ADTRAN 1200127L1 User manual

DualDSU-DP
OptionModule&Plug-OnBoard
OptionModule PN1200127L1#HS
Plug-OnBoard PN1200128L1
USERMANUAL
61200.128L1-1A
April 1996

901 Explorer Boulevard
P.O. Box 070020
Huntsville, AL 35807
Phone: [phone]
Fax: [phone]
© 1996 ADTRAN, Inc.
All rights reserved.
Printed in USA.

FEDERALCOMMUNICATIONSCOMMISSION
RADIOFREQUENCYINTERFERENCESTATEMENT:
This equipment has been tested and found to comply with the limits for a Class
Adigitaldevice,pursuanttoPart15oftheFCCRules.Theselimitsaredesigned
to provide reasonable protection against harmful interference when the equip-
mentisoperatedinacommercialenvironment.Thisequipmentgenerates,uses,
and can radiate radio frequency energy and, if not installed and used in
accordancewiththeinstructionmanual,maycauseharmfulinterferencetoradio
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.
WARNING: Change or modifications to this unit not expressly approved by the party
responsible for compliance could void the user’s authority to operate the
equipment.

Table of Contents

Table of Contents
61200.128L1-1 Dual DSU-DP User Manual i
Table of Contents
Chapter 1 Introduction
Product Overview............................................................................................... 1
DDS Overview ............................................................................................. 3
Switched 56 Overview ................................................................................ 3
Chapter 2 Installation .................................................................................. 5
Unpack and Inspect ........................................................................................... 5
Shipped by ADTRAN .................................................................................. 5
Adapter Cables ............................................................................................ 5
Provided by Customer ................................................................................ 5
Installing the Option Module ............................................................................ 6
Placement of the Option Module ............................................................... 6
Power Connection ....................................................................................... 6
Attaching the Plug-On Board ...................................................................... 7
Rear Panel ........................................................................................................... 8
DTE Data Connection ........................................................................................ 9
Main DTE Data Connection/Primary DTE ....................................................... 9
Configuration ................................................................................................... 11
Configuration Methods ............................................................................. 12
AT Commands .......................................................................................... 12
V.25 bis Commands.................................................................................. 13
SDLC Option ...................................................................................... 13
Character Format ........................................................................ 13
Command Structure ................................................................... 13
Bi-Sync Option ................................................................................... 14
Character Format .........................................................................14
Command Structure ....................................................................14
Asynchronous Option ........................................................................ 14
Character Format .........................................................................14
Command Structure ....................................................................14
Command Descriptions ..................................................................... 14
Syntax and Possible Responses ......................................................... 15
CIC (Connect Incoming Call) .................................................... 15
CNL (Configuration Local) ........................................................ 16
CNR (Configuraton Remote) ...................................................... 16
Switched 56 Operation ...................................................................... 17
CRN (Call Request with Number)...............................................17
CRS (Call Request Using Stored Number)..................................17

Table of Contents
ii DSU DP User Manual 61200.128L1-1
DIC (Disregard Incoming Call) .................................................. 18
PRN (Program Number) ............................................................. 18
RLN (Request List of Numbers) ................................................. 18
Chapter 3 Operation
Overview ........................................................................................................... 19
Menu Structure.......................................................................................... 19
MenuOperation ......................................................................................... 21
Chapter 4 Configuration
Configuration Overview .................................................................................. 23
Local and Remote Configuration ............................................................. 23
Configuration Menu .................................................................................. 23
Configuring Network Options ........................................................................ 25
Network Options ...................................................................................... 25
Network Rate ............................................................................................. 25
Network Address ....................................................................................... 27
Remote Configuration Option .................................................................. 28
Network Type ............................................................................................ 29
Configuring DTE Options ............................................................................... 30
DTE Rate.................................................................................................... 30
Data Format ............................................................................................... 32
DTE Command Option ............................................................................ 33
Transmit Clock.......................................................................................... 34
CS Options ................................................................................................ 36
Anti-Stream ..................................................................................................... 39
CD Options ............................................................................................... 41
TR Options ................................................................................................ 42
SR Options ................................................................................................ 43
Test Options ..................................................................................................... 44
Test Timeout ............................................................................................. 44
Remote Digital Loopback ......................................................................... 45
Configuring Dial Options ................................................................................ 46
Phone Number .......................................................................................... 46
Auto Answer .............................................................................................. 47
Manual Command ........................................................................................... 48
Chapter 5 Dialing
Dialing Overview .............................................................................................. 51
1. No Call Active ......................................................................... 52
2. Call Is Active ........................................................................... 53
3. Receiving an Incoming Call with Auto Answer Disabled...... 53

Table of Contents
61200.128L1-1 Dual DSU-DP User Manual iii
Chapter 6 Testing & Troubleshooting
Test Overview ................................................................................................... 55
Initiating a Test.......................................................................................... 56
DSU-DP Test Operation ............................................................................ 57
Tests Using the TEST Pattern Generator........................................... 57
Remote Test ........................................................................................ 60
Troubleshooting ............................................................................................... 61
Messages from the DSU/CSU .................................................................. 61
Troubleshooting New Installs................................................................... 62
Test Sequence for Troubleshooting New Installs
or Existing Circuits ............................................................................ 63
Local Unit Diagnostics ..................................................................................... 64
DTE and NET ............................................................................................ 65
Test Description ................................................................................. 65
Test Purpose ....................................................................................... 65
Initiating ............................................................................................. 66
Interpreting Test Results .................................................................... 66
NET Only (RT) .......................................................................................... 67
Test Purpose ....................................................................................... 67
Initiating ............................................................................................. 67
Interpreting Test Results .................................................................... 68
DTE Only................................................................................................... 69
Test Purpose ....................................................................................... 69
Initiating ............................................................................................. 70
Interpreting Test Results .................................................................... 70
DTE with Test Pattern ............................................................................... 71
Test Purpose ....................................................................................... 71
Initiating ............................................................................................. 71
Interpreting Test Results .................................................................... 72
TP to Network ........................................................................................... 73
Test Purpose ....................................................................................... 73
Initiating ............................................................................................. 73
Interpreting Test Results .................................................................... 74
Exit Test ..................................................................................................... 74
Remote Unit Diagnostics ................................................................................. 75
Test Purpose ....................................................................................... 76
Initiating ............................................................................................. 76
Test Results ........................................................................................ 76
Interpreting Test Results .................................................................... 76

Table of Contents
iv DSU-DP User Manual 61200.128L1-1
Chapter 7 Status Selection
STATUS Display ............................................................................................... 77
DSU Operational Status ............................................................................ 78
DDS Network Status ................................................................................. 78
Network Rate ............................................................................................. 79
DTE Rate/Mode ........................................................................................ 79
DTE Control Leads and Status ................................................................. 80
Appendix A AT Commands ........................................................................ 81
Appendix B Default Configuration Profiles .............................................. 83
Default Configuration Profiles......................................................................... 83
Profile 1 ....................................................................................... 83
Profile 2 ....................................................................................... 83
Appendix C DSU to Modem Interconnect ................................................. 85
Modem Tail Circuit Application ...................................................................... 85
Appendix D EIA-232 Connector ................................................................. 87
56 and 64 kbps Application ............................................................................ 87
Appendix E DSU-DP Configuration Menu Tree ........................................ 89
Appendix F Troubleshooting Supplement ................................................. 93
TSU History Buffer Alarms .............................................................................. 93
OUT OF SERVICE (OOS) ........................................................................ 93
DTE Streaming .......................................................................................... 94
When Alarms Clear ................................................................................... 94
Non-Alarm Conditions in History Buffer ........................................................ 94
OCU LB BY CO ........................................................................... 94
CSU LB BY CO ON ..................................................................... 94
DSU LB BY CO ON ..................................................................... 94
IN RDL BY FAR ........................................................................... 94
SLAVED RMT CNF ..................................................................... 94
EIA LLB ON................................................................................. 94
LOCAL TEST ON ........................................................................ 95
REMOTE TEST ON ..................................................................... 95
REMOTE CONF ON ................................................................... 95
TEST OFF .................................................................................... 95
REMOTE CONF OFF.................................................................. 95

Table of Contents
61200.128L1-1 Dual DSU-DP User Manual v
Figures
Figure 1-1 Sample Point-to-Point Application for Dual DSU-DP................... 2
Figure 2-1 Installing the Option Module ....................................................... 6
Figure 2-2 Attaching the Plug-On Board ........................................................ 7
Figure 2-3 DSU-DP Option Module Rear View ............................................. 8
Figure 3-1 TSU 100 Main Menu ................................................................... 20
Figure 4-1 Setting Network Rate Options .................................................... 25
Figure 4-2 Setting the Network Address ...................................................... 27
Figure 4-3 Enabling/Disabling Remote Configuration................................ 28
Figure 4-4 Setting Network Type Options ................................................... 29
Figure 4-5 DTE Rates for 56 or 64 kbps Network Rate ............................... 30
Figure 4-6 Selecting Asynchronous or Synchronous Data Format ............. 32
Figure 4-7 Selecting the DTE Command Option......................................... 33
Figure 4-8 Transmit Clock Options.............................................................. 34
Figure 4-9 Selecting CS Options .................................................................. 36
Figure 4-10 Anti-Stream Options ................................................................... 39
Figure 4-11 Selecting CD Options.................................................................. 41
Figure 4-12 Selecting TR Options .................................................................. 42
Figure 4-13 Setting SR Options ...................................................................... 43
Figure 4-14 Setting Test Timeout Option ....................................................... 44
Figure 4-15 Remote Digital Loopback ........................................................... 45
Figure 4-16 Editing Stored Phone Numbers .................................................. 46
Figure 4-17 Enabling/Disabling the Auto Answer Function.......................... 47
Figure 4-18 Manual Command....................................................................... 48
Figure 5-1 Menu Path to Initiate a Call ........................................................ 51
Figure 6-1 Normal Operation Before Initiating Loopback Test................... 55
Figure 6-2 Initiating a Test ............................................................................ 56
Figure 6-3 Complete Test Menu ................................................................... 58
Figure 6-4 Remote Test Example .................................................................. 60
Figure 6-5 DTE & Net Test ........................................................................... 65
Figure 6-6 Initiating a DTE & Net Test ........................................................ 66
Figure 6-7 Loop Only Test ............................................................................ 67
Figure 6-8 Initiating a Net Only Test ............................................................ 67
Figure 6-9 DTE Only Test Diagram .............................................................. 69
Figure 6-10 Initiating a DTE Only Test .......................................................... 70
Figure 6-11 DTE with Test Pattern ................................................................. 71
Figure 6-12 Initiating a DTE Test with Test Pattern ....................................... 72
Figure 6-13 Test Pattern Only ........................................................................ 73
Figure 6-14 Initiating a Test Using a Test Pattern ...........................................74
Figure 6-15 V.54 RDL with Test Pattern ......................................................... 75
Figure 6-16 Initiating a Remote Test .............................................................. 76
Figure 7-1 Examples of Status Displays ....................................................... 77

Table of Contents
vi Dual DSU-DP User Manual 61200.128L1-1
Figure C-1 DSU to Modem Interconnet ......................................................... 85
Figure D-1 EIA-232 Connector ....................................................................... 87
Figure E-1 DSU-DP Configuration Menu Tree .............................................. 91
Tables
Table 2-A Pin Assignments for Primary EIA-232 Cable ............................... 9
Table 2-B Pin Assignments for Primary V.35 Cable ................................... 10
Table 2-C Configuration Methods .............................................................. 12
Table 4-A Loop Rate Commands ................................................................ 26
Table 4-B Network Address Command ...................................................... 27
Table 4-C Remote Configuration Commands............................................. 28
Table 4-D Network Type Commands .......................................................... 29
Table 4-E DTE Rate AT Commands ............................................................ 31
Table 4-F Data Format Commands ............................................................. 32
Table 4-G Transmit Clock AT Commands .................................................. 34
Table 4-H CS Options AT Commands ........................................................ 37
Table 4-I Short and Long Delays at Different Operating Speeds .............. 38
Table 4-J Anti-Stream AT Commands ........................................................ 40
Table 4-K CD Options AT Commands........................................................ 41
Table 4-L TR Options AT Commands ........................................................ 42
Table 4-M SR Options AT Commands ......................................................... 43
Table 4-N Test Timeout AT Commands ...................................................... 44
Table 4-O Remote Digital Loopback AT Commands .................................. 45
Table 4-P AT Commands for Storing Phone Numbers .............................. 46
Table 4-Q AT Commands for Auto Answer ................................................. 47
Table 4-R Manual Commands ..................................................................... 49
Table 6-A Values for TST ERR=XXXX ......................................................... 58
Table 6-B Messages from the DSU-CSU ..................................................... 61
Table 6-C Troubleshooting New Installs ..................................................... 62
Table 6-D Test AT Commands ..................................................................... 64
Table 6-E Remote Tests and AT Commands ............................................... 75
Table A-A AT Commands ............................................................................. 81
Table A-B Test Pattern Commands .............................................................. 82
Table B-A Default Configuration Profiles .................................................... 84

Chapter 1. Introduction
61200.128L1-1 Dual DSU-DP User Manual 1
Chapter 1
Introduction
PRODUCT OVERVIEW
The ADTRAN Dual DSU-DP provides a reliable, high
speed data connection for customer data terminal
equipment (DTE) through the ADTRAN TSU/HSU DS0
port. It provides compatibility with digital data service
(DDS), or Switched 56 network (SW56) services. The
Dual DSU-DP supports both synchronous and asynchro-
nous data communication over the DDS or Switched 56
networks.
This unit is an all rate DSU, supporting services from 2.4
to 64 kbps including 19.2 and 38.4 kbps services. The
Dual DSU-DP may be used in either point-to-point or
multi-point circuits.
The Dual DSU-DP provides both V.35 and EIA-232
electrical and physical DTE interfaces through either an
ADTRAN HD-to-RS-232 cable (PN 1200167L2) or
ADTRAN HD-to-V.35 cable (PN 1200167L1) to accom-
modate a variety of applications.
In addition to DDS, the unit also supports Switched 56
(4-wire) service with dialing accomplished from either
the front panel or the DTE interface using either the AT
command set or the V.25 BIS command set. This model
is compatible with AT&T Accunet and U.S. Sprint®
SW56 type services.

Chapter 1. Introduction
2Dual DSU-DP User Manual 61200.128L1-1
Figure 1-1 shows a sample point-to-point application for
the Dual DSU-DP.
Figure 1-1
Sample Point-to-Point Application for Dual DSU-DP
ENTER
ENTER
1 2 3
4 5 6
7 8 9
#0
*
CANCEL
CANCEL
SHIFT
SHIFT
SHIFT
SHIFT
D
A
E
B
F
C
RS CS TD RD CDALM TST
RS CS TD RD CDALM TST
DSUIII DBU
DSUIII DBU
F
DDS
Network
Router DSU III AR
56 kbps
Router
TSU/HSU
T1
ENTER
ENTER
1 2 3
4 5 6
7 8 9
#0
*
CANCEL
CANCEL
SHIFT
SHIFT
SHIFT
SHIFT
D
A
E
B
F
C
RS CS TD RD CDALM TST
RS CS TD RD CDALM TST
DSUIII DBU
DSUIII DBU
Up to four
DTE ports
per module
ENTER
ENTER
1 2 3
4 5 6
7 8 9
#0
*
CANCEL
CANCEL
SHIFT
SHIFT
SHIFT
SHIFT
D
A
E
B
F
C
RS CS TD RD CDALM TST
RS CS TD RD CDALM TST
DSUIII DBU
DSUIII DBU
DSU III AR
DSU III AR Router
Router

Chapter 1. Introduction
61200.128L1-1 Dual DSU-DP User Manual 3
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 Dual DSU-DP supports all DDS
service rates yielding DTE rates of 2.4, 4.8, 9.6, 19.2, and
38.4 (sync or async); and 56 and 64 kbps (sync only).
An additional rate of 57.6 kbps is available in async
mode. At the service rates of 56 kbps and 64 kbps, the
unit can be configured to run slower DTE rates (async or
sync).
Switched 56 Overview
This switched Digital Data Service allows customers to
pay for data connection only for the time the circuit is
connected. The regional operating companies or
interexchange carriers provide the service to SW56
customers. In SW56 mode the Dual DSU-DP supports
DTE rates of 2.4, 4.8, 9.6, 19.2, and 38.4 (asynchronous
or synchronous), and 56 kbps (synchronous). An
additional DTE rate of 57.6 kbps is available in async

Chapter 1. Introduction
4Dual DSU-DP User Manual 61200.128L1-1

Chapter 2. Installation
61200.128L1-1 Dual DSU-DP User Manual 5
Chapter 2
Installation
UNPACK AND INSPECT
Carefully inspect the option module or plug-on board for
any shipping damages. If damage is suspected, file a claim
immediately with the carrier and contact ADTRAN
Customer Service. If possible, keep the original shipping
container for use in shipping the Dual DSU-DP for repair
or for verification of damage during shipment.
Shipped by ADTRAN
The following items are included in the ADTRAN ship-
ment:
•The Dual DSU-DP Option Module or Dual DSU-DP
Plug-On Board
•The user manual (to be inserted into the main TSU/HSU
user manual)
Adapter Cables
Two cables must be purchased separately from ADTRAN:
•PN 1200167L1 HD to V.35 (Winchester)
•PN 1200167L2 HD to RS-232 (DB25)
Provided by Customer
The customer must provide a cable for connection to the
DTE device.

Chapter 2. Installation
6Dual DSU-DP User Manual 61200.128L1-1
INSTALLING THE OPTION MODULE
It is not necessary to turn off the power to the TSU/HSU
when installing the option module because it is hot
swappable. The plug-on board must be attached to a hot
swappable option module if you wish to install it while the
TSU/HSU is powered on.
Placement of the Option Module
Figure 2-1 is representative of the action required for
proper placement of the option module. Perform the
following steps to install the option module:
1. Remove the cover plate from the TSU/HSU unit rear
panel.
2. Slide the option module into the rear panel of the
TSU/HSU unit until it is positioned firmly against the
front of the unit.
3.. Fasten the thumbscrews at both edges of the option
module.
Figure 2-1
Installing the Option Module
Power Connection
Each option module derives power from the base TSU/
HSU unit. Power to the TSU/HSU is supplied by a captive
eight-foot power cord.
TSU/HSU
UNIT
Option Module
Cover Plate

Chapter 2. Installation
61200.128L1-1 Dual DSU-DP User Manual 7
Attaching the Plug-On Board
Figure 2-2 is representative of the action required for
proper attachment of a plug-on board to the option
module. Perform the following steps to install the plug-
on board:
1. Hold the plug-on board above the option module.
2. Using a downward and right-to-left motion, slip the
plug-on board connector into the opening in the
option module back panel.
3. Moving the plug-on board downward, secure the
connection of the header pins at the front of the
boards.
4. Install two 4-40 screws at both front edges of the
option module.
5. Install two 4-40 screws on each of the standoffs on
the rear of the plug-on module.
Figure 2-2
Attaching the Plug-On Board
The connection of the header pins between the option module
and the plug-on board must be visually verified. Severe
damage of the equipment can result from an improper
connection.
PORTX.2
PORTX.1
PORTX.4
PORTX.3
HOT
REPLACEABLE
DUALDSU-DP
PORT X.3

Chapter 2. Installation
8Dual DSU-DP User Manual 61200.128L1-1
REAR PANEL
The rear panel contains two high-density subminiature
DTE connectors which provide V.35 or EIA-232 inter-
faces via custom cables. Pin assignments for the DTE
connections are listed in the section DTE Data Connec-
tion in this chapter. The DSU-DP rear panel is shown in
Figure 2-3.
Figure 2-3
DSU-DP Option Module Rear View
PORT X.2
PORT X.1
1 - Cutout for plug-on board interfaces
2 - Screw receptacles for plug-on board
3 - Plug-on board header
1
2
3
2
DUAL DSU-DP
HOT
REPLACEABLE
PORT X.3

Chapter 2. Installation
61200.128L1-1 Dual DSU-DP User Manual 9
DTE DATA CONNECTION
The DT E should be connected to either the EIA-232 DTE
cable or the CCITT V.35 DTE cable. The maximum cable
lengths recommended are 50 feet for the EIA-232, and
100 feet for the CCITT V.35 (note: ADT RAN-adapter
cables are six feet in length). The pin assignments for the
cables are listed in Tables 2-A and 2-B.
The V.35 cable is recommended for use with data rates
above 19.2 kbps. The EIA-232 cable works up to 56 kbps
with a low capacitance cable or with the external transmit
clock option selected. The DTE rate may be configured
from the front panel or via the T-Watchª Management
Program. The DT E can operate in asynchronous or
synchronous modes.
To prevent possible radio frequency interference emissions, a
shielded cable is required.
HD* Pin # Pin # EIA Description
1 1 AA Protective Ground (PG)
2 2 BA TransmitData (TD)
3 3 BB Receive Data (RD)
4 4 CA Request to Send (RS)
5 5 CB Clear to Send (CS)
6 6 C C Data Set Ready (SR)
7 7 AB Signal G round (SG )
8 8 CF Received Line Signal Detector (CD)
1 5 1 5 DB Transmit Clock (TC)
16 17 DD Receive Clock (RC)
18 18 - Local Loopback (LL)
20 2 0 CD Data Terminal Ready (TR)
17 2 2 CE Ring Indicator (RI)
14 2 4 DA External TX Clock (ETC)
1 9 2 5 - Test Indicator (TI)
* HD = High Density
Table 2-A
Pin Assignments for Primary EIA-232 Cable

Chapter 2. Installation
10 Dual DSU-DP User Manual 61200.128L1-1
Table 2-B
Pin Assignments for Primary V.35 Cable
Description
ing Indicator (RI)
ocal Loopback (LL)
HD Pin # P i n CCITT
1 A 101 Protective G round (PG )
7 B 1 0 2 Signal Ground (SG)
4 C 105 Request to Send (RS)
5 D 106 Clear to Send (CS)
6 E 107 Data Set Ready (SR)
8 F 109 Received Line Signal Detector (CD)
20 H - Data Terminal Ready (TR)
17 J - R
18 L - L
11 R 104 Received Data (RD-A)
12 T 104 Received Data (RD-B)
24 V 115 Receiver Signal Element Timing (SCR-A)
25 X 1 15 Receiver Signal ElementTiming (SCR-B)
9 P 103 Transmitted Data (SD-A)
10 S 103 Transmitted Data (SD-B)
22 Y 114 Transmitter Signal Element Timing (SCT-A)
23 AA 114 Transmitter Signal Element Timing (SCT-B)
13 U 113 External TX Signal Element(SCX-A)
26 W 113 External TX Signal Element(SCX-B)
1 9 K, NN - Test Indicator (TI)