................................................6-1

DTE Rate.........................................................................................................................6-2

Connector Type.............................................................................................................6-5

Data Format...................................................................................................................6-6

DTE Command Option................................................................................................6-7

Transmit Clock ..............................................................................................................6-8

CS Options ........................ ...... ....................................... ...... ....................................... .6-10

Anti-Stream..................................................................................................................6-12

Carrier Detect (CD) Options...................................................................................... 6-13

TR Options.......................................................... .........................................................6-14

SR Options ................................... ........................................ ........................................ 6-15

Auxiliary Port..............................................................................................................6-16

Chapter 7. Configuring Test Options

Test Options .........................................................................................................................7-1

Test Time-out.................................................................................................................7-1

Remote Digital Loopback ............................................................................................7-2

EIA Local Loopback............................................................................. .........................7-3

EIA Remote Loopback.................................................................................... ..............7-4

Chapter 8. Configuring Dial Options

Dial Options .................................................................................... .....................................8-1

Phone Number ..............................................................................................................8-1

Auto Answer..................................................................................................................8-2

Chapter 9. Manual Command

Manual Command ..............................................................................................................9-1

Using the Front Panel to Enter a Manual Command ..............................................9-2

Chapter 10. Dial Selection

dial Options ........................................................................................................................10-1

Dial Stored Number....................................................................................................10-2

Enter Dial Number...................................................................................................... 10-2

Redial Last Number....................................................................................................10-2

61202011L1-1 DS U I II A R User Manual xv

Table of Contents

Chapter 11. Testing and Troubleshooting

TEST OVERVIEW ................................................ ...... ...... ....................................... ...........11-1

Initiating a Test............................................................................................................11-2

Test Status Display......................................................................................................11-3

Exiting a Test................................................................................................................11-3

Troubleshooting .................................................................................................................11-5

Messages from the DSU/CSU....................................................... ............................11-5

Troubleshooting New Installs.................................................. ..... ...... ......................11-6

Test Sequence for Troubleshooting New Installs or Existing Circuits ........ 11-8

Local Unit diagnostics ....................................................................................................11-10

DTE and Loop (LL)...................................................................................................11-12

Test Description .................................................................................................11-12

Test Purpose .......................................................................................................11-12

Initiating ............................................................................................................. 11-13

Interpreting Test Results ..................................................................................11-13

Loop Only (RT)..........................................................................................................11-14

Test Purpose .......................................................................................................11-14

Initiating ............................................................................................................. 11-15

Interpreting Test Results ..................................................................................11-15

DTE Only....................................................................................................................11-16

Test Purpose .......................................................................................................11-16

Initiating ............................................................................................................. 11-17

Interpreting Test Results ..................................................................................11-17

DTE With Test Pattern..............................................................................................11-18

Test Purpose .......................................................................................................11-18

Initiating ............................................................................................................. 11-19

Interpreting Test Results ..................................................................................11-19

Test Pattern ................................................................................................................11-20

Test Purpose .......................................................................................................11-20

Initiating ............................................................................................................. 11-21

Interpreting Test Results ..................................................................................11-21

Self Test.............. ........................................ ....................................... ..........................11-22

Test Purpose .......................................................................................................11-22

Initiating ............................................................................................................. 11-22

Interpreting Test Results ..................................................................................11-22

Remote Unit Diagnostics ................................................................................................11-23

Test Purpose .......................................................................................................11-24

Initiating ............................................................................................................. 11-24

Test Results ........................................................................................................11-24

Interpreting Test Results ..................................................................................11-25

xvi DSU III AR User Manual 61202011L1-1

Table of Contents

Chapter 12. Viewing Status Information

STATUS display ................................................................................................................12-1

DSU Operational Status.............................................................................................12-2

DDS Network Status...................................................................................................12-3

Network Rate...............................................................................................................12-4

DTE Rate/Mode ..........................................................................................................12-4

DTE Control Leads and Status..................................................................................12-4

Appendix A. Pinouts ....................... ........................................ ........................................ A-1

Appendix B. AT Commands......................................................................................... .. B-1

Appendix C. Default Configuration Profiles ................................................. ............ C-1

Appendix D. EIA-232 Connector.............. ...... ............................................................... D-1

Appendix E. DSU to DSU Tail Circuit....................................................... ................... E-1

Appendix F. Specifications Summary........................................................ ...... ............. F-1

Appendix G. Acronyms/Abbreviations.......................................... ............................. G-1

Appendix H. Glossary..................................................................................................... H-1

Index ............................................................................................................................Index-1

61202011L1-1 DS U I II A R User Manual xvii

Table of Contents

xviii DSU III AR User Manual 61202011L1-1

List of Figures

Figure 1-1. Sample Point-to-Point Application for DSU III AR................................... 1-2

Figure 2-1. DSU III AR Rear View.................................................................................... 2-3

Figure 3-1. Main Menu LCD Display..............................................................................3-1

Figure 3-2. Example of Basic Menu Travel......................................................................3-4

Figure 3-3. DSU III AR Front View ..................................................................................3-5

Figure 4-1. Complete Configuration Menu .................................................................... 4-3

Figure 4-2. Configuration Menu with DTE Options..................................................... 4-4

Figure 5-1. Setting Loop Rate Options ............................................................................5-2

Figure 5-2. Setting the Network Address........................................................................5-3

Figure 5-3. Enabling/Disabling Remote Configuration...............................................5-4

Figure 5-4. Setting Network Type Options.....................................................................5-5

Figure 5-5. Setting the Clock Source................................................................................ 5-6

Figure 6-1. DTE Rates for 56 or 64 kbps Loop Rate with No Secondary Channel....6-2

Figure 6-2. DTE Rates for 56 kbps Secondary Channel and 64 kbps Loop Rates .....6-3

Figure 6-3. Selecting the Connector Type........................................................................6-5

Figure 6-4. Selecting Asynchronous or Synchronous Data Format............................ 6-6

Figure 6-5. Selecting DTE Command Option................................................................. 6-7

Figure 6-6. Transmit Clock Options......................................................................... ..... ...6-8

Figure 6-7. Selecting CS Options....................................................................................6-10

Figure 6-8. Anti-Stream Options....................................................................................6-12

Figure 6-9. Selecting CD Options...................................................................................6-13

Figure 6-10.Selecting TR Options....................................................................................6-14

Figure 6-11 . Setting SR Options........................................................................................ 6-15

Figure 6-12.Setting the Secondary Rate..........................................................................6-16

Figure 7-1. Setting Test Time-out Option........................................................................7-1

Figure 7-2. Remote Digital Loopback..............................................................................7-2

61202011L1-1 DS U I II A R User Manual x i x

List of Figures

Figure 7-3. EIA Local Loopback Options ...................................................... ..................7-3

Figure 7-4. EIA Remote Loopback Options....................................................................7-4

Figure 8-1. Editing Stored Phone Numbers....................................................................8-1

Figure 8-2. Enabling/Disabling the Auto Answer Function........................................8-2

Figure 9-1. Menu Path for Manual Command...............................................................9-1

Figure 10-1.Dial Options Menu .......................................................................................10-1

Figure 10-2.Path to Storing Numbers Option................................................................10-2

Figure 11-1. Normal Operation Before Initiating Loopback Test ................................11-1

Figure 11-2. Initiating a Test..............................................................................................11-2

Figure 11-3. Sample Test Status Displays........................................................................ 11-3

Figure 11-4. Complete Test Menu.....................................................................................11-4

Figure 11-5. DTE & Loop Test.........................................................................................11-12

Figure 11-6. Initiating a DTE & Loop Test..................................................................... 11-13

Figure 11-7. Loop Only Test............................................................................................ 11-14

Figure 11-8. Initiating a Loop Only Test........................................................................11-15

Figure 11-9. DTE Only Test Diagram.............................................................................11-16

Figure 11-10.Initiating a DTE Only Test.................................................... ...... ..... ......... 11-17

Figure 11-11.DTE with Test Pattern................................................................................11-18

Figure 11-12.Initiating a DTE Test with Test Pattern...................................................11-19

Figure 11-13.Test Pattern Only........................................................................................11-20

Figure 11-14.Initiating a Test Using a Test Pattern.......................................................11-21

Figure 11-15.Initiating a Self Test ...................................................................................11-22

Figure 11-16. V.54 RDL with Test Pattern.......................................................................11-23

Figure 11-17.Initiating a Remote Test ............................................................................11-24

Figure 12-1.Examples of Status Displays .......................................................................12-1

Figure D-1. EIA-232 Connector.........................................................................................D-1

Figure E-1. DDS Tail Circuit ..............................................................................................E-2

Figure E-2. Standard EIA-232-D Crossover Cable .........................................................E-3

xx DS U I II A R User Manual 61202011L1-1

List of Tables

Table 4-1. Configuration Methods .................................................................................4-2

Table 5-1. Loop Rate Commands ...................................................................................5-2

Table 5-2. Network Address Command .......................................................................5-3

Table 5-3. Remote Configuration Commands..............................................................5-4

Table 5-4. Netw ork Type Commands............................................................................ 5-5

Table 5-5. Setting the Clock Source ................................................................................5-6

Table 6-1. DTE Rate AT Commands..............................................................................6-2

Table 6-2. Scrambler On/Off AT Commands ..............................................................6-3

Table 6-3. Data Format Commands ............................................................................... 6-6

Table 6-4. Transmit Clock AT Commands....................................................................6-8

Table 6-5. CS Options AT Commands............................................................. ............6-11

Table 6-6. Short and Long Delays at Different Operating Speeds........................... 6-11

Table 6-7. Anti-Stream AT Commands ....................................................................... 6-12

Table 6-8. CD Options AT Commands........................................................................ 6-13

Table 6-9. TR Options AT Commands.........................................................................6-14

Table 6-10. S R Options AT Commands.........................................................................6-15

Table 6-11. Auxiliary Port AT Commands...................................................................6-17

Table 6-12. DSU III AR Network Throughput .............................................................6-17

Table 7-1. Test Timeout AT Commands........................................................................7-2

Table 7-2. Remote Digital Loopback AT Commands.................................................. 7-2

Table 7-3. EIA Local Loopback AT Commands........................................................ ...7-3

Table 7-4. EIA Remote Loopback AT Commands .......................................................7-4

Table 8-1. AT Command for Storing Phone Numbers................................................8-2

Table 8-2. AT Commands for Auto Answer.................................................................8-2

Table 9-1. Manual Commands........................................................................................9-3

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List of Tables

Table 11-1. Messages from the DSU/CSU ....................................................................11-5

Table 11-2. Troubleshooting New Installs.....................................................................11-7

Table 11-3. AT Commands..............................................................................................11-9

Table 11-4. Test AT Commands....................................................................................11-10

Table 11-5. DTE With Test Pattern Commands..........................................................11-11

Table 11-6. Remote Tests and AT Commands............................................................11-23

Table A-1. RJ-48S Telco Connector Pinouts ..................................................................A-1

Table A-2. Primary EIA-232 Connector Pinouts...........................................................A-2

Table A-3. Primary V.35 Connector Pinouts.................................................................A-3

Table A-4. Auxiliary EIA-232 Connector Pinouts........................................................A-4

Table B-1. AT Commands................................................................................................B-2

Table B-2. Loop Rate Commands....................................................................................B-3

Table B-3. Network Address Command........................................................................B-3

Table B-4. Remote Configuration Commands..............................................................B-3

Table B-5. Network Type Commands............................................................................B-4

Table B-6. Clock Source Commands...............................................................................B-4

Table B-7. DTE Rate AT Commands ..............................................................................B-4

Table B-8. Scrambler On/Off AT Commands...............................................................B-5

Table B-9. Data Format Commands................................................................................B-5

Table B-10. Transmit Clock AT Commands....................................................................B-5

Table B-11. CS Options AT Commands ................. ........................................ ..................B-6

Table B-12. Anti-Stream AT Commands .........................................................................B-6

Table B-13. CD Options AT Commands..........................................................................B-7

Table B-14. TR Options AT Commands...........................................................................B-7

Table B-15. SR Options AT Commands...........................................................................B-7

Table B-16. Secondary Rate AT Commands....................................................................B-8

Table B-17. Test Time-out AT Commands ......................................................................B-8

Table B-18. Remote Digital Loopback AT Commands..................................................B-8

Table B-19. EIA Local Loopback AT Commands ......................................... ..... .............B-9

Table B-20. EIA Remote Loopback AT Commands .......................................................B-9

Table B-21. AT Command for Storing Phone Numbers................................................B-9

Table B-22. AT Commands for Auto Answer.................................................................B-9

Table B-23. Test AT Commands......................................................................................B-10

xxii DSU III AR User Manual 61202011L1-1

List of Tables

Table B-24. DTE With Test Pattern Commands............................................................B-11

Table B-25. Remote Tests and AT Commands..............................................................B-11

Table C-1. User Profiles ................................................................................................... C-1

Table C-2. Default Configuration Profiles ....................................................................C-2

61202011L1-1 DS U I II A R User Manual xx iii

List of Tables

xxiv DSU III AR User Manual 61202011L1-1

Chapter 1

Introduction

PRODUCT OVERVIEW

The ADTRAN DSU III AR provides a reliable, high speed data connection for customer Data Terminal Equipment (DTE) through Digital Data Service (DDS) lines, DDS secondary channel services (DDSII), or 4-wire Switched 56 network (SW56) lines. The DSU III AR supports both synchronous and asynchronous data communication over the DDS or 4-wire Switched 56 networ ks.

This unit is an all rate DSU/CSU, supporting services from 2.4 to 64 kbps including 19.2 and 38.4 kbps services. The DSU III AR may be used in either point-to-point or multi-point circuits.

The DSU III AR provides both V.35 and EIA-232 electrical and physical DTE interfaces to accommodate a variety of applications. A second EIA-232 interface is provided for use on DDS lines with secondary channel services.

To ensure a reliable connection, the unit features an extended receiver capability which permits operation over long loops (3.4 miles or 5.5 km of 26 AWG at 56 kbps).

In addition to DDS, the unit supports Switched 56 (4-wire) service with dialing accomplished from the front panel. This model is compatible with AT&T Accunet and Sprint SW56 type services.

Figure 1-1 on page 1-2 shows a sample point-to-point application for the DSU III AR.

61202011L1-1 DSU III AR User Manual 1-1

Chapter 1. Introduction

ENTER

CANCEL

SHIFT

RS CS T D RD CD AL M TST

DSU III DBU

ENTER

CANCEL

SHIFT

RS CS T D RD CD AL M TST

DSU III DBU

Router DSU III AR DSU III AR

DDS Overview

Digital Data Service (DDS) is a nationwide service that allows interconnection and transport of data at speeds up to 64 kbps. The local exchange carriers provide the local loop service to DDS customers and may provide data for routing Inter-LATA to an interexchange carrier. In DDS mode, the DSU III AR supports all DDS service rates yielding DTE rates of 2.4, 4. 8, 9.6, 19.2, 38.4 (sync or async), 56 and 64 kbps (synchronous). An additional rate of 57.6 kbps is available in async mode. At the DDS service rates of 56 kbps and 64 kbps, the unit can be configured to run slower DTE rates (async or sync). Secondary channel operation is supported at all service rates up to 56 kbps, provid ing terminal rates of 75, 150, 300, 600, 1200, and 2400 bps. The secondary rates available depend on the DDS service rate configured.

DSU III DBU

1 2 3

ENTER DAEBF 4 5 6

7 8 9

RS CS TD RD CD ALM TST

SHIFT

SHIFT #0

CANCEL

DDS

Network

DSU III DBU

1 2 3

ENTER

DAEBF 4 5 6

7 8 9

RS CS TD RD CD ALM TST

SHIFT

SHIFT #0

CANCEL

Router

56 kbps56 kbps

Figure 1-1. Sample Point-to-Point Application for DSU III AR

4-Wire Switched 56 Overview

This switched, 4-wire Digital Data Service allows customers to pay for data connection only for the time the unit is active. The regional operating companies provide the 4-wire local loop service to SW56 customers. In SW56 mode the DSU III AR supports DTE rates of

2.4, 4.8, 9.6, 19.2, 38.4 (asynchronous or synchronous) and 56 kbps (synchronous). An additional DTE rate of 57.6 kbps is available in asynchronous modes.

1-2 DSU III AR User Manual 61202011L1-1

Chapter 2

Installation

UNPACK, INSPECT, POWER UP

Carefully inspect the DSU III AR for any shipping damages. If damage is suspected, file a claim immediately with the carrier and contact ADTRAN Customer Service. If possible, keep the origin al shipping container for use in shipping the DSU III AR for repair or for verification of damage during shipment.

ADTRAN Shipments Include

The following items are included in ADTRAN shipments of the DSU III AR:

• DSU III AR unit

• An 8-position modular to 8-position modular cable

• The DSU III AR User Manual

Customer Provides

• Male EIA-232 (st a nda rd 25-pin D-type), or

• Male V.35 interface cable.

Pinouts for the rear connectors are included in Appendix A, Pinouts on page A-1.

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Chapter 2. Installation

Power Up

Each DSU III AR unit is provided with a captive 8-foot power cord, terminated by a three-prong plug which connects to a grounded 115 VAC power receptacle. A telco connector is also provided for interface to the network.

Power to the DSU must be provided from a grounded 115 VAC, 60 Hz receptacle.

2-2 DSU III AR User Manual 61202011L1-1

REAR PANEL

The rear panel contains three DTE connectors which provide primary channel V.35 or EIA-232 , and a s econdary channe l EIA-23 2 port (auxiliary EIA -232). An 8-pin telco jack, a captive power cord, and a power switch are also located on the rear panel. Pin assignments for the DT E and network connections are listed in Appendix A, Pinouts on page A-1. The DSU III AR rear panel is shown in Figure 2-1.

Chapter 2. Installation

Power Switch

115 VAC

60HZ .15A

OFF

6 115 VAC Connection

3 Telco Connection

TELCO

4 Primary EIA-232 Connector

1 Aux EIA-232

AUXILIARY EIA-232

PRIMARY V.35

PRIMARY EIA-232

5 Primary V.35 Connector

No. Item Function

1 Auxiliary EIA-232 Secondary channel services 2 Power Switch Used to turn power on or off 3 Telco Connection Connection to the dedicated circuit 4 Primary EIA-232 DTE interface 5 Primary V.35 High speed DTE interface 6 115 VAC Connection Power cord connection

Figure 2-1. DSU III AR Rear View

61202011L1-1 DSU III AR User Manual 2-3

Chapter 2. Installation

Network Interface Connection

The DSU III AR has an eight-position modular jack labeled T The connector is used for connecting to the network when the unit is configured for either dedicated or switched operation. The pin assignments for the telco connector are listed in Table A-1 on page A-1.

DTE Data Connection/Primary DTE

The primary DTE rate is configured from the front panel. The primary DTE can oper a te in asynchronou s or sync hronous modes

The primary DTE should be connected to either the EIA-232 DTE connector or the CCITT V.35 DTE connector.

The maximum cable lengths recommended are 50 feet for the EIA-

232. The pin assignments for the primary EIA-232 connector are shown in Table A-2 on page A-2. The EIA-232 connector works up to 56 kbps with a low capacitance cable or with the external transmit clock option selected.

For the CCITT V.35, the maximum cable lengths are 100 feet. The pin assignments for the V.35 are shown in Table A-3 on page A-3.

The V.35 connector is recommended for use with data rates above

19.2 kbps.

ELCO

To prevent possible radio frequency interference emissions, a shielded cable is required.

Secondary Channel Connection

If used, the secondary DTE should be connected to the au xiliary EIA-232 connector. The pinout for the connector is shown in Table A-4 on page A-4.

2-4 DSU III AR User Manual 61202011L1-1

Chapter 3

Operation

FRONT PANEL MENU STRUCTURE

The DSU III AR uses a multilevel menu approach to access its many features. All menu operations are displayed in the LCD window.

The opening menu is the access point for all other operations. There are four Main menu branches: Status, Test, Configuration and Dial.

Each main menu item has several functions and submenus to identify and access specific parameters.

Main Menu

The following paragraphs briefly describe the main menu's four branches, displayed on the front panel LCD (see Figure 3-1). Detailed information is provided in the individual chapters for each menu branch.

1 = STATUS 2 = TEST 3 = CONFIG 4 = DIAL

Figure 3-1. Main Menu LCD Display

61202011L1-1 DSU III AR User Manual 3-1

Chapter 3. Operation

Status

Status is used to display all relevant information for the network and DTE interfaces. It displays the current operating mode, loop status, rate of service from the network, DTE data rate and format, and TR, SR, LL, and RL DTE interface lead status. The display returns to the status menu when the front panel is not accessed. See Chapter 12, Viewing Status Information on page 12-1 for more detailed information.

Test

Test is used to contro l local and re m o t e te s ting. Select local or remote testing, and select the type of test and test pattern when required. For more information see Chapter 7, Configuring Test Options on page 7-1.

Configuration (Config)

Configuration is used to select network and DTE operating parameters. This menu branch is divided into several chapters for easier reference. The division includes a brief overview chapter followed by a separate chapter for each of the five submenus of the CONFIG branch: Network Configuration on page 5-1, Configuring

DTE Options on page 6-1, Configuring Test Options on page 7-1, Configuring Dial Options on page 8-1, and Manual Command on page

9-1.

Dial

Dial provides manual dialing functions. Key in a number to dial, select one of the ten stored numbers, or redial the last dialed number. This menu is available for use only when AT&T/MCI SW56 or US SPRINT SW56 is the selected network type. See

Chapter 10, Dial Selection on page 10-1 for more information.

The DIAL option is only available when the unit is configured for a Switched 56 network type. For more information, see Chapter 10, Dial Selection on page 10-1.

3-2 DSU III AR User Manual 61202011L1-1

Basic Menu Travel

Four function keys on the left side of the DSU III AR keypad allow the various menu branches to be entered, exited, and scrolled through. The four function keys are defined below.

Enter

Selects a displayed item.

Up Arrow

Scrolls up the submenu items.

Down Arrow

Scrolls down the submenu items.

Cancel

Exits (back one level) from the current branch of the menu. To choose a menu item, press the corresponding number or alpha

character on the keypad (press The item flashes on and off to show it is the currently selected (active) choice. Press the up and down arrow keys to scroll through the available menu items. Press

Chapter 3. Operation

to activate alpha characters).

Shift

to select the flashing item.

Enter

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Chapter 3. Operation

The following Step/Action Table and Figure 3-2 illustrate how to select the DSU III AR Loop Rate option.

Step Action

To select C

2 To select L

ONFIGURATION

or R

OCAL

EMOTE

ONFIG

), press 3; then

Enter

test, press the corresponding

number; then press Enter.

3 4 Choose an item on the submenu such as N

5 6 7

Use the up and down arrows to view submenu items.

ETWORK OP

TIONS

Press 1 to select N Press 1 to select L

ETWORK OPT

OOP RATE

options; then press

then press

;

Enter

When the current network loop rate flashes, you can

scroll up or down to view possible options.

To select a new loop rate, press the corr esponding num-

ber; then press

Enter

1=LOOP RATE

1=LOCAL 1=NETWORK OPT. 2=NETWORK ADDR

3=CONFIG 2=DTE OPTIONS 3=REMOTE CONFIG.

2=REMOTE 3=TEST OPTIONS 4=NETWORK TYPE

4=DIAL OPTIONS 5=CLOCK SOURCE 5=MANUAL COMMAND

Figure 3-2. Example of Basic Menu Travel

3-4 DSU III AR User Manual 61202011L1-1

FRONT PANEL

The DSU III AR faceplate is shown in Figure 3-3. Descriptions of each part of the front panel follow the figure.

Chapter 3. Operation

DSU III AR

RS CS TD RD CD ALM TST

LCD Window

Displays menu items and messages in 2 lines by 16 characters.

Enter

Selects active menu items. To activate a menu item, press the number of the item. The menu item flashes, indicating it is the active selection. Press

Numeric Keypad

The numeric keypad contains the numbers 0 through 9 and alpha characters A through F, which are used to activate menu items and enter parameters.

ENTER

CANCEL

45ED6

789

SHIFT

Figure 3-3. DSU III AR Front View

to select the menu item.

Enter

B 2

C 3

QUICK

Up and Down Arrows

Use the up and down arrows to scroll through the submenu items in the current menu. Submenu items appear two at a time in a circular or wrapping fashion. The submenu items are displayed in either a forward or reverse pattern.

Cancel

The

key stops the current activity and returns to the

Cancel

previous menu. Repeat until the desired menu level is re ached.

61202011L1-1 DSU III AR User Manual 3-5

Chapter 3. Operation

Shift

To enter alpha characters, press To activate a menu item designated by an alpha character rather

than a number, press indicating which paramet er is activated. Press item.

If a key is pressed without using active instead of the alpha item.

Quick

During most operations, the main menu. During a test, the Test menu. In SW56 operation, if the unit is not in test, the key returns to the D

LED Descriptions

The DSU III AR has seven LED indicators, which are described below.

before each desired character.

Shift

then the letter. The menu item flashes,

Shift,

Enter

, the numbered item becomes

Shift

key returns the display to the

Quick

key returns to the top of the

Quick

menu.

IAL

to select the

Quick

RS CS TD RD CD ALM TST

3-6 DSU III AR User Manual 61202011L1-1

REQUEST TO SEND CLEAR TO SEND TRANSMIT DATA RECEIVE DATA CARRIER DETECT ALARM INDICATION TEST MODE MANUAL

Chapter 4

Configuration Overview

LOCAL AND REMOTE CONFIGURATION

The DSU III AR can be configured locally using the front panel or remotely by establishing communications with another DSU. The front panel of the local DSU can then be used to configure the remote DSU. During remote configuration, the DSU III AR pr ompts for the remote address before continuing to the C (CONFIG) menus.

ONFIGURATION

The C

ONFIGURATION

relating to a specific interface or function of the DSU III AR that requires setup.

1=Network Opt. Network Interface Parameters 2=DTE Options DTE Interface Parameters 3=Test Options Unit Test Options 4=Dial Options Unit Dialing Options 5=Manual Command ADTRAN Specific Commands

The DSU III AR contains four different user profiles (sets of configurations options) that are stored in read-only memory (see Appendix C, Default Configuration Profiles on page C-1). The unit is shipped from the factory with profile number 1 (default configuration) loaded into the current (nonvolatile configuration) memory. If profile 1 matches requirements for the system, then no

61202011L1-1 DSU III AR User Manual 4-1

menu consists of a group of five submenus

Chapter 4. Configuration Overview

additional configuration is required to put the unit into service. If profile 1 does not match system requirements, it can be modified, or one of the other profiles that more closely matches the system requirements can be loaded into current memory. When a different profile is loaded, or the existing profile is modified, it is stored in the current (nonvolatile configuration) memory. The DSU III AR is then configured with that profile every time power is turned on or until the unit is reset.

For detailed information on configuration see Chapter 5, Network Configuration on page 5-1, Chapter 6, Configuring DTE Options on page 6-1, Chapter 7, Configuring Test Options on page 7-1, Chapter 8,

Configuring Dial Options on page 8-1, and Chapter 9, Manual Command on page 9-1.

Configuration Methods

The DSU III AR responds to the following methods of configuration:

• VT-100 Compatible Terminal

•AT Commands

• V.25 Commands

•Front Panel Commands

• Remote Commands from another DSU running SLIP/PPP protocol.

The DSU III AR provides methods for both local and remote configuration. These methods are shown in Table 4-1.

Table 4-1. Configuration Methods

Stand Alone

Method Local Remote

AT Commands Yes Yes V.25 Commands Yes Yes Front Panel Yes Yes DATAMATE No Yes VT-100 Yes Yes

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Chapter 4. Configuration Overview

A complete Configuration menu is shown in Figure 4-1; the Configurati on menu tree with DTE options is shown in Figure 4-2 on page 4-4.

1= AUTO

1= LOOP RATE 2= 2.4K

1= NETWORK OPT. 2= NETWOR K ADDR 3= 4.8K

1= LOCAL 3= REMOTE CONFIG 4= 9.6K

4= NETWORK TYPE 5= 19.2K

3=CONFIG 5= CLOCK SOURCE 6= 38.4K

7= 56K

2= REMOTE ENTER REMOTE 8= 64K

ADDRESS:0 2= DTE OPTIONS 1= DTE RATE

See Figure 4- 2 on page 4- 4 2= CONNECTOR TYPE for a more detail ed 3= DATA FORMAT view of this section. 4= DTE CMD OPTION

5= TRANSMIT CLOCK 6= CS OPTIONS 7= ANTI-STREAM 8= CD OPTIONS 9= TR OPTIONS A= SR OPTIONS B= AUXILIARY PORT

ENTER TIMEOUT

3= TEST OPTIONS 1= TEST TIMEOUT 0 OFF: 00 SEC

2= RDL EN/DIS 1= RDL IGNORED

2= RDL ACCEPTED

3= EIA LLB EN/DIS 1= DISABLED 4= EIA RLB EN/DIS 2= ENABLED

4= DIAL OPTIONS 1= PHONE NUMBER STORED NUMBER

TO EDIT (1-10):1

2= AUTO ANSWER 1= DISABLED

2= ENABLED

5= MANUAL COMMAND COMMAND COMMAND: HH

VALUE: 00

Figure 4-1. Complete Configuration Menu

61202011L1-1 DSU III AR User Manual 4-3

Chapter 4. Configuration Overview

1= DTE RATE Options vary according to loop rate.

2= CONNECTOR TYPE 1= RS-232

2= DTE OPTION S

3= DATA FORMAT 1= ASYNCHRONOUS 1= ASYNC 9 BITS

4= DTE CMD OPTION 2= AT COMMAND SET

5= TRANSMIT CLOCK 1= NORMAL

6= CS OPTIONS 2= FOLLOWS RS

7= ANTI-STREAM 3= TIME 30 SECONDS

2= V.35

2= SYNCHRONOUS 2= ASYNC 10 BITS

3= ASYNC 11 BITS

1= DISABLED

3= V.25 SYNC 4= V.25 BSC/ASYNC

2= EXTERNAL

1= FORCED ON

3= FOLLLOWS CD 4= FOLLOWS RS+ CD 5= OFF WITH LOCD 1= TIMER OFF

2= TIME 10 SECONDS

4= TIME 60 SECONDS

1= FORCED O N

8= CD OPTIONS 2= NORMAL

3= OFF WITH LOCD

9= TR OPTIONS 1= IGNORED

2= IDLE WHEN OFF 1= FORCED ON 3= OFF>ON DIAL #1 2= OFF OOS ONLY 4= OFF>ON DIAL #2 3= OFF LOCD ONLY

A= SR OPTIONS 4= OFF TEST ONLY

5= OFF TEST +OOS

1= EIA-232 6= OFF TEST + LOCD

B= AUXILIARY PORT 2= V.35

Figure 4-2. Configuration Menu with DTE Options

4-4 DSU III AR User Manual 61202011L1-1

VT-100 Connection

The DSU III AR can be configured and controlled over a direct EIA232 connection to the Auxiliary Port located on the back of the unit. To set up the D SU III AR for a VT-100 terminal session, the following steps are required:

Step Action

1. From the front panel set the connection baud rate. Follow the

menu below to display the appropriate configuration parameters. Select one of the C

3= CONFIG 1= LOCAL 2= DTE OPTIONS 2= CONNECTOR TYPE

2=REMOTE ENTER ADDRESS 4= DTE CMD OPTION

Chapter 4. Configuration Overview

ONTROL

1= DTE RATE

3= DATA FORMAT

5=TRANSMIT CLOCK 6= CS OPTI ONS 7= ANTI-STREAM 8= CD OPTIONS 9= TR OPTIONS A= SR OPTIONS

B= AUXILIARY PORT

baud rates.

1= 1.2K AT_CMD 2= 75 SEC 3= 150 SEC 4= 300 SEC 5= 600 SEC 6= 1.2K SEC 7= 2.4K SEC 8= OFF

9= 300 CONTROL A= 1.2K CONTROL B= 2.4K CONTROL C= 9.6K CONTROL

2. After the baud rate is selected, a passcode prompt is displayed.

Enter the desired passcode, or press

to accept the 123

Enter

default.

3. Configure the VT-100 emulator with the appropriate baud rate,

DATA BITS

O PARITY BITS

, N

STOP BIT

, 1

, and N

O FLOW

control (8N1). Refer to the VT-100 emulator documentation for details on configuration.

4. Connect the VT-100 terminal to the female RS-232 connector,

labeled A

5. Press

UXILIARY PORT

<Enter>

on the VT-100 terminal and a passcode prompt is

, located on the back of the unit.

displayed. Enter the passcode from step 2.

61202011L1-1 DSU III AR User Manual 4-5

Chapter 4. Configuration Overview

AT Commands

The DSU III AR can be configured and controlled with in-band AT commands from an asyn chronous DTE por t jus t as modems a re.

To exit the data mode and enter the command mode, the asynchronous DTE device must transmit a proper escape sequence or three pluses (+++) to the DSU III AR. A specified time delay must occur between the last data character and the first escape sequence character. This is the guard time delay, and it can be changed by w ritin g a va lue to the S12 re giste r. The default val ue for the guard time is one second. For a valid escape sequence to occur, the DTE must transmit the escape code character three times in succession with delay between each character being less than the guard time.

Once the command mode is entered, AT commands can be transmitted to the DSU III AR to configure most of the options or initiate tests to check both the DSU III AR and the network connections. All command lines must begin with the AT attention code in either capital or lower case letters. The command that follows must match the case of the attention code.

The command line may contain a single co mmand or a series of commands after the AT attention code. When a series of commands is used, the individual commands may be separated with spaces for readability. The maximum length for a command line is 40 characters. Each command line is executed by the DSU III AR upon receipt of a terminating character. The default terminating character is a carriage return (ASCII 013), but it can be changed by writing a different value to register S3.

Before the terminating character is transmitted, the command line can be edited by using the backspace character (ASCII 008) to erase errors so the proper commands can be entered.

Valid AT commands for the DSU III AR are listed in Appendix B, AT Commands on page B-1.

4-6 DSU III AR User Manual 61202011L1-1

V.25 Bis Commands

When configured for the V.25 bis option, the DSU III AR accepts inband dialing an d configuration commands from both sy nchronous and asynchronous DTE ports.

The V.25 bis option supports the following protocols:

• SDLC (Synchronous Data Link Control)

• BI-SYNC

•ASYNCHRONOUS

SDLC Option

Character Format

• Data bits - 8

•Parity bit - Ignored

Command Structure

[F][A][C][V.25 bis COMMAND][FCS][F]

Chapter 4. Configuration Overview

The address field [A] is FFH. The control field [C] is set to 13H except for cases of multi-frame responses. For this case, the control field is set to 03H in all but the last frame. The 03H in the cont rol field indicates that other frames are to follow while the 13H in the control field indicates the final frame.

Bi-Sync Option

Character Format

• Data bits - 7

•Parity bit - Odd

Command Structure

[SYN][SYN][STX][V.25 bis COMMAND][ETX]

61202011L1-1 DSU III AR User Manual 4-7

Chapter 4. Configuration Overview

Asynchronous Option

Character Format

Start bit - 1 Data bits - 7 Parity bit - Even Stop bit - 1

Command Structure

[V.25 bis COMMAND][CR][LF]

Command Descriptions

The ADTRAN V.25 bis command set is a subset of the CCITT V.25 bis command set. In addition to the CCITT commands supported, ADTRAN has added configuration commands for both local and remote DSUs.

The ADTRAN V.25 bis command set follows:

CIC Connect incoming call CNL Configuration local CNR Configuration remote CRN Call request with number CRS Call reque st us ing s tor ed num ber DIC Disregard incoming call PRN Program number RLN Request list of numbers

4-8 DSU III AR User Manual 61202011L1-1

Chapter 4. Configuration Overview

The following list contains possible responses to V.25 bis commands:

VAL Valid V.25 command processed CFIET Call failed on switched network - busy detected CFIDE Call failed on switched network - no wink de-

tected CFINS Call failed - no dial string in specified re gi ste r INVCU Unknown command detected INVPS Invalid parameter syntax INVPV Invalid parameter value INVBL Invalid local pass wo rd INVBM Invalid remote passwor d INC Incoming call CNX Call connected

If verbose responses are disabled (A TV0), the following list of threecharacter responses are the only ones returned:

VAL Valid V.25 command processed INV Invalid command received CFI Call failed INC Incoming ca ll CNX Call connected

Syntax and Possible Responses

CIC (Connect Incoming Call)

This command causes the DSU to go on-line. For dial backup units, this command hangs up the dial backup line and initiates an attempt to reestablish the main (DDS) line. There are no parameters associated with this command. Possible indications include VAL, CNX, and CFIxx.

61202011L1-1 DSU III AR User Manual 4-9

Chapter 4. Configuration Overview

CNL (Configuration Local)

This command is used to pass AT commands to the local modem via the V.25 bis command processor. This allows the DSU III AR to be configured with A T commands via a synchronous interface. The command has the following format:

CNL[LOCAL PASSWORD;]AT[ONE OR MORE AT COMMANDS]

A local pass word may not be r e q uired, depe nd i n g on the prese nt configuration of the unit . Responses to CNL commands are returned in the data format currently configured. Possible responses include VAL and INVn.

CNR (Configuration Remote)

This command is used to pass AT commands over the network to the remote DSU via the V.25 bis command processor. This allows a remote DSU III AR to be configured from a synchronous interface. The command's format is as follows:

CNR[REMOTE PASSWORD;]AT[ONE OR MORE AT COMMANDS]

The remote password may or may not be required depending on the present configuration of the remote unit. Responses to the CNR commands are returned in the data format currently configured. Possible responses include VAL and INVn.

Switched 56 Operation

CRN (Call Request with Number)

When the DSU III AR is configured for SW56 operation, the CRN command causes the DSU to dial the supplied number. The command's format follows:

CRN[NUMBER TO BE DIALED]

If no number is included in the command, the number stored in dial register number 1 is dialed. If no number is provided and no number is stored in dial register number 1, the DSU III AR responds with the call failure indication CFINS (Call Failure Indication Not Stored).

For a DBU unit, this command initiates dialing on the backup circuit. If the number suppli ed contains non-dialable digits, they

4-10 DSU III AR User Manual 61202011L1-1

Chapter 4. Configuration Overview

are ignored and only the dialable digits are dialed. Possible responses include VAL, CNX, and CFIxx.

CRS (Call Request Using Stored Number)

The CRS command causes the DSU III AR to dial the number stored in the specified register. The format of this command is as follows:

CRS [OPTIONAL SPACE][REGISTER NUMBER 1-10]

If this command is issued without the register number parameter, the INVPS (Invalid Parameter Synta x ) response is issued. If this command is issued and the register parameter is not in the valid range for dialing registers, the INVPV (Invalid Parameter Value) response is returned. Other responses include VAL, CNX, and CFIxx.

DIC(Disregard Incoming Call)

This command causes the V.25 bis processor to return to command mode even if there is an incoming call pending. This allows local commands to be issued and incoming calls to be ignored. Ther e are no parameters associated with this command. The DSU responds with VAL.

PRN (Program Number)

This command stores the supplied number into the specified register. Th e com mand has the following format:

PRN REGISTER NUMBER;[NUMBER TO BE STORED]

If this command is entered with no parameters, the INVPS response is returned. If no register number is included in the command or if it is invalid, the INVPV response is returned. This response is also returned if the number to be stored contains invalid characters. The characters 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, P, T, and & are valid dial characters. If no digits ar e is sued wi th this command, the specified register is cleared. The DSU responds with VAL.

61202011L1-1 DSU III AR User Manual 4-11

Chapter 4. Configuration Overview

RLN (Request List of Numbers)

This command causes the DSU III AR to return the number stored in the specified register. The format of this command follows:

RLN [REGISTER NUMBER]

If the register number is invalid, the INVPV response is returned. When a correct register number is entered, the following response is returned:

LSN [REGISTER NUMBER];[NUMBER STORED]VAL

If no register number is present in the command, the DSU III AR responds with a list of all the registers and the stored numbers. This list is followed by the VAL response.

4-12 DSU III AR User Manual 61202011L1-1

Chapter 5

Network Configuration

NETWORK OPTIONS

Loop Rate

ETWORK OPTIONS

The N operation of the DSU III AR.

Once a parameter is set, C before returning to the active menu.

The Loop Rate option sets the loop operating speed. The unit should be set to the rate required by the DDS Service. The DSU III AR also supports subrate DTE data over a 56 kbps or 64 kbps loop. The loop rate must be set independently of the DTE rate.

The default factory setting is A DSU will automatically attempt to adapt to the loop rate. Since 64k and 56k secondary channels look identical on the network, the DSU III will adapt to 56k secondary channel for either loop rate. If the loop rate is known, select the rate from the menu. The various loop rates and format selections are listed in Figure 5-1 on page 5-2. The equivalent AT commands that perform the same configuration functions are shown in Table 5-1 on page 5-2.

Eight loop rate selections are available (shown in Figure 5-1). After selecting any loop rate other than A secondary channel is available. The secondary channel rate is determined by the current loop rate.

configuration parameters control the loop

OMMAND ACCEPTED

UTO

. When configured to A

UTO

is displayed bri efly

or 64

KBPS

the option for a

UTO

, the

61202011L1-1 DSU III AR User Manual 5-1

Chapter 5. Network Configuration

1= AUTO

1= LOOP RATE 2= 2.4K

1=NETWORK OPT. 2= NETWORK ADDR 3= 4 .8K 1= NO SEC CH

1=LOCAL 3= REMOTE CONFIG 4= 9.6K 2= SEC CHANNEL

4= NETWORK TYPE 5= 19.2K

3=CONFIG 5= CLOCK SOURCE 6= 38.4K

2=DTE OPTIONS 7= 56K

2=REMOTE ENTER ADDRESS 3=TEST OPTIONS 8= 64K

4=DIAL OPTIONS 5=MANUAL COMMAND

Figure 5-1. Setting Loop Rate Options

Table 5-1. Loop Rate Commands

Front Panel AT Command

AUTO %B0

2.4K with no secondary channel %B1

4.8K with no secondary channel %B2

9.6K with no secondary channel %B3

19.2K with no secondary channel %B4

38.4K with no secondary channel %B5 56K with no secondary channel %B6 64K clear channel %B7

2.4K with secondar y cha nnel %B9

4.8K with secondar y cha nnel %B10

9.6K with secondar y cha nnel %B11

19.2K with secondary channel %B1 2

38.4K with secondary channel %B1 3 56K with secondary channel %B14

5-2 DSU III AR User Manual 61202011L1-1

Chapter 5. Network Configuration

Network Address

A two-digit decimal address can be assigned to each DSU III AR. This addressing capability makes it possible to perform remote configuration and testing in point-to-point and multi-drop networks. Figure 5-2 shows the menu path used to change the network address. The factory default address setting is 0. Table 5-2 shows the AT commands used to set the network address.

1=LOOP RATE

1=NETWORK OPT. 2=NETWORK ADDR ENTER NETWORK

1=LOCAL 3=REMOTE CONFIG ADDRESS: 0

4=NETWOR K TY P E

3=CONFIG 5=CLOCK SOURCE

2=DTE OPTIONS

2 =REMOTE ENTER 3=TEST OPTIONS

ADDRESS 4=DIAL OPTIONS

5=MANUAL COMMAND

Figure 5-2. Setting the Network Address

Table 5-2. Network Address Command

Front Panel AT Command Description

XX (Decimal) _N=xx A ss i gns a 2-digit Network Address

61202011L1-1 DSU III AR User Manual 5-3

Chapter 5. Network Configuration

Remote Configuration

This option sets up the DSU III AR to accept or reject remote configuration commands. Figure 5-3 sho ws t he m enu pat h for enabling/disabling remote configuration. The factory

default setting is E

1= NETWORK OPT. 2= NETWORK ADDR

1= LOCAL 3= REMOTE CONFIG 1= DISABLED

3= CONFIG 5= CLOCK SOURCE

2= DTE OPTIONS

2= REMOTE E NTER 3= TEST OPTIONS

ADDRESS 4= DIAL OPTIONS

5= MANUAL COMMAND

NABLED

Figure 5-3. Enabling/Disabling Remote Configuration

1= LOOP RATE

4= NETWORK TYPE 2= ENABLED

Table 5-3 shows the equivalent AT commands used to enable or disable remote configuration.

Table 5-3. Remote Configuration Commands

Front Panel AT Command Description

1=DISABLE &P4 Disable Remote Configuration 2=ENABLE &P5 Enable Remote Configu ra tion

5-4 DSU III AR User Manual 61202011L1-1

Chapter 5. Network Configuration

Network Type

This option configures the DSU III AR for the specific type of network being used. The choices are D

SW56. The facto ry default setting is

and US S

EDICATED

1= LOCAL 3= REMOTE CONFIG 1= DEDICATED

3=CONFIG 5= CLOCK SOURCE 3= US SPRINT SW 56

2= REMOTE ENTER 3= TEST OPTIONS

ADDRESS 4= DIAL OPTIONS

(see Figure 5-4).

1= LOOP RATE

1= NETWORK OPT. 2= NETWORK ADDR.

4= NETWORK TYPE 2= AT&T/MCI SW 56

2= DTE OPTIONS

5= MANUAL COMMAND

Figure 5-4. Setting Network Type Options

EDICATED

, AT&T/MCI SW56,

SW56 is selected, the Main

When AT&T/MCI SW56 or US S menu displays the D

IAL

selection.

Table 5-4 shows the equivalent AT commands that perform the same configuration functions.

Table 5-4. Network Type Commands

Front Panel AT Command Description

1=DEDICATED &L0 A ny 4-wire DDS Network 2=AT&T/MCI &L1 AT&T/MCI Switched 56 Service 3=US SPRINT &L2 US SPRINT Switched 56 Service

61202011L1-1 DSU III AR User Manual 5-5

Chapter 5. Network Configuration

Clock Source

LOCK SOURCE

The C III AR internal circuitry. The choices are F

ASTER

. The factory default setting is F

5-5).

1= NETWORK OPT. 2= NETWORK ADDR

1= LOCAL 3= REMOTE CONFIG

3=CONFIG 5= CLOCK SOURCE 2= FROM NETWORK

2= DTE OPTIONS

2= REMOTE ENTER 3= TEST OPTIONS

ADDRESS 4= DIAL OPTIONS

5= MANUAL COMMAND

When operating on a DDS network, the timing should be from the most stable clock source, usually F point private network, one DSU III AR must be set for M the other set for FROM commands for setting the clock source.

options specify the timing source for the DSU

ROM NETWORK

1= LOOP RATE

4= NETWORK TYPE 1= MASTER

and

(see Figure

Figure 5-5. Setting the Clock Source

ETWORK

ROM NETWORK

. T able 5-5 shows the equivalent AT

. On a point-to-

ASTER

and

When the DSU III AR is set as the master clock source, it will default to its internal oscillator as the clock reference. T o enable the External DTE port as the reference clock for the circuit, see Chapter

6, Configuring DTE Options on page 6-1.

Table 5-5. Setting the Clock Source

Front Panel AT Command Descriptio n

1=MASTER _X0 DSU is the master timing source 2=FROM NETWORK _X1 Network RX Signal is timing source

5-6 DSU III AR User Manual 61202011L1-1

Chapter 6

Configuring DTE Options

DTE OPTIONS

The DTE O parameters that control the operation of the DSU III AR's DTE Interface such as the DTE rate, connector type, data format, DTE command options, transmit clock, CS options, ant i-stream, and CD options.

PTIONS

menu is used to select the configuration

61202011L1-1 DSU III AR User Manual 6-1

Chapter 6. Configuring DTE Options

DTE Rate

The selectable DTE rates over a 56 or 64 kbps loop with no secondary channel are shown in Figure 6-1. If a slower loop rate is selected, then the DTE rate automatically matches the loop rate. If an attempt is made to set the DTE rate for l oop rates slower than 56 kbps, the DSU III AR briefly displays DTE R

ETWORK

N setting is S

ATE SAME AS THE

before returning to the status screen. The factory default

AME AS LOOP

1= NETWORK OPT.

1= DTE RATE 2= 4.8K

1= LOCAL 2= CONNECTOR TY PE 4= 19.2K

2= DTE OPTIONS 3= DATA FORMA T 5= 38.4K

4= DTE CMD OPTION 6= 56K/57.6K For 64Kbps Loop

3=CONFIG 5= TRANSMIT CLOCK 7= SAME AS LOOP 1= SCRAMBLER OFF

6= CS OPTIONS 2= SCRAMBLER ON

2= REMOTE ENTER ADDRESS 3= TEST OPTIONS 7= ANTI-STREAM 3= DATA INVERT

4= DIAL OPTIONS 8= CD OPTIONS 5= MANUAL 9= TR OPTIONS

A= SR OPTIONS B= AUXILIARY PORT

1= 2.4K

3= 9.6K

Figure 6-1. DTE Rates for 56 or 64 kbps Loop Rate with No Secondary Channel

The equivalent AT commands for setting the DTE rate for a 56 kbps loop rate with no secondary channel are shown in Table 6-1.

Table 6-1. DTE Rate AT Commands

Front Panel AT Co mman d Description

1=DTE 2.4K %K3 DTE rate 2.4K sync and async 2=DTE 4.8K %K4 DTE rate 4.8K sync and async 3=DTE 9.6K %K5 DTE rate 9.6K sync and async 4=DTE 19.2K %K6 DTE rate 19.2K sync and async 5=DTE 38.4K %K7 DTE rate 38.4K sync and async 6=DTE 56K/57.6K %K8 DTE rate 56K sync or 57.6 async 7=SAME AS LOOP %K9 DTE rate same as loop speed

6-2 DSU III AR User Manual 61202011L1-1

Chapter 6. Configuring DTE Options

If the DSU III AR is set for a loop rate of 56 kbps with secondary channel, then S in Figure 6- 2. The factory def au lt setting is S

1= NETWORK OP T . 1= 2.4K

1= LOCAL 2= DTE OPTIONS 1= DTE RATE 2= 4.8K

3=CONFIG 4= DTE CMD O PTION 5= 38.4K 1= SCRAMBLER OFF

2= REMOTE ENTER 3= TEST OPTIONS 6= CS OPTIONS 7= SAME AS LOOP 3= DATA INVERT

ADDRESS 4= DIAL OPTIONS 7= ANTI-STREAM

5= MANUAL 8= CD OPTIONS

CRAMBLER ON/OFF

2= CONNECTOR TYPE 3= 9.6K 3= DATA FORMAT 4= 19.2K

5= TRANSMIT CLOCK 6= 56K/57.6K 2= SCRAMBLER ON

9= TR OPTIONS A= SR OPTIONS B= AUXILIARY PORT

options are available as shown

CRAMBLER OFF

56 Kbps Secondary Channel Loop Rates

Figure 6-2. DTE Rates for 56 kbps Secondary Channel and 64 kbps Loop Rates

Table 6-2 shows the equivalent AT commands for setting

CRAMBLER ON/OFF

for loop rates of 56 kbps with secondary

channel and 64 kbps.

Table 6-2. Scrambler On/Off AT Commands

Front Panel AT C omm and Description

1=SCRAMBLER OFF _F0 DTE data scrambler disabled 2=SCRAMBLER ON _F1 DTE data scrambler enabled 3=DATA INVERT _F2 DTE data invert enabled (56 kbps second-

ary channel Loop Rate only). LBE codes from DTE suppressed (64 kbps only).

61202011L1-1 DSU III AR User Manual 6-3

Chapter 6. Configuring DTE Options

For point-to-point operation at 56 kbps with secondary channel, the network requires that the primary and secondary channel data not be all zeros simultaneously. For HDLC protocol applications, this constraint can be eliminated by select ing either the D

BLER ON

option. The factory default setting is S

For 64 kbps clear channel operation, there is a possibility that the DTE data sequences might mimic network loop maintenance functions and erroneously cause other network elements to activate loopbacks. To prevent this, the

for both the local and remote DSU III AR.

CRAMBLER ON

UPPRESS

ATA INVERT

LBE

option or the S

CRAMBLER OFF

CRAM

option should be selected

6-4 DSU III AR User Manual 61202011L1-1

Chapter 6. Configuring DTE Options

Connector Type

ONNECTOR TYPE

The C primary channel connectors is used to connect to the DTE. Figure 6-3 shows the menu path used to set the connector type. The factory default setting is V.35. There are no AT commands available

to set the connector ty pe.

1= LOCAL 1=DTE RATE 1= RS-232

3=CONFIG 4= DTE CMD OPTION

2= REMOTE ENTER ADDRESS 3= TEST OPTIONS 6= CS OPTIONS

option is used to specify which of the

1= NETWOR K OPT.

2= DTE OPTIONS 2= CONNECTOR TYPE 2= V.35

3= DATA FORMAT

5= TRANSMIT CLOCK

4= DIAL OPTIONS 7= ANTI-STREAM 5= MANUAL 8= CD OPTIONS

9=TR OPTIONS A= SR OPTIONS B=

AUXILIARY PORT

Figure 6-3. Selecting the Connector Type

61202011L1-1 DSU III AR User Manual 6-5

Chapter 6. Configuring DTE Options

Data Format

ATA FORMAT

The D

SYNCHRONOUS

or A factory default setting is S

SYNCHRONOUS

option is used to select either the S

mode of operation for the DTE interface. The

YNCHRONOUS

is chosen, the length of the data bytes must be

selected.

1= NETWORK OPT.

1= DTE RATE 1= ASYNC 9 BITS

2= DTE OPTIONS 2= CONNECTOR TYPE 1= ASYNCHRONOUS 2= ASYNC 10 BITS

1= LOCAL 3= DATA FORMAT 2 = SYNCHRONOUS 3 = ASYNC 11 BITS

4= DTE CMD OPTION 5= TRANSMIT CLOCK

3=CONFIG 6= CS OPTIONS

7= ANTI-STREAM

2= REMOTE ENTER 3= TEST OPTIONS 8= CD OPTIONS

ADDRESS 4= DIAL OPTIONS 9= TR OPTION S

5= MANUAL COM. A= SR OPTIONS

B= AUXILIARY PORT

Figure 6-4. Selecting Asynchronous or Synchronous Data Format

Table 6-3 shows the AT commands that can be used to set the D F

ORMAT

Table 6-3. Data Format Commands

YNCHRONOUS

(see Figure 6-4). If

ATA

Front Panel AT Command Description

1=ASYNCHRONOUS &Q0 Always asynchronous 2=SYNCHRONOUS &Q2 Always synchronous

For asynchronous options, select the length of the data bytes. 1=ASYNC 9 BITS N/A 9 bits including start, stop, parity 2=ASYNC 10 BITS N/A 10 bits including start, stop, parity 3=ASYNC 11 BITS N/A 11 bits including start, stop, parity

6-6 DSU III AR User Manual 61202011L1-1

DTE Command Option

Chapter 6. Configuring DTE Options

The DTE C

OMMAND

option is used to enable AT commands from the DTE, enable V.25 bis SDLC (Synchronous Data Link Control) commands, enable V.25 (Bisync and Async), or disable all DTE

command modes (see Figure 6-5).

1= NETWORK OP T.

1= LOCAL 1= DTE RATE

2= CONNECTOR TYPE 3= DATA FORMAT

3=CONFIG 2= DTE OPTIONS 4= DTE CMD OPTION 1= DISABL ED

5= TRANSMIT CLOCK 2= AT COMMAND SET

2 =REMOTE ENTER 3= TEST OPTIONS 6= CS OPTIONS 3= V.25 SYNC

ADDRESS 4= DIAL OPTIONS 7= ANTI-STREAM 4= V.25 BSC/ASYNC

5= MANUAL COM. 8= CD OPTIONS

9= TR OPTIONS A= SR OPTIONS B= AUXILIARY PORT

Figure 6-5. Selecting DTE Command Option

mode (idle in SW56 mode, force d

When the unit is in DTE CMD O with TR option, or from escape seque nce in AT mode) with AT C

or V.25 S

ORMAT

use V.25 B

SYNC

commands for asynchronous data format.

YNC

selected, the DTE fo rmat is indepen den t of the D

option. However, if V.25 BSC/A

ISYNC

(BSC) commands for synchronous data format or V.25

PTION

SYNC

is selected, the unit will

OMMAND

ATA

61202011L1-1 DSU III AR User Manual 6-7

Chapter 6. Configuring DTE Options

Transmit Clock

RANSMIT CLOCK

The T used to transfer data from the DTE into the DSU III AR. Figure 6-6 shows the menu path used to set the T

factory default in N

1= LOCAL 3= DATA FORMAT

3= CONFIG 6= CS OPTIONS 2= EXTERNAL

2= REMOTE ENTER ADDRESS 3= TEST OPTIONS 8= CD OPTIONS

option is used to select the source of the clock

RANSMIT CLOCK

ORMAL

1= NETWOR K OPT.

1= DTE RATE 2= CONNECTOR TYPE

4= DTE CMD OPTION

2= DTE OPTIONS 5= TRANSMIT CLOCK 1= NORMAL

7= ANTI-STREAM

4= DIAL OPTIONS 9= TR OPTIONS 5= MANUAL COM. A= SR OPTIONS

B= AUXILIARY PORT

option. The

Figure 6-6. Transmit Clock Options

Table 6-4 shows the A T commands used to set the T

RANSMIT CLOCK

option.

Table 6-4. Transmit Clock AT Commands

Front Panel AT Command Description

1=NORMAL &X0 TX clock from DSU selected 2=EXTERNAL &X1 ETC clock from DTE selected

XTERNAL CLOCK

The E M

ASTER CLOCK

under DTE Options connector type. The C

ETWORK OPTIONS

option allows the DSU III AR to accept

timing from the External DTE Port as defined

must also be set to M

LOCK SOURCE

ASTER

as noted in Network

under

Configuration on page 5-1.

6-8 DSU III AR User Manual 61202011L1-1

Chapter 6. Configuring DTE Options

XTERNAL CLOCK

The E

option is normally used in modem tail circuit

applications. See Appendix E, DSU to DSU Tail Circuit on page E-1 for information about the DSU to modem interconnect diagram for this application.

The E

XTERNAL CLOCK

option is also recommended when the

EIA-232 connector is used for 56 kbps and 64 kbps applications. A

special DSU cable diagram for this application is shown in Appendix D, EIA-232 Co nn e ctor on page D-1. Using this option and special cable eliminates data errors caused by excessive delays in the DTE transmit clock receiver and transmit data driver.

61202011L1-1 DSU III AR User Manual 6-9

Chapter 6. Configuring DTE Options

CS Options

The C

LEAR TO SEND

(CS O

PTIONS

) menu is used to select one of five

different control modes for the CS lead. Figure 6-7 shows the menu path used to access the CS O

setting is F

1= LOCAL 1= DTE RATE

3=CONFIG 4= DTE CMD OPTION 1= FORCED ON 1= CS DELA Y SHORT

2= REMOTE ENTER 3= TEST OPTIONS 6= CS OPTIONS 3= FOLLOWS C D

ADDRESS 4= DIAL OPTIONS 7= ANTI-STREAM 4= FOLLOWS RS+CD 1= CS DELAY SHORT

OLLOWS

1= NETWORK OPT.

2= DTE OPTIONS 2= CONNECTOR TYPE

5= MANUAL COM. 8= CD O PTIONS 5= OFF THE LOCD 2= CS DELAY LONG

RS with CS D

3= DATA FORMAT

5= TRANSMIT CLOCK 2= FOLLOW RS 2= CS DELAY LONG

9= TR OPTIONS A= SR OPTIONS B= AUXLILARY PORT

PTIONS

menu. The default factory

ELAY SHORT

Figure 6-7. Selecting CS Options

If one of the options chosen involves request to send (RS), then the delay from RS to CS must be sele cted . Table 6-5 on page 6- 11 shows the AT C

OMMANDS

used to set the CS O

PTIONS

6-10 DSU III AR User Manual 61202011L1-1

Chapter 6. Configuring DTE Options

Table 6-5. CS Options AT Commands

Front Panel AT Command Description

1=FORCED ON &R0 CS always on. 2=FOLLOWS RS &R1 CS on wit h RS afte r del ay ; off whe n RS

or if DSU cannot pass data.

3=FOLLOWS CD &R2 CS off when CD goes off or if DSU can-

not pass data.

4=FOLLOWS RS+CD &R3 CS follows RS after d ela y and also off if

CD off. If CD goes off after RS is on, DSU III AR will turn off CS but continue to pass data until RS goes off. CS also off if DSU cannot pass data.

5=OFF WITH LOCD &R4 Off 5 sec after LOCD. Valid only in SW56

mode. CS is forced on but will turn off for

5 seconds after a call is disconn ected. For RS options, se lec t the RS to CS delay length. 1=CS DELAY SHORT _D0 Short Dela y from RS to CS selected. 2=CS DELAY LONG _D1 Long Delay from RS to CS selected.

Specified times for the short and long delays at the different operating speeds are shown in Table 6-6.

Table 6-6. Short and Long Delays at Different Operating Speeds

Rate Short Option Long Option Tolerance

Add to Maximum Time for Secondary Channel

64K 1.1ms 16.1ms ±.4ms 56K 1.1ms 16.1ms ±.4ms .33ms

38.4K 1.5ms 16.5ms ±.4ms .63ms

19.2K 1.5ms 16.5ms ±.4ms 1.25ms

9.6K 1.5ms 16.5ms ±.4ms 2.5ms

4.8K 1.9ms 16.9ms ±.7ms 5.0ms

2.4K 3.8ms 18.8ms ±1.3ms 10.0ms

61202011L1-1 DSU III AR User Manual 6-11

Chapter 6. Configuring DTE Options

Anti-Stream

The A

NTI-STREAM

option is used to select the anti-stream time-out.

The anti-stream time-out is the maximum time the DSU III AR transmits data into the network from the DTE. This feature prevents one DTE device on a multi-drop network from continuously tying up the tra nsmit circuit back to the master DSU. Figure 6-8 shows the menu path used to access the A

NTI-STREAM

options menu. The anti-stream timer is reset to zero when RS changes to the active

state and is updated every second while RS is active. When the anti-stream time-out expires, the DSU III AR stops transmitting DTE data into the network b ut continues to accept data from it. This condition exists until the DTE deactivates the RS input.

1= NETWORK OPT

1= LOCAL 1= DTE RATE

2= DTE OPTIONS 2= CONNECTOR TYPE

3= DATA FO RMAT

3= CONFIG 4= DTE CMD OPTION 1= TIMER OFF

5= TRANSMIT CLOCK 2= TIME 10 SEC.

2= REMOTE ENTER 3= TEST OPTIONS 6= CS OPTIONS 3= TIME 30 SEC.

ADDRESS 4= DIAL OPTIONS 7= ANTI-STREAM 4= TIME 60 SEC.

5= MANUAL COM. 8= CD OPTIONS

9= TR OPTIONS A= SR OPTIONS B= AUXILIARY PORT

Figure 6-8. Anti-Stream Options

The factory default setting is T

IMER OFF

. Table 6-7 shows the

available o ptions and their AT commands.

Table 6-7. Anti-Stream AT Commands

Front Panel AT Command Description

1=TIMER OFF %T0 Anti-stream timer disabled 2=TIME 10 SEC. %T1 Time-out equal 10 seconds 3=TIME 30 SEC. %T2 Time-out equal 30 seconds 4=TIME 60 SEC. %T3 Time-out equal 60 seconds

6-12 DSU III AR User Manual 61202011L1-1

Carrier Detect (CD) Options

Chapter 6. Configuring DTE Options

ARRIER DETECT

The C

(CD) O

PTIONS

menu is used to select one of

three different control modes for the receive line signal detector (CD) lead. The default factory setting is N

1= NETWORK OPT.

1= LOCAL 1= DTE RATE

2= DTE OPTIONS 2= CONNECTOR TYPE

3= DATA FORMAT

3= CONFIG 4= DTE CMD OPTION

5= TRANSMIT CLOCK

2= REMOTE ENTER ADDRESS 3= TEST OPTIONS 6= CS OPTIONS

4= DIAL OPTIONS 7= ANTI-STREAM 1= FORCED ON 5= MANUAL COM. 8= CD OPTIONS 2= NORMAL

9= TR OPTIONS 3= OFF WITH LOCD A= SR OPTIONS B= AUXILIARY PORT

ORMAL

Figure 6-9. Selecting CD Options

Table 6-8 shows the equivalent AT commands for setting CD options.

Table 6-8. CD Options AT Commands

(see Figure 6-9).

Front Panel AT Command Description

1=FORCED ON &C0 On all the time 2=NORMAL &C1 On only when data present on loop. 3=OFF WITH LOCD &C2 On except after disconnect in Switched

56 application

61202011L1-1 DSU III AR User Manual 6-13

Chapter 6. Configuring DTE Options

TR Options

menu is used to select the DSU III AR response to

The TR O the data terminal ready (TR) lead. The factory default setting is

GNORED

1= LOCAL 1= DTE RATE

3= CONFIG 4= DTE CMD OPTION

2= REMOTE ENTER ADDRESS 3= TEST OPTIONS 6= CS OPTIONS

PTIONS

(see Figure 6-10).

1= NETWORK OPT.

2= DTE OPTIONS 2= CONNECTOR TYPE

3= DATA FORMAT

5= TRANSMIT CLOCK

4= DIAL OPTIONS 7= ANTI-STREAM 1= IGNORED 5= MANUAL COM. 8= CD OPTIONS 2= IDLE WHEN OFF

9= TR OPTIONS 3= OFF> ON DIAL #1 A= SR OPTIONS 4= OFF> ON DIAL #2 B= AUXILIAR Y P ORT

Figure 6-10. Selecting TR Options

Table 6-9 shows the equivalent AT commands for setting

TR O

PTIONS

Table 6-9. TR Options AT C ommands

Front Panel AT Command Description

1=IGNORE &D0 Ignore the TR input. 2=IDLE WHEN OFF &D2 See the following note. 3=OFF>ON DIAL #1 &D3 Dial Stored #1: TR goes off to on (SW56 only). 4=OFF>ON DIAL #2 &D4 Dial Stored #2: TR goes off to on (SW56 only).

DLE WHEN OFF

For I

option: In SW56 mode, TR off will cause the DSU to go On Hook (Idle). The unit also will not dial out if TR is off. In dedicated mode, the DSU will go into DTE command mode when TR goes off. When TR goe s on, if the DSU does not receive a command in the number of seconds set in S40, the DSU will go into data mode.

6-14 DSU III AR User Manual 61202011L1-1

Chapter 6. Configuring DTE Options

SR Options

menu is used to select the operating mode for the

The SR O data set ready (SR) lead. From the DTE options menu, press

to activate the SR O

The factory default setting is O

1= LOCAL 1= DTE RATE

3=CONFIG 4= DTE CMD OPTION

2= REMOTE ENTER ADDRES S 3= TEST OPTIONS 6= C S OPTIONS

PTIONS

submenu; then press E

FF TEST ONLY

1= NETWORK OPT.

2= DTE OPTIONS 2= CONNECTOR TYPE

3= DATA FORMAT

5= TRANSMIT CLOCK

4= DIAL OPTIONS 7= ANTI-STREAM 1= FORCED ON 5= MANUAL COM. 8= CD OPTIONS 2= OFF OOS ONLY

9= TR OPTIONS 3= OFF LOCD ONLY

A= SR OPTIONS 4= OFF TEST ONLY

B= AUXILIARY PORT 5 = OFF TEST +OOS

(see Figure 6-11).

Figure 6-11. Setting SR Op ti ons

Shift +

NTER

to selec t.

6= OFF TEST + LOCD

PTIONS

Table 6-10 shows the AT commands for setting SR O

Table 6-10. SR Options AT Commands

Front Panel AT Command Description

1=FORCED ON &S0 Alway s on 2=OFF OOS ONLY &S1 Off when network Out Of Service

(OOS)

3=OFF LOCD ONLY &S3 Off 5 seconds after disconnect (SW56

only) 4=OFF TEST ONLY &S0_C0 Off when unit is in test 5=OFF TEST +OOS &S1_C0 Off in test or OOS 6=OFF TEST +LOCD &S5 Off 5 seconds after disconnect or test

61202011L1-1 DSU III AR User Manual 6-15

Chapter 6. Configuring DTE Options

Auxiliary Port

UXILIARY PORT

The A

option is used to select the operating speed for

the secondary channel if the secondary channel option was selected during setup of the N

ETWORK OPTIONS

DTE options menu, press submenu and press

UXILIARY PORT

The A

Enter

has an internal 256 byte buffer. If the

Shift + B

to select. The factory default is OFF.

(see Figure 6-12). From the

to activate the A

UXILIARY PORT

secondary channel speed is higher than the throughput in the network, CTS flow control is activated. If the secondary DTE does not respond to CTS flow control, care should be taken to prevent the A

UXILIARY PORT

internal buffer from overflowing. The

option may also be used to provide VT-100 menu

access through the EIA-232 interface. For more details on this option, refer to VT -1 00 Con nec tion on page 4-5.

1= NETWORK OPT.

1= LOCAL 1= DTE RATE

2= DTE OPTIONS 2= CONNECTOR TYPE

3= DATA FORM AT 1= 1.2K AT_CMD

3= CONFIG 4= DTE CMD OPTION 2= 75 SEC

5= TRANSMIT CLOCK 3= 150 SEC

2= REMOTE ENTER ADDRESS 3= TEST OPTIONS 6= CS OPTIONS 4= 300 SEC

4= DIAL OPTIONS 7= ANTI-STREAM 5= 600 SEC 5= MANUAL COM. 8= CD OPTIONS 6= 1.2K SEC

9=TR OPTIONS 7= 2.4K SEC A= SR OPTIONS 8= OFF B= AUXILIARY PORT 9= 300 CONTROL

A= 1.2K CONTROL B= 2.4K CONTROL C= 9.6K CONT ROL

Figure 6-12. Setting the Secondary Rate

6-16 DSU III AR User Manual 61202011L1-1

Chapter 6. Configuring DTE Options

Table 6-11 shows the equivalent AT commands for setting the secondary rate option. Network throughput is shown in Table 6-12.

Table 6-11. Aux iliary Port AT Commands

Front Panel AT Command Description

1=OFF _Y0 No secondary channel selected 2=75 _Y1 Secondary channel rate: 75 bps 3=150 _Y2 Secondary channel rate 150 bps 4=300 _Y3 Secondary channel rate: 300 bps 5=600 _Y4 Secondary channel rate 600 bps 6=1.2K _Y5 Secondary channel rate 1200 bps 7=2.4K _Y6 Secondary channel rate: 2400 bps

Table 6-12. DSU III AR Network Throughput

Loop Rate Secondary Channel Throughput

2.4k 78

4.8k 156

9.6k 312

19.2k 627

38.4k 1.25k 56k No Scrambler 1.83k 56k Scrambler 2.4k

61202011L1-1 DSU III AR User Manual 6-17

Chapter 6. Configuring DTE Options

6-18 DSU III AR User Manual 61202011L1-1

Chapter 7

Configuring Test Options

TEST OPTIONS

EST OPTIONS

The T and specifies the maximum test time allowed.

menu enables or disables different test modes

Test Time-out

EST TIME-OUT

The T remains in a test mode before automatically returning to the data mode. Enter the time-out from 0 to 255 seconds. The factory default setting is off (0). Figure 7-1 shows the menu path used to access

EST TIME-OUT

1= LOCAL 2= DTE OPTIONS

3=CONFIG 3= TEST OPTIONS 1= TEST TIMEOUT ENTER TIME-OUT

2= REMOTE ENTER ADDRESS 5= MANUAL 3= EIA LLB /EN /DIS

option sets the length of time a DSU III AR

1= NETWORK OPT.

4= DIAL OPTIONS 2 = RD L/E N /DIS (0=OFF: 00 SEC)

4= EIA RLB /EN /DIS

Figure 7-1. Setting Test Time-out Option

61202011L1-1 DSU III AR User Manual 7-1

Chapter 7. Configuring Test Options

Table 7-1 shows the equivalent AT commands for setting the

EST TIME-OUT

Table 7-1. Test Timeout AT Commands

Front Panel AT Command Description

ENTER TIMEOUT S18=x Specify 0 - 255 seconds test time-out

Remote Digital Loopback

EMOTE DIGITAL LOOPBACK

The R

(RDL) option specifies whether the

DSU III AR responds to an RDL request from the far end of the circuit. The factory default setting is RDL A

CCEPTED

. Figure 7-2

shows the menu path used to access this option.

1= NETWORK OPT.

1= LOCAL

3=CONFIG 2= DTS OPTIONS 1= TEST TIMEOUT 1= RDL IGNORED

3= TEST OPTIONS 2= RDL/EN /DIS 2= RDL ACCEPTED

2= REMOTE ENT ER ADDRESS 4= DIAL OPTIONS 3= EIA LLB /EN /DIS

5= MANUAL 4= EIA RLB /EN /DIS

Figure 7-2. Remote Digital Loopback

Table 7-2 shows the equivalent AT commands for setting the

RDL O

PTION

Table 7-2. Remote Digital Loopback AT Commands

Front Panel AT Command Description

1=RDL IGNORED &T5 RDL request from remote DS U ignor ed 2=RDL ACCEPTED &T4 RDL request accepted

7-2 DSU III AR User Manual 61202011L1-1

Chapter 7. Configuring Test Options

EIA Local Loopback

The EIA LLB (Electronics Industries Association Local Loopback) option specifies whether the DSU III AR responds to the LLB input from the DTE. The factory default setting is D

shows the menu path used to access the EIA LLB option.

1= NETWORK OPT.

1= LOCAL

2= DTE OPTIONS 1= TEST TIMEOUT

2= RDL/EN /DIS

3=CONFIG 3= TEST OPTIONS 3= EIA LLB /EN /DIS 1= DISABLED

4= DIAL OPTIONS 4= EIA RLB /EN /DIS 2= ENABED

2= REMOTE ENTER ADDRESS 5= MANUAL

Figure 7-3. EIA Local Loopback Options

Table 7-3 shows the equivalent AT commands for setting the

EIA LLB options.

Table 7-3. EIA Local Loopback AT Commands

ISABLED

. Figure 7-3

Front Panel AT Command De scription

1=DISABLED _A0 EIA LLB disabled 2=ENABLED _A1 EIA LLB enabled

61202011L1-1 DSU III AR User Manual 7-3

Chapter 7. Configuring Test Options

EIA Remote Loopback

The EIA RLB (Electronics Industries Association Remote Loopback) option specifies whether the DSU III AR responds to the RLB input from the DTE. The factory default setting is D

Figure 7-4 shows the menu path for the EIA RLB options.

1= NETWORK OPT.

1= LOCAL 1= TEST TIMEOUT

3=CONFIG 2= DTS OPTIONS 2= RDL/EN /DIS

3= EIA LLB /EN /DIS

2= REMOTE ENTER ADDRESS 3= TEST OPTIONS 4= EIA RLB /EN /DIS 1= DISABLED

4= DIAL OPTIONS 2= ENABED 5= MANUAL

Figure 7-4. EIA Remote Loopback Options

Table 7-4 shows the equivalent AT commands for setting the EIA RLB options.

Table 7-4. EIA Remote Loopback AT Commands

ISABLED

Front Panel AT Command Description

1=DISABLED _R0 EIA RLB disabled 2=ENABLED _R1 E IA RLB enabled

7-4 DSU III AR User Manual 61202011L1-1

Chapter 8

Configuring Dial Options

DIAL OPTIONS

IAL OPTIONS

The D defines the A configured for Switched 56 operation.

menu stores up to ten phone numbers and

UTO ANSWER

operation of the DSU III AR when it is

Phone Number

The DSU III AR stores up to 10 numbers of 36 digits each. Edit a phone number by reentering the entire number. This process overwrites the previously stored number. Figure 8-1 shows the menu path used to acc ess the P

1=NETWORK

1=LOCAL 2= DTE OPTIONS

3=TEST OPTI ONS

3=CONFIG STORED NUMB ER

2=REMOTE ENTER 4=DIAL OPTIONS 1=PHONE TO EDIT: (1-10) NNNNNNN

ADDRESS 2=AUTO ANSWER

HONE NUMBER

option.

Figure 8-1. Editing Stored Phone Numbers

61202011L1-1 DSU III AR User Manual 8-1

Chapter 8. Configuring Dial Options

Table 8-1 shows the AT Command for storing phone numbers.

Auto Answer

UTO ANSWER

The A to be answered. If E answered by the DSU III AR. If D answered manually by an AT or V.25 command from the DTE, or by raising TR from the DTE. Figure 8-2 shows the menu path used

to enable or disable this option.

1= LOCAL 2= DTE OPTIONS

3=CONFIG

2= REMOTE ENTER ADDRESS 4= DIAL OPTIONS 2= AUTO ANSWER

Table 8-1. AT Command for Storing Phone Numbers

AT Command Description

&Zn= Store Phone Number

option is used to specify how incoming calls are

NABLED

, incoming calls are automatically

ISABLED

1= NETWORK

3= TEST OPTIONS

, an incoming call can be

1= PHONE

1= DISABLED 2= ENABLED

Figure 8-2. Enabling/Disabling the Auto Answer Function

Table 8-2 shows the AT Commands available for the A

UTO ANSWER

option.

Table 8-2. AT Commands for Auto Answer

Front Panel AT Command Description

1=DISABLED _J0 Auto Answer disabled 2=ENABLED _J1 Auto Answer enabled

8-2 DSU III AR User Manual 61202011L1-1

Chapter 9

Manual Command

MANUAL COMMAND

ANUAL COMMAND

The M configuration and control commands for the DSU III AR.

The first display prompts the user to enter the command number.

COMMAND:00

Figure 9-1 shows the menu path for M

The available manual commands are listed in Table 9-1 on page 9-3.

1= LOCAL 2= DTE OPTIONS

3=CONFIG COMMAND: 00

2= REMOTE ENTER ADDRESS 5= MANUAL COMMAND COMMAND: 00 VALUE: 00

option is a shortcut method for entering

ANUAL COMMAND

1= NETWORK OPT.

3= TEST OPTIONS 4= DIAL OPTIONS

Figure 9-1. Menu Path fo r Manual Command

61202011L1-1 DSU III AR User Manual 9-1

Chapter 9. Manual Command

Using the Front Panel to Enter a Manual Command

When using the front panel, perform the following steps to enter a manual command.

Step Action Explanation

1 Use the nu mbe r key s t o en te r

the hexadecimal command number.

Press

to complete.

Enter

2 The command value can be

edited or reissued with the existing value.

COMMAND: XX VALUE: 00

3 Use the nu mbe r key s t o en te r

the hexadecimal value.

4 Press

to complete. The system briefly displa ys

Enter

When the command number is entered, the display sh o ws both the command number and the present value or setting for the command.

OMMAND ACCEPTED

and returns

to the active menu.

9-2 DSU III AR User Manual 61202011L1-1

Chapter 9. Manual Command

Table 9-1. Manual Commands

Command Description Command Value

AT Command Echo Disable 82 00 Enable 82 01 AT Result code Enable 85 00 Disable 85 01 AT Long or Short code Short form 86 00 to FF Long form 86 00 to FF AT Escape Character 2 00 to FF AT CR Character 3 00 to FF AT LF Character 4 00 to FF AT BS Character 5 00 to FF AT Escape Char. Timer 0C 00 to FF Abort Call Timer 7 00 to FF DTR Recognize Delay (x 2.5ms) 19 00 to FF DTR Initiated Command Time-out (seconds) 28 00 to FF Load Factory Opt. Option Set #1 8A 00 Option Set #2 8A 01 Option Set #3 8A 02 Option Set #4 8A 03 Store User Profile Save to Profile 0 91 00 Save to Profile 1 91 01 Select User Profile Power Up Profile 0 93 00 Power Up Profile 1 93 01 Network Address Lock Network Addr. Unlock C3 00 Network Addr. Lock C3 01

61202011L1-1 DSU III AR User Manual 9-3

Chapter 9. Manual Command

9-4 DSU III AR User Manual 61202011L1-1

Chapter 10

Dial Selection

DIAL OPTIONS

selection available in the M

IAL

The D options for manual dialing, redialing, and dialing stored numbers. The D

IAL

selection is available for use only if AT&T/MCI SW56 or

SW56 is the selected N

US S

on page 5-5 in Chapter 5. Figure 10-1 below shows the menu path used to access these

options.

1= DIAL STORED # Select Stor ed Number 1-A

4=DIAL 2= ENTER DIAL # NNNN NNN

3= REDAIL LAST #

menu (D

AIN

ETWORK TYPE

Figure 10-1. Dial Options Menu

IAL

) includes

. See Network Type

61202011L1-1 DSU III AR User Manual 10-1

Chapter 10. Dial Selection

Dial Stored Number

This option allows a stored number to be dialed. The numbers are stored within the C

ONFIG

selection.

Figure 10- 2 below shows the C

ONFIG

menu path used to access the

dial options and store phone numbers. See Chapter 8 Configuring Dial Options on page 8-1 for more

information.

1= NETWORK TYPE

1= LOCAL 2= DTE OPTIONS

3= TEST OPTIONS

STORED NUMBER

3= CONFIG 4= DIAL OPTIONS 1= PHONE N O. EDIT: (1-10) NNNNNNN

2= REMOTE ENTER 2= AUTO ANSWER

ADDRESS 5= MANUAL

Figure 10-2. Path to Storing Numbers Option

Enter Dial Number

This option allows you to enter a phone number of up to 36 digits for the DSU III AR to dial.

Redial Last Number

Selecting this option redials the last phone number entered.

10-2 DSU III AR User Manual 61202011L1-1

Chapter 11

Testing and Troubleshooting

TEST OVERVIEW

The DSU III AR performs a variety of diagnostic functions that isolate portions of the circuit to identify the problem source. Tests may be initiated and terminated from the front panel or the DTE interface. In asynchronous mode, AT commands can control the testing from the DTE interface. For synchronous operation, V .25 bis commands can provide test control.

The unit also responds to standard DDS network tests initiated from telco test centers. In addition, it can run several tests such as local and remote loopbacks to aid in problem isolation. See Figure 11-1.

DTE DTE

LOCAL

DSU/CSU

TELCO

REMOTE

DSU/CSU

Figure 11-1. Normal Operation Before Initiating Loopback Test

All diagnostic tests disrupt data flow.

61202011L1-1 DSU III AR User Manual 11-1

Chapter 11. Testing and Troubleshooting

Initiating a Test

To initiate tests, perform the following steps:

Step Action

To se lect T

Enter

Specify L

corresponding number; then press

EST

from the main menu, press 2; then press

OCAL

, R

EMOTE

, or AR testing by selecting the

Enter

3 Use the up and down arrows to view test options.

Select a test from the available options by pressing the

corresponding number and then

Enter

The example in Figure 11-2 shows the menu path for initiating a local DTE and Loop test.

1=DTE & LOOP (LL)

2=LOOP ONLY (RT)

1=LOCAL UNIT 3=DTE ONLY

4=DTE WITH TP 5=TEST PATTERN

2=TEST 6=SELF TEST

2=REMOTE UNIT ENTER TEST UNIT

ADDRESS: 0

Figure 11-2. Initiating a Test

Once a test is initiated P

LEASE WAIT

displays briefly and is

followed by the status screen.

11-2 DSU III AR User Manual 61202011L1-1

Test Status Display

EST STATUS

The T

EST STATUS

Chapter 12, V iewing Status Information on page 12-1 with add itional prompts for the type of test and the number of errors (for tests with a test pattern).

Chapter 11. Testing and Troubleshooting

display appears automatically during a test. The

display is similar to the status screen described in

Figure 11-3 shows an example of a T test with a test pattern. Figure 11-4 on page 11-4 shows the complete test menu.

DTE WITH TEST PATTERN TST ERR = 00

LOOP 56K DTE 56K SYNC

TR SR LLB RLB OFF OFF OFF OFF

UNIT IN TEST LOOP IS NORMAL

Exiting a Test

During a test, press the

S T

are available only after a test has been initiated:

TATUS

menu or press

EST/DISPLAY STATUS

EST STATUS DISPLAY

While this menu is on the display:

to clear errors.

Press

to inject an error.

Use the up and down arrows to display other status screens.

for a DTE

Figure 11-3. Sample Test Status Displays

key to access the E

Quick

Cancel

to return to the Main menu. The E

XIT TEST/DISPLAY

XIT

menu provides the following options, which

Exit Test Exits the current test and returns to the Main

menu.

Display Status Reenters test display.

61202011L1-1 DSU III AR User Manual 11-3

Chapter 11. Testing and Troubleshooting

1=DTE & LOOP (LL) STATUS DISPLAY 1=EXIT TEST

2=DISPLAY STATUS

2=LOOP ONLY (RT) STATUS DISPLAY 1=EXIT TEST

2=DISPLAY STATUS

3=DTE ONLY STATUS DISPLAY 1=EXIT TEST

1=LOCAL UNIT 2=DISPLAY STATUS

1=2047 PATTERN

4=DTE WITH TP 2=511 PATTERN 1=EXIT TEST

TEST 3=STRESS PTRN #1 STATUS DISPLAY 2=DISPLAY STATUS

4=STRESS PTRN #2 5=STRESS PTRN #3 6=STRESS PTRN #4

1=2047 PATTERN 2=511 PATTERN 3=STRESS PTRN #1 1=EXIT TEST

5=TEST PATTERN 4=STRESS PTRN #2 STATUS DISPLAY 2=DISPLAY STATUS

5=STRESS PTRN #3 6=STRESS PTRN #4

6=SELF TEST ST ATUS DISPLAY

1=2047 PATTERN 1=EXIT TEST 2=511 PATTERN STATUS DISPLAY 2=DISPLAY STATUS

2=REMOTE UNIT ENTER TEST UNIT 3=STRESS PTRN #1

ADDRESS: 0 4=STRESS PTRN #2

5=STRESS PTRN #3 6=STRESS PTRN #4 7=DATA FROM DTE

Figure 11-4. Complete Test Menu

When the

STATUS DISPLAY

is active, press the

key to access the E

Quick

XIT TEST

menus.

11-4 DSU III AR User Manual 61202011L1-1

TROUBLESHOOTING

This section is intended to provide a quick and easy means of diagnosing suspected problems associated with local or remotely attached ADTRAN DSU/CSUs. Two separate troubleshooting sections are provided; one focuses on new installs, the other on existing circuits.

Messages from the DSU/CSU

The DSU III AR displays messages on the LCD display and LEDs concerning the status of the unit and the local loop. If the Alarm LED is O displayed on the LCD.

, at least one of the messages shown in Table 11-1 will be

Chapter 11. Testing and Troubleshooting

The messages. Press the

menu must be selected in order for the unit to display status

TATUS

Quick

key to return to the main men u, where S

can be selected.

Table 11-1. Messages from the DSU/CSU

Message Meaning Probable Cause Action

LOOP IS NORMAL

OPEN LOOP

NO RX SIGNAL

OOS/OOF FROM NET

Good local loop signal being received from the telco.

Unit not receiving a signal from the telco.

Unit detects sealing current but no data signal from telco.

Unit detects an Out of Service or Out of Frame condition from the telco.

Indicates good local loop.

Bad telco cable from the DSU to telco jack or bad circuit to telco.

Bad conductor in telco cable from DSU to telco jack or bad circuit to telco.

Telco is having problems with DDS circuit or remote unit is turned off or disconnected.

No action required; unit properly connected to telco circuit.

Replace telco cable from DSU to wall jack. If a problem persists, contact telco provider.

Check remote unit. Contact telco service provider. If a problem persists, conta ct telco provider.

TATUS

61202011L1-1 DSU III AR User Manual 11-5

Chapter 11. Testing and Troubleshooting

Table 11-1. Messages from the DSU/CSU (Continued)

Message Meaning Probable Cause Action

CHECK TELCO LINE

TEST FROM TELCO

Transmit/receive pair reversal detected.

Telco activated a loopback to test the DDS circuit.

Telco wall jack wired incorrectly.

Telco is testing circuit. Wait until test is complete or

Troubleshooting New Installs

Before initiating diagnostics on a newly installed unit and/or DDS circuit and before contacting ADTRAN Technical Support, please check the items in Table 11-2 to ensure the unit is configured properly.

After verifying the items listed in Table 11-2 on page 11-7, the unit should operate properly and display the following:

DATA MODE LOOP IS NORMAL

If a status message other than D shown, begin performing diagnostics described in the section Test Sequence for Troubleshooting New Installs or Existing Circuits on page 11-8.

Switch wire pairs in wall jack or contact telco se rvice provider.

contact telco service provider.

ATA MODE LOOP IS NORMAL

11-6 DSU III AR User Manual 61202011L1-1

Chapter 11. Testing and Troubleshooting

Table 11-2. Troubleshooting New Installs

Configuration Item to

Check

Option Selection Action

DTE Type EIA-232 or V.35 Select the type of DTE interface

option to connect to the DSU/ CSU from the configuration menu.

Loop Rate Auto, 2.4 to 64 kbps Select the DDS loop rate of the

DDS circuit from the configuration menu.

Data Format Async or Sync Select the type of data to be used

from the configuration menu.

DTE Cable N/A Verify DTE cable connection to

the proper DTE connector on the DSU/CSU.

Telco Cable N/A Verify the telco ca ble is secure ly

connected to the DSU/CSU and wall jack.

Power the unit Off and then On.

N/A Verify the unit passes self test

during power-up (displayed on the LCD).

61202011L1-1 DSU III AR User Manual 11-7

Chapter 11. Testing and Troubleshooting

Test Sequence for Troubleshooting New Installs or Existing Circuits

If your DSU... Do this...

seems to be having problems Perform a Self Test to determine if the unit is

operational

is receiving excess i ve data er ror s Perform a DTE with Test Pattern requiring re-

transmission to determine if the unit's internal transmitter and receiver is operating error free

is receiving excess ive errors requiring retransmission of data and the remote unit is error free

If an external BERT tester is available, these additional tests may be performed: DTE & Loop Test, DTE Only Test, and Loop Only Test.

If the unit fails any of these tests or the problem has not been determined, contact ADTRAN Technical Support (see page xi in the front section of this manual).

The DSU III AR unit diagnostics tests can be initiated through AT Commands from the DTE interface. These commands are listed in Table 11-3 on page 11-9.

Perform a Remote Test to verify the connection between the local and remote unit is error free. Run the test using all available test patterns

11-8 DSU III AR User Manual 61202011L1-1

Chapter 11. Testing and Troubleshooting

Table 11-3. AT Commands

Command Title Default

A/ Re-execute Command none ATA Answer none ATDn Dial Number none ATE Echo Command 1 ATH Hang Up Call none ATO Go Online none ATQn Result Code Display 0 ATSn? Read S-Register none ATSn=x Write to S-Register none ATVn Result Code From 1 ATZ Reset none AT&Cn DCD Option 0 AT&Dn DTR Option 0 AT&Fn Restore Factor y Op tio ns none AT&Kn Flow Control none AT&Ln N et work Type 0 AT&Qn DTE Data Format 0 AT&Rn CS Options 0 AT&Sn SR Options 0 AT&Tn Test Commands 0 AT&V View Current Configuratio n none AT&Wn Store User Profile 0

61202011L1-1 DSU III AR User Manual 11-9

Chapter 11. Testing and Troubleshooting

LOCAL UNIT DIAGNOSTICS

The local DSU III AR can perform six differ ent tests. These tests can be initiated through AT Commands from the DTE Interface. See Table 11-4 for a list of the AT Commands.

Front Panel Display AT Command Description

DTE & Loop (LL) &T10 TD/RD and RX/TX Loopbacks Loop Only (RT) &T11 RX/TX Loopback at Network Interface DTE Only &T1 TX/RX Loopback at DTE Interface DTE with TP &T8 RX/RX L oopb ac k with T es t Patter n Test Pattern & T 9 Transmit/Receive Test Patter n Self Test Z Check Internal Components ( R es ets

Exit Test &T0 Stops test, returns to data mode TD = Customer Transmit Data

RD = Customer Receive Data TX = Netwo r k Transmit Data RX = Network Receive Data

T able 11-4. Tes t AT Comma nds

Unit)

The test patterns shown in T able 11-5 on page 11-11 are available for the DTE with Test Pattern and Test Pattern tests.

11-10 DSU III AR User Manual 61202011L1-1

Chapter 11. Testing and Troubleshooting

Table 11-5. DTE With Test Pattern Commands

Front Panel

Command

Description

1=2047 PATTERN _T0&T8 Standard 2047 random data pattern. 2=511 PATTERN _T1&T8 Standard 511 rand om data pattern. 3=STRESS PTRN #1 _T2&T8 Stress pat tern with alt ernati ng hig h and

low ones densities. Repeated pattern of 100 octets: 1111 1111; followed by 100 octets: 0000 0000.

4=STRESS PTRN #2 _T3&T8 Stress pat tern with alt ernati ng med ium

and low ones densities. Repeated pattern of 100 octets: 0111 1110; followed by 100 octets: 0000 0000.

5=STRESS PTRN #3 _T4&T8 Stress pattern with medium ones density.

Continuous series of octets: 0011 0010.

6=STRESS PTRN #4 _T5&T8 Stress pattern with low ones density. Con-

tinuous series of octets: 010 0 0000.

61202011L1-1 DSU III AR User Manual 11-11

Chapter 11. Testing and Troubleshooting

DTE and Loop (LL)

Test Description

DTE

Test Purpose

The DTE & L

OOP

test splits the DSU III AR into two separate DTE

and loop interface sections and then loops the receive data of each interface back to its respective transmit data. The DTE & L provides a bidirectional loopback at the DSU/CSU.

Figure 11-5 illustrates the loopback points and the signal paths for this test.

LOCAL

DSU/CSU

DTE Tx

NET Tx

TELCO

DTE Rx

NET Rx

Figure 11-5. DTE & Loop Test

OOP

test

The DTE & Loop test is used for the following purposes:

• Verify integrity of the DTE interface and cable.

• Provide a loopback for network tests.

11-12 DSU III AR User Manual 61202011L1-1

Initiating

Follow the menu path outlined in Figure 11-6 to initiate a DTE &

OOP TEST

2=TEST 6=SELF TEST

Interpreting Test Results

A BERT tester must be used to interpret the test results of a DTE & Loop test because the BERT originates external to the local DSU.

Chapter 11. Testing and Troubleshooting

1=DTE & LOOP (LL)

2=LOOP ONLY (RT) 3=DTE ONLY

1=LOCAL UNIT 4=DTE WITH TP

5=TEST PATTERN

2=REMOTE UNIT

Figure 11-6. Initiating a DTE & Loop Test

61202011L1-1 DSU III AR User Manual 11-13

Chapter 11. Testing and Troubleshooting

Loop Only (RT)

OOP ONLY

The L portion of the DTE interface for the local DSU III AR to be tested from the remote site over the actual communication circuit.

Figure 11-7 illustrates the loopback point and the signal paths for this test.

(RT) test allows the loop interface and a major

LOCAL

DSU/CSU

Test Purpose

DTE

Interface

The L

DTE Tx

DTE Rx

OOP ONLY

NET Tx

TELCO

NET Rx

Figure 1 1-7. Loop Only Test

test is used to provide a loopback for network tests.

11-14 DSU III AR User Manual 61202011L1-1

Initiating

Follow the menu path outlined in Figure 11-8 to initiate a

OOP ONLY

2=TEST 6=SELF TEST

Interpreting Test Results

OOP ONLY

The L telco. No test results are available from the local DSU III AR.

Chapter 11. Testing and Troubleshooting

test.

1=DTE & LOOP (LL)

2=LOOP ONLY (RT)

3=DTE ONLY

1=LOCAL UNIT 4=DTE WITH TP

5=TEST PATTERN

2=REMOTE UNIT

Figure 11-8. Initiating a Loop Only Tes t

test is used for looping the DDS circuit back to the

61202011L1-1 DSU III AR User Manual 11-15

Chapter 11. Testing and Troubleshooting

DTE Only

The DTE O

NLY

test provides a method for testing both the DTE interface drivers and receivers of the local DSU III AR plus its loop transmitter and receiver. For this test, the loop transmit data is connected to the loop receive data at a point close to the physical network interface. This test can be used to verify proper operation between the local DTE and the local DSU III AR. See Figure 11-9.

When this test is implemented, the far unit receives an

OOS/OOF

sage from the network and enters an alarm state.

LOCAL

DTE

DSU/CSU

DTE Tx

NET Tx

TELCO

DTE Rx

NET Rx

mes-

Figure 11-9. DTE Only Test Diagram

Test Purpose

The DTE O

NLY

test is used for the following purposes:

• To verify the integrity of the DTE interface.

• To verify the integrity of connection between DTE and

DSU III AR.

11-16 DSU III AR User Manual 61202011L1-1

Adtran DSU III AR User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

List of Figures

List of Tables