Adtran Dual DSU III Module User Manual

Dual DSU-DP
Option Module & Plug-On Board
Option Module PN 1200127L1#HS
Plug-On Board PN 1200128L1
USER MANUAL
61200.128L1-1A April 1996
901 Explorer Boulevard
Huntsville, AL 35807
Phone: (205) 971-8000
Fax: (205) 971-8699
© 1996 ADTRAN, Inc.
All rights reserved.
Printed in USA.
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 interference when the equip­ment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio 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
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
61200.128L1-1 Dual DSU-DP User Manual i
Table of Contents
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
ii DSU DP User Manual 61200.128L1-1
Table of Contents
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
61200.128L1-1 Dual DSU-DP User Manual iii
Table of Contents
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
iv DSU-DP User Manual 61200.128L1-1
Table of Contents
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
61200.128L1-1 Dual DSU-DP User Manual v
Table of Contents
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 ........................................................ 4 0
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
vi Dual DSU-DP User Manual 61200.128L1-1
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 asynchro­nous data communication over the DDS or Switched 56 networks.
Chapter 1. Introduction
Chapter 1
Introduction
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 accom­modate 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.
61200.128L1-1 Dual DSU-DP User Manual 1
Chapter 1. Introduction
ENTER
CANCEL
SHIFT
SHIFT
RS CS TD RD CD ALM TST
DSU III DBU
ENTER
CANCEL
SHIFT
SHIFT
RS CS TD RD CD ALM TST
DSU III DBU
ENTER
CANCEL
SHIFT
SHIFT
RS CS TD RD CD ALM TST
DSU III DBU
Figure 1-1 shows a sample point-to-point application for
the Dual DSU-DP.
DSU III AR
DSU III DBU
ENTER
RS CS TD RD CD ALM TST
CANCEL
Up to four DTE ports per module
TSU/HSU
F
DDS
Network
T1
DSU III DBU
ENTER
RS CS TD RD CD ALM TST
CANCEL
Router DSU III AR
DSU III AR
Router
C 1 2 3 DAEBF 4 5 6
7 8 9
SHIFT
SHIFT
#0
*
DSU III DBU
ENTER
RS CS TD RD CD ALM TST
CANCEL
56 kbps
C 1 2 3 DAEBF 4 5 6
7 8 9
SHIFT
SHIFT
#0
*
Router
Sample Point-to-Point Application for Dual DSU-DP
C 1 2 3 DAEBF 4 5 6
7 8 9
SHIFT
SHIFT
#0
*
Router
Figure 1-1
2 Dual DSU-DP User Manual 61200.128L1-1
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
61200.128L1-1 Dual DSU-DP User Manual 3
Chapter 1. Introduction
4 Dual DSU-DP User Manual 61200.128L1-1
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
Chapter 2. Installation
Chapter 2
Installation
The following items are included in the ADTRAN ship­ment:
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.
61200.128L1-1 Dual DSU-DP User Manual 5
Chapter 2. Installation
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.
Cover Plate
TSU/HSU
UNIT
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.
6 Dual DSU-DP User Manual 61200.128L1-1
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 plug­on 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.
Chapter 2. Installation
P
O
R
T
X
.
3
P
O
R
T
X
.4
D
U
A
L
D
S
U
-D
P
P
O
R
T
X
.
1
P
O
R
H
T
O
X
T
.
2
R
E
P
L
A
C
E
A
B
L
E
PORT X.3
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.
61200.128L1-1 Dual DSU-DP User Manual 7
Chapter 2. Installation
REAR PANEL
The rear panel contains two high-density subminiature DTE connectors which provide V.35 or EIA-232 inter­faces 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.
3
2
HOT REPLACEABLE
PORT X.1
DUAL DSU-DP
PORT X.2
1 - Cutout for plug-on board interfaces 2 - Screw receptacles for plug-on board 3 - Plug-on board header
DSU-DP Option Module Rear View
2
PORT X.3
1
Figure 2-3
8 Dual DSU-DP User Manual 61200.128L1-1
DTE DATA CONNECTION
The DTE 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 C C IT T 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 DT E 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.
Chapter 2. Installation
Table 2-A
Pin Assignments for Primary EI A-232 Cable
HD* Pin # Pin # EIA Description
1 1 AA Protective Ground (PG) 2 2 BA Transmit Data (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 Ground (SG)
8 8 CF Received Line Signal Detector (CD) 15 15 DB Transmit Clock (TC) 16 17 DD Receive Clock (RC) 18 18 - Local Loopback (LL) 20 2 0 C D Data Terminal Ready (TR) 17 2 2 CE Ring Indicator (RI) 14 24 DA External TX Clock (ETC) 19 25 - Test Indicator (TI)
* HD = High Density
61200.128L1-1 Dual DSU-DP User Manual 9
Chapter 2. Installation
Table 2-B
Pin Assignments for Primary V.35 Cable
HD P in # P i n CCITT
1 A 10 1 Protective Ground (PG) 7 B 102 Signal G round (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 1 0 4 Received Data (RD-B) 24 V 115 Receiver Signal Element Timing (SCR-A) 25 X 115 Receiver Signal Element Timing (SCR-B)
9 P 1 03 Transmitted Data (SD-A) 10 S 1 03 Transmitted Data (SD-B) 22 Y 1 1 4 Transmitter Signal Element Timing (SCT-A) 23 AA 114 Transmitter Signal Element Timing (SCT-B) 13 U 1 1 3 External TX Signal Element (SCX-A) 26 W 113 External TX Signal Element (SCX-B) 19 K, NN - Test Indicator (TI)
ing Indicator (RI)
ocal Loopback (LL)
Description
10 Dual DSU-DP User Manual 61200.128 L1-1
CONFIGURATION
The Dual DSU-DP option module contains two different user profiles (sets of configuration options) that are stored in read only memory. T hese profiles are listed in the appendix Default Configuration Profiles. The unit is shipped from the factory with profile 1 ( default configura­tion) loaded into the nonvolatile configuration memory. If profile 1 matches the desired system requirements, no additional configuration is required to put the unit into service. If profile 1 does not match the desired system requirements, modify the default configuration or select another profile more closely matching the desired con-
figuration and modify
When a new profile is loaded or the existing profile is modified, it is stored in the nonvolatile configuration memory. The Dual DSU-DP is then configured with that profile every time power is turned on or reset.
Chapter 2. Installation
See the section Manual Command in the Configuration chapter for information on loading default configuration profiles.
61200.128L1-1 Dual DSU-DP User Manual 11
Chapter 2. Installation
Configuration Methods
The Dual DSU-DP provides methods for both local and
emote configuration. These methods are shown in Table
2-C and are discussed in the following sections.
METHOD STAND ALONE
AT Commands Yes Yes V.25 Commands Yes Yes Front Panel Yes Yes
r
DATAM ATE N o Yes VT 100 No Yes
AT Commands
The Dual DSU-DP can be configured and controlled with in-band AT commands from an asynchronous DT E port just as modems are.
Table 2-C
Configuration Methods
Local Remote
To exit the data mode and enter the command mode, the asynchronous DT E device must transmit a proper escape sequence or three pluses (+++) to the Dual DSU-DP. A specified time delay must occur between the last data character and the first escape sequence character. T his is the guard time delay, and it can be changed by writing a value to the S12 register. The default value for the guard time is one second. For a valid escape sequence to occur, the DT E 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 Dual DSU-DP to configure most of the options or initiate tests to check both the Dual DSU­DP and the network connections. All command lines must begin with the AT character set in either capital or lower case letters.
12 Dual DSU-DP User Manual 61200.128 L1-1
The command line may contain a single command 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 Dual DSU-DP upon receipt of a terminating character. T he 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 (ASC I I 008) to erase errors so the proper commands can be entered. Valid AT commands for the Dual DSU-DP are listed in the appendix AT Commands.
V.25 bis Commands
When configured for the V.25 bis option, the Dual DSU­DP accepts in-band dialing and configuration commands from both synchronous and asynchronous DT E ports.
Chapter 2. Installation
The V.25 bis option supports the following protocols:
¥ SDLC (Synchronous Data Link Control) ¥ BI-SYN C ¥ ASYNC HRONOUS
SDLC Option
Character Format
¥ Data bits - 8 ¥ Parity bit - Ignored
Command Structure
[F][A][C][V.25 bis COMMAND][FCS][F]
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. T he 03H in the control field indicates that other frames are to follow while the 13H in the control field indicates the final frame.
61200.128L1-1 Dual DSU-DP User Manual 13
Chapter 2. Installation
Bi-Sync Option
Asynchronous Option
Character Format
¥ Data bits - 7 ¥ Parity bit - Odd
Command Structure
[SYN][SYN][STX][V.25 bis COMMAND][ETX]
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
14 Dual DSU-DP User Manual 61200.128 L1-1
Chapter 2. Installation
ADTRAN V.25 bis command set follows: CI C Connect incoming call
CNL C onfiguration local CNR C onfiguration remote CRN C all request with number CRS C all request using stored number DI C Disregard incoming call PRN Program number RLN Request list of numbers
The following list contains possible responses to V.25 bis commands:
V A L Valid V.25 command processed CFIET Call failed on switched network - busy
detected
CFIDE Call failed on switched network - no wink
detected
CFINS C all failed - no dial string in specified
register INVCU Unknown command detected INVPS Invalid parameter syntax INVPV Invalid parameter value INVBL Invalid local password INVBM Invalid remote password INC Incoming call CNX C all connected
If verbose (wordy) responses are disabled (ATV0), the following list of three-character responses are the only ones returned:
V A L Valid V.25 command processed INV Invalid command received CFI Call failed INC Incoming call CNX C all connected
61200.128L1-1 Dual DSU-DP User Manual 15
Chapter 2. Installation
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
CNL (Configuration Local)
This command is used to pass AT commands to the local modem via the V.25 bis command processor. T his allows the Dual DSU-DP to be configured with AT commands via a synchronous interface. T he command has the following format:
CNL[LOCAL PASSWORD;]AT[ONE OR MORE AT COMMANDS]
A local password may not be required depending on the present configuration of the unit. Responses to CNL commands are returned in the data format currently configured. Possible responses include VAL and I NVn.
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. T his allows a remote Dual DSU-DP to be configured from a synchronous interface. The commandÕs
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 I NVn.
16 Dual DSU-DP User Manual 61200.128 L1-1
Switched 56 Operation
CRN (Call Request with Number)
When the Dual DSU-DP is configured for SW 56 opera­tion, the CRN command causes the DSU to dial the supplied number. T he commandÕs 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 Dual DSU-DP responds with the call failure indica­tion C FINS ( C all Failure Indication Not Stored).
For a DBU unit, this command initiates dialing on the backup circuit. I f the number supplied contains non­dialable digits, they 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 Dual DSU-DP to dial the number stored in the specified register. The format of this command is as follows:
Chapter 2. Installation
CRS[OPTIONAL SPACE][REGISTER NUMBER 1­10]
If this command is issued without the register number parameter, the INVPS ( Invalid Parameter Syntax) 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 C FIxx.
61200.128L1-1 Dual DSU-DP User Manual 17
Chapter 2. Installation
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. There 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. The command 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. T he characters 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, P, T, and & are valid dial characters. If no digits are issued with this command, the specified register is cleared. T he DSU responds with VAL.
RLN (Request List of Numbers)
This command causes the Dual DSU-DP 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 INV PV 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 Dual DSU-DP responds with a list of all the registers and the stored numbers. T his list is followed by the VAL response.
18 Dual DSU-DP User Manual 61200.128 L1-1
OVERVIEW
Menu Structure
Chapter 3. Operation
Chapter 3
Operation
The Dual DSU-DP Option Module and Plug-On Board are both controlled as part of the TSU/HSU using the methods described in their respective manuals.
Refer to the appropriate TSU/HSU User Manual for descriptions of front panel indicators and buttons.
The TSU 100 menu tree is used for illustrative purposes.
When an option module or plug-on board is installed in the TSU/HSU, the unit adds it to the list of available options under the various Port menu items. These menu items are printed in bold italic letters in the limited overview of the TSU 100 menu shown in Figure 3-1 (complete menu diagram is found in each TSU/HSU User Manual). The TSU 100 is used as an example of the TSU/HSU units.
61200.128L1-1 Dual DSU-DP User Manual 19
Chapter 3. Operation
TSU 100 MAIN MENU
1)STATUS
2)CONFIG
3)UTIL
4)TEST
1)NETWORK (NI)
2)UNIT
3)MAP XCHNG
4)MAP IN USE A (B)
5)DS0 MAP A
6)DS0 MAP B
7)PORT CONFIG
1)NETWORK TESTS
2)RUN SELF TEST
3)PORT TEST
4)CANCEL TEST
1)NI PERF REPORTS
2)NI ERRORS
3)ACTIVE ALARMS
4)VIEW HISTORY
5)PORT STATUS
1)TIME/DATE
2)FACTORY RESTORE
3)SET PASSCODE
4)UNIT ID
5)SOFTWARE REV
6)PORT UTILITY
Figure 3-1
TSU 100 Main Menu
The Dual DSU-DP menus are all submenus found under TSU/HSU menu items:
1)STATUS -> 5)PORT STATUS
2)CONFIG -> 7)PORT CONFIG
3)UTIL -> 6)PORT UTIL
4)TEST -> 3)PORT TEST
When accessing PORT, CONFIG, or TEST submenus, the DSU-DP port must be selected, then remote or local must be selected.
20 Dual DSU-DP User Manual 61200.128L1-1
Menu Operation
Chapter 3. Operation
The Dual DSU-DP menus are accessed from and operate the same as menus for the TSU 100. Each of the Dual DSU-DP submenu items are discussed in this manual.
Operation
With the cursor on one of the four Main menu choices:
Press: ENTER or the number key Results: Display of the first two submenu items with
the cursor on the first item Use: The down scroll key to place the cursor on
the desired item Press: ENTER Results: Display of the first two submenu choices
61200.128L1-1 Dual DSU-DP User Manual 21
Chapter 3. Operation
22 Dual DSU-DP User Manual 61200.128L1-1
CONFIGURATION OVERVIEW
Local and Remote Configuration
The DSU-DP option module and/or plug-on board (DSU-DP) can be configured locally using the front panel or remotely by establishing communications with another ADTRAN DSU product. The front panel of the local TSU/HSU can also be used to configure the remote DSU. During remote configuration, the DSU-DP prompts for the remote address before continuing to the Configuration (CONFIG) menus.
Chapter 4. Configuration
Chapter 4
Configuration
Configuration Menu
The Configuration menu consists of five sub-menus relating to a specific interface or function of the DSU-DP that requires setup. These functions and their corre­sponding functions are:
1) Network Options: Network Interface Parameters
2) DTE Options: DTE Interface Parameters
3) Test Options: Test Parameters
4) Dial Options: Dialing Parameters
5) Manual Commands: Specialty commands reserved
for experienced DSU operators
61200.128L1-1 Dual DSU-DP User Manual 23
Chapter 4. Configuration
The DSU-DP contains two different user profiles (sets of configurations options) that are stored in read only memory (see the appendix, Default Configuration Profiles). 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, no additional configuration is required to put the unit into service. If profile 1 does not match system requirements, it can be modified, or the other profile 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-DP is then configured with that profile every time power is turned on or until the unit is reset.
A complete Dual DSU-DP Configuration menu tree is found in the appendix Dual DSU-DP Configuration Menu
Tree.
24 Dual DSU-DP User Manual 61200.128L1-1
CONFIGURING NETWORK OPTIONS
:
Network Options
The NETWORK OPTIONS configuration parameters control the network operation of the DSU-DP.
Network Rate
The Network Rate option sets the network operating speed. The unit should be set to the rate required by the DDS Service. The DSU DP also supports subrate DTE data over a 56 kbps or 64 kbps loop. The network rate must be set independently of the DTE rate.
Seven network rate selections are available (see Figure 4-1).
1)NETWORK OPTS
1)LOCAL
5)PORT CONFIG
PORT: 0.1 NX56/64 PORT: 1.2 DSU-DP 4)DIAL OPTIONS
PORT: 1.1 DSU-DP 5)MANUAL COMMAND
2)REMOTE ENTER ADDRESS
2)DTE OPTIONS
3)TEST OPTIONS
Chapter 4. Configuration
2.4K
4.8K
1)NETWORK RATE
2)NETWORK ADDR:
3)REMOTE CONFIG:
4)NETWORK TYPE:
9.6K
19.2K
38.4K 56K
64K
Figure 4-1
Setting Network Rate Options
61200.128L1-1 Dual DSU-DP User Manual 25
Chapter 4. Configuration
Network commands are provided in Table 4-A.
Table 4-A
Loop Rate Commands
Front Panel AT Command
2.4K % B 1
4.8K % B 2
9.6K % B 3
19.2K % B 4
38.4K % B 5 56K % B 6 64K clear channel % B 7
26 Dual DSU-DP User Manual 61200.128L1-1
Network Address
X
A two-digit decimal address can be assigned to each DSU-DP. This addressing capability makes it possible to perform remote configuration and testing in point-to­point and multi-drop networks. Figure 4-2 shows the menu path used to change the network address. The factory default setting is 0.
Chapter 4. Configuration
1)NETWORK RATE:
1)NETWORK OPT.
1)LOCAL 3)REMOTE CONFIG:
5)PORT CONFIG 4)NETWORK TYPE: PORT: 0.1 NX56/64
PORT: 1.2 DSP-DP 3)TEST OPTIONS PORT: 1.1 DSP-DP 4)DIAL OPTONS
2)REMOTE 2)DTE OPTIONS
5)MANUAL COMMAND
2)NETWORK ADDR: X
Figure 4-2
Setting the Network Address
Table 4-B shows the AT command used to set the network address Table 4-B
Table 4-B
Network Address Command
Front
Panel
XX (Decimal) _N=xx Assigns a 2 digit Network Address
AT
Command
Description
61200.128L1-1 Dual DSU-DP User Manual 27
Chapter 4. Configuration
Remote Configuration Option
This option sets up the DSU-DP to accept or reject remote configuration commands. Figure 4-3 shows the menu path for enabling/disabling remote configura­tion. The factory default setting is ENABLED.
1)NETWORK OPT.
5)PORT CONFIG
PORT: 0.1 NX56/64 2)DTE OPTIONS
1.2 NX56/64
1.1 NX56/64 4)DIAL OPTIONS
1)LOCAL
2)REMOTE
3)TEST OPTIONS
5)MANUAL COMMAND
Table 4-C shows the equivalent AT commands used to enable or disable remote configuration.
1)NETWORK RATE:
2)NETWORK ADDR:
DISABLED
3)REMOTE CONFIG: ENABLED
4)NETWORK TYPE:
Figure 4-3
Enabling/Disabling Remote Configuration
Table 4-C
Remote Configuration Commands
Front Panel
AT
Command
Description
DISABLE &P4 Disable Remote Configuration ENABLE &P5 Enable Remote Configuration
28 Dual DSU-DP User Manual 61200.128L1-1
Network Type
Chapter 4. Configuration
This option configures the DSU-DP for the specific type of network being used. The factory default setting is DEDICATED (see Figure 4-4).
1)NETWORK RATE:
1)NETWORK OPT.
2)NETWORK ADDR:
3)REMOTE CONFIG:
5)PORT CONFIG
PORT: 0.1 NX56/64 PORT: 1.2 DBU-DP 3)TEST OPTIONS PORT: 1.1 DBU-DP 4)DIAL OPTIONS
1)LOCAL
2)REMOTE
2)DTE OPTIONS
5)MANUAL COMMAND
4)NETWORK TYPE: DEDICATED
Setting Network Type Options
Table 4-D shows the equivalent AT commands that perform the same configuration functions.
Network Type Commands
Front Panel
AT
Command
Description
DEDICATED &L0 Any 4-wire DDS Network AT&T/MCI SW 56 &L1 AT&T/MCI Switched 56 Service US SPRINT SW 56 &L2 US SPRINT Switched 56 Service
AT&T/MCI SW56 US SPRINT SW56
Figure 4-4
Table 4-D
61200.128L1-1 Dual DSU-DP User Manual 29
Chapter 4. Configuration
CONFIGURING DTE OPTIONS
The DTE OPTIONS menu is used to select the configu­ration parameters that control the operation of the DSU­DP DTE Interface such as the DTE rate, data format, DTE command options, transmit clock, CS options, anti­stream, and CD options.
DTE Rate
The selectable DTE rates over a 56 or 64 kbps network are shown in Figure 4-5. If a slower network rate is selected, the DTE rate automatically matches the network rate. If an attempt is made to set the DTE rate for network rates slower than 56 kbps, the DSU-DP will automatically change the option setting to SAME AS NET. The factory default setting is 56K.
If asynchronous mode is set, the 56K option is actually 57.6 kbps.
2.4K
1)NETWORK OPTS 9.6K
1)DTE RATE: 38.4K
1=LOCAL 3)DTE CMD OPTION:
5)PORT CONFIG 5)CS OPTIONS:
PORT: 0.1 NX56/64 2=REMOTE 6)ANTI-STREAM: PORT: 1.2 DSU-DP 7)CD OPTIONS: PORT: 1.1 DSU-DP 8)TR OPTIONS:
2)DTE OPTIONS 4)TRANSMIT CLOCK:
3)TEST OPTIONS
4)DIAL OPTIONS
5)MANUAL OPTIONS
2)DATA FORMAT: SAME AS NET
9)SR OPTIONS:
4.8K
19.2K
56K
64K 64K SCRAMBLED
Figure 4-5
DTE Rates for 56 or 64 kbps Network Rate
The equivalent AT commands for setting the DTE rate for a 56 kbps or 64 kbps are shown in Table 4-E.
30 Dual DSU-DP User Manual 61200.128L1-1
Chapter 4. Configuration
Table 4-E
DTE Rate AT Commands
Front Panel
AT
Command
Description
DTE 2.4K %K3 DTE rate 2.4K sync and async DTE 4.8K %K4 DTE rate 4.8K sync and async DTE 9.6K %K5 DTE rate 9.6K sync and async DTE 19.2K %K6 DTE rate 19.2K sync and async DTE 38.4K %K7 DTE rate 38.4K sync and async DTE 56K %K8 DTE rate 56K sync or 57.6 async 64K %K9 - F0 DTE rate 64K 64K SCRAMBLER %K9 - F1 DTE rate 64K with data scrambler enabled
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 64K SCRAMBLER option should be selected for both the local and remote DSU.
61200.128L1-1 Dual DSU-DP User Manual 31
Chapter 4. Configuration
Data Format
The DATA FORMAT option is used to select either the synchronous or asynchronous mode of operation for the DTE interface. The factory default setting is SYN­CHRONOUS (see Figure 4-6). If asynchronous is chosen, the length of the data bytes must be selected.
1)NETWORK OPTS 1)DTE RATE:
2)DATA FORMAT: SYNCHRONOUS
2)DTE OPTIONS ASYNC 10 BITS
1)LOCAL 4)TX CLOCK:
5) PORT CONFIG 6)ANTI-STREAM:
PORT: 0.1 NX56/64 2)REMOTE 7)CD OPTIONS: PORT: 1.2 DSU-DP 8)TR OPTIONS: PORT: 1.1 DSU-DP 9)SR OPTIONS:
3)TEST OPTIONS
4)DIAL OPTIONS
5)MANUAL COMMAND
Selecting Asynchronous or Synchronous Data Format
3)DTE CMD OPTION: ASYNC 11 BITS
5)CS OPTIONS:
ASYNC 9 BITS
Figure 4-6
Table 4-F shows the AT commands that can be used to set the DATA FORMAT.
Table 4-F
Data Format Commands
Front
Panel
For asynchronous options, select the length of the data bytes. SYNCHRONOUS &Q2 Always synchronous ASYNC 9 BITS &Q0 ASYNCH with 9 bits including start, stop, parity ASYNC 10 BITS &Q0 ASNYCH with 10 bits including start, stop, parity ASYNC 11 BITS &Q0 ASYNCH with 11 bits including start, stop, parity
AT
Command
Description
For AT command set, the async word length must be set via the front panel.
32 Dual DSU-DP User Manual 61200.128L1-1
DTE Command Option
The DTE COMMAND 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 4-7).
Chapter 4. Configuration
1)NETWORK OPTS
2)DTE OPTIONS V.25 SYNC
1=LOCAL 4)TX CLOCK:
5)PORT CONFIG 6)ANTI-STREAM:
PORT: 0.1 NX56/64 2=REMOTE 7)CD OPTIONS: PORT: 1.2 DSU-DP 8)TR OPTIONS:
PORT: 1.1 DSU-DP 9)SR OPTIONS:
3)TEST OPTIONS
4)DIAL OPTIONS
5)MANUAL COMMAND
1)DTE RATE:
2)DATA FORMAT:
3)DTE CMD OPTION: DISABLED
5)CS OPTIONS:
Selecting the DTE Command Option
When the unit is in DTE CMD OPTION mode (idle in SW56 mode, forced with TR option, or from escape sequence in AT mode) with AT COMMAND SET or V.25 SYNC selected, the DTE format is independent of the DATA FORMAT option. However, if V.25 BSC/ASYNC is selected, the unit will use V.25 BISYNC (BSC) commands for synchronous data format or V.25 ASYNC commands for asynchronous data format.
AT COMMAND SET
V.25 BSC/ASYNC
Figure 4-7
61200.128L1-1 Dual DSU-DP User Manual 33
Chapter 4. Configuration
4
Transmit Clock
The TRANSMIT CLOCK option is used to select the source of the clock used to transfer data from the DTE into the DSU-DP. Figure 4-8 shows the menu path used to set the TRANSMIT CLOCK option.
1)NETWORK OPTS
2)DTE OPTIONS EXTERNAL
1)LOCAL 6)ANTI-STREAM:
5)PORT CONFIG 8)TR OPTIONS:
PORT: 0.1 NX56A/6 PORT: 1.2 DSU-DP 3)TEST OPTIONS
PORT: 1.1 DSU-DP 4)DIAL OPTIONS
2)REMOTE 9)SR OPTIONS:
5)MANUAL COMMAND
1)DTE RATE:
2)DATA FORMAT:
3)DTE CMD OPTION:
4)TX CLOCK: NORMAL
5)CS OPTIONS:
7)CD OPTIONS:
Transmit Clock Options
Table 4-G shows the AT commands used to set the Transmit Clock option.
Transmit Clock AT Commands
Front Panel
AT
Command
Description
NORMAL &X0 TX clock from DSU selected EXTERNAL &X1 ETC clock from DTE selected
Figure 4-8
Table 4-G
The EXTERNAL clock option is normally used in modem tail circuit applications. A DSU-to-modem interconnect diagram for this application is shown in the appendix, DSU-to-Modem Interconnect.
34 Dual DSU-DP User Manual 61200.128L1-1
Chapter 4. Configuration
The EXTERNAL 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 the appendix, EIA-232 Connector. Using this option and a special cable eliminates data errors caused by excessive delays in the DTE transmit clock receiver and transmit data driver.
61200.128L1-1 Dual DSU-DP User Manual 35
Chapter 4. Configuration
CS Options
The CS (clear to send) OPTIONS menu is used to select one of seven different control modes for the CS lead. Figure 4-9 shows the menu path used to access the CS OPTIONS menu. The default factory setting is FOLLOWS RS with CS DELAY SHORT.
1)NETWORK OPTS 1)DTE RATE:
2)DTE OPTIONS 3)DTE CMD OPTION:
1)LOCAL 5)CS OPTIONS: FORCED ON
5)PORT CONFIG 7)CD OPTIONS: FOLLOW RS LONG
PORT: 0.1 NX56/64 2)REMOTE 8)TR OPTIONS: FOLLOW CD PORT: 1.2 DSU-DP 9)SR OPTIONS: FOLLOW RS+CD S PORT: 1.1 DSU-DP 3)TEST OPTIONS FOLLOW RS+CD L
4)DIAL OPTIONS OFF WITH LOC D
5)MANUAL COMMAND
2)DATA FORMAT:
4)TRANSMIT CLOCK:
6)ANTI-STREAM: FOLLOW RS SHRT
Figure 4-9
Selecting CS Options
If one of the options chosen involves request to send (RS), then the delay from RS to CS must be selected. Table 4-H shows the AT Commands used to set the CS OPTIONS.
36 Dual DSU-DP User Manual 61200.128L1-1
Chapter 4. Configuration
p
p
Table 4-H
CS Options AT Commands
Front
Panel
AT
Command
Description
FORCED ON &R0 CS always on. FOLLOWS RS SHRT &R1/_D0
CS on with RS after delay; off when RS or if DSU cannot pass data.
FOLLOW RS LONG &R1/_D1
Same as FOLLOW RS SHRT
FOLLOW CD &R2 CS off when CD goes off or if DSU
cannot
ass data.
FOLLOWS RS+CD S &R3/_D0 CS follows RS after delay and also
off if CD off. If CD goes off after RS is on, DSU _DP will turn off CS but continue to pass data until RS goes off. CS also off if DSU cannot
ass data.
FOLLOW RS+CD L &R4/_D1
Same as FOLLOW RS+CD S
OFF WITH LOCD &R4 Off 5 sec after LOCD (loss of
carrier detect). Valid only in SW56 mode. CS is forced on but will turn off for 5 seconds after a call is disconnected.
61200.128L1-1 Dual DSU-DP User Manual 37
Chapter 4. Configuration
Specified times for the short and long delays at the different operating speeds are shown in Table 4-I.
Table 4-I
Short and Long Delays
at Different Operating Speeds
Rate
64K 1.1ms 16.1ms 56K 1.1ms 16.1ms
38.4K 1.5ms 16.5ms
19.2K 1.5ms 16.5ms
9.6K 1.5ms 16.5ms
4.8K 1.9ms 16.9ms
2.4K 3.8ms 18.8ms
Short
Option
Long
Option
Tolerance
±.4ms ±.4ms ±.4ms ±.4ms ±.4ms ±.7ms
±1.3ms
38 Dual DSU-DP User Manual 61200.128L1-1
Anti-Stream
Chapter 4. Configuration
The ANTI-STREAM option is used to select the anti­stream timeout. Figure 4-10 shows the menu path used to access the ANTI-STREAM options menu. The anti­stream timeout is the maximum time the DSU-DP transmits data into the network from the DTE. This feature prevents one DTE device on a multi-drop network from continuously tying up the transmit circuit back to the master DSU.
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 timeout expires, the DSU-DP stops transmitting DTE data into the network but continues to accept data from it. This condition exists until the DTE deactivates the RS input.
1)NETWORK OPTS 1)DTE RATE:
2)DTE OPTIONS 5)CS OPTIONS: TIMER OFF
1)LOCAL 7)CD OPTIONS: TIME 30 SEC
5)PORT CONFIG 9)SR OPTIONS:
PORT: 0.1 NX56/64 2)REMOTE PORT: 1.2 DSU-DP 3)TEST OPTIONS PORT: 1.1 DSU-DP 4)DIAL OPTIONS
5)MANUAL COMMAND
2)DATA FORMAT:
3)DTE CMD OPTION:
4)TX CLOCK:
6)ANTI-STREAM TIME 10 SEC
8)TR OPTIONS: TIME 60 SEC
Figure 4-10
Anti-Stream Options
61200.128L1-1 Dual DSU-DP User Manual 39
Chapter 4. Configuration
The factory default setting is TIMER OFF. Table 4-J shows the available options and their AT commands.
Table 4-J
Anti-Stream AT Commands
Front Panel
TIMER OFF %T0 Anti-stream timer disabled TIME 10 SEC. %T1 Timeout equal 10 seconds TIME 30 SEC. %T2 Timeout equal 30 seconds TIME 60 SEC. %T3 Timeout equal 60 seconds
AT
Command
Description
40 Dual DSU-DP User Manual 61200.128L1-1
CD Options
Chapter 4. Configuration
The CD OPTIONS menu is used to select one of three different control modes for the receive line signal detector (CD) lead. The default factory setting is NORMAL (see Figure 4-11).
1)NETWORK OPTS 1)DTE RATE:
2)DTE OPTIONS 5)CS OPTIONS
1=LOCAL 7)CD OPTIONS: FORCED ON
5)PORT CONFIG 9)SR OPTIONS: OFF WITH LOCD
PORT: 0.1 NX56/64 2=REMOTE PORT: 1.2 DSU-DP 3)TEST OPTIONS PORT: 1.1 DSU-DP 4)DIAL OPTIONS
5)MANUAL COMMAND
2)DATA FORMAT:
3)DTE CMD OPTION:
4)TX CLOCK:
6)ANTI-STREAM:
8)TR OPTIONS: NORMAL
Figure 4-11
Selecting CD Options
Table 4-K shows the equivalent AT commands for setting CD options.
Table 4-K
CD Options AT Commands
Front Panel
AT
Command
Description
FORCED ON &C0 On all the time. NORMAL &C1
On only when data present on network.
OFF WITH LOCD &C2 On except after disconnect in
Switched 56 application.
61200.128L1-1 Dual DSU-DP User Manual 41
Chapter 4. Configuration
g
y
y
TR Options
The TR OPTIONS menu is used to select the DSU-DP response to the data terminal ready (TR) lead. The factory default setting is IGNORED (see Figure 4-12).
1)NETWORK OPT.
1)DTE RATE:
2)DATA FORMAT:
2)DTE OPTIONS 4)TX CLOCK:
1)LOCAL 6)ANTI-STREAM:
5)PORT CONFIG 8)TR OPTIONS: I GNORED
PORT: 0.1 NX56/64 2)REMOTE 9)SR OPTIONS: IDLE WHEN OFF PORT: 1.1 DSU-DP OFF->ON DIAL #1 PORT: 1.2 DSU-DP 3)TEST OPTIONS OFF->ON DIAL #2
4)DIAL OPTIONS
5)MANUAL COMMAND
Table 4-L shows the equivalent AT commands for setting TR OPTIONS.
3)DTE CMD OPTION:
5)CS OPTIONS:
7)CD OPTIONS:
Figure 4-12
Selecting TR Options
Table 4-L
TR Options AT Commands
Front
Panel
AT
Command
Description
IGNORE &D0 Ignore the TR input. IDLE WHEN OFF &D2 See the followin
Note.
OFF>ON DIAL #1 &D3 Dial Stored #1: TR goes off to on
(SW56 onl
).
OFF>ON DIAL #2 &D4 Dial Stored #2: TR goes off to on
(SW56 onl
).
For IDLE WHEN OFF option: In SW56 mode, TR Off causes the DSU to go On Hook (Idle). The unit also will not dial out if TR is off. In dedicated mode, the DSU goes into DTE command mode when TR goes off. When TR goes on, if the DSU does not receive a command in the number of seconds set in S40, the DSU goes into data mode.
42 Dual DSU-DP User Manual 61200.128L1-1
Chapter 4. Configuration
SR Options
The SR OPTIONS menu is used to select the operating mode for the data set ready (SR) lead. The factory default setting is OFF W/TEST + OOS (shown in Figure 4-13).
1)NETWORK OPTS
1)DTE RATE)
2)DATA FORMAT:
2)DTE OPTIONS 4)TX CLOCK:
1)LOCAL 6)ANTI-STREAM:
5)PORTCONFIG 8)TR OPTIONS: FORCED ON
PORT: 0.1 NX56/64 2)REMOTE 9)SR OPTIONS: OFF W/OOS ONLY PORT: 1.2 DSU-DP OFF W/LOCD PORT: 1.1 DSU-DP 3)TEST OPTIONS OFF W/TEST
4)DIAL OPTIONS OFF W/TEST+OOS
5)MANUAL OFF W/TST+LOCD
3)DTE CMD OPTION:
5)CS OPTIONS:
7)CD OPTIONS:
Figure 4-13
Setting SR Options
Table 4-M shows the AT commands for setting SR OPTIONS.
Table 4-M
SR Options AT Commands
Front
Panel
AT
Command
Description
FORCED ON &S0 Always on.
Off when network Out Of
OFF W/OOS ONLY &S1
Service (OOS). Off 5 seconds after disconnect
OFF W/LOCD &S3
(SW56 only). OFF W/TEST &S0_C0 Off when unit is in test. OFF W/TEST +00S &S1_C0 Off in test or OOS.
Off 5 seconds after disconnect OFF W/TST +LOCD &S5
61200.128L1-1 Dual DSU-DP User Manual 43
or test.
Chapter 4. Configuration
TEST OPTIONS
The TEST OPTIONS menu enables or disables different test modes and specifies the maximum test time allowed.
Test Timeout
The TEST TIMEOUT option sets the length of time a DSU-DP remains in a test mode before automatically returning to the data mode. Enter the timeout from 0 to
255 seconds. The factory default setting is off (0). Figure 4-14 shows the menu path used to access TEST TIMEOUT.
1)NETWORK OPTS
2)DTE OPTIONS
1)LOCAL 1)TEST TIME: XX
3)TEST OPTIONS 2)RDL TEST:
5)PORT CONFIG
PORT: 0.1 NX56/64 2)REMOTE PORT: 1.2 DSU-DP 4)DIAL OPTIONS PORT: 1.1 DSU-DP 5)MANUAL COMMAND
Figure 4-14
Setting Test Timeout Option
Table 4-N shows the equivalent AT command for setting the TEST TIMEOUT.
Table 4-N
Test Timeout AT Command
Front
Panel
AT
Command
Description
ENTER TIMEOUT S18=x Specify 0 - 255 seconds test timeout
44 Dual DSU-DP User Manual 61200.128L1-1
Remote Digital Loopback
The RDL (Remote Digital Loopback) option specifies whether or not the DSU-DP responds to an RDL request from the far end of the circuit. The factory default setting is RDL ENABLED. Figure 4-15 shows the menu path used to access this option.
1)NETWORK OPTS
2)DTE OPTIONS
Chapter 4. Configuration
1)LOCAL
5)PORT CONFIG
PORT: 0.1 NX56/64 2)REMOTE 4)DIAL OPTIONS PORT: 1.2 DSU-DP 5)MANUAL COMMAND PORT: 1.1 DSU-DP
3)TEST OPTIONS 2=RDL TEST: DISABLED
Table 4-O shows the equivalent AT commands for setting the RDL option.
Remote Digital Loopback AT Commands
Front Panel
AT
Command
RDL DISABLED &T5 RDL request from remote DSU ignored RDL ENABLED &T4 RDL request accepted
1=TEST TIME: ENABLED
Figure 4-15
Remote Digital Loopback
Table 4-O
Description
61200.128L1-1 Dual DSU-DP User Manual 45
Chapter 4. Configuration
CONFIGURING DIAL OPTIONS
The DIAL OPTIONS menu stores up to two phone numbers and defines the AUTO ANSWER operation of the DSU-DP when it is configured for Switched 56 operation.
Phone Number
The DSU-DP stores up to two numbers of 36 digits each. Edit a phone number by reentering the entire number. This process overwrites the previously stored number. Figure 4-16 shows the menu path used to access the PHONE NUMBERS option.
1)NETWORK RATE
1)LOCAL 3)TEST OPTIONS
5)PORT CONFIG 1)PHONE NUMBERS EDIT: (1-2) NNNNNNN
PORT: 0.1 NX56/64 2)RE MO TE 4)DIAL OPTIONS PORT: 1.2 NX56/64 2)AUTO ANSWER: PORT: 1.2 DSU-DP 5)MANUAL
2)DTE OPTIONS
STORED NUMBER TO
Figure 4-16
Editing Stored Phone Numbers
Table 4-P shows the AT Command for storing phone numbers.
Table 4-P
AT Command for Storing Phone Numbers
AT
Command
Description
&Zn= Store Phone Number
46 Dual DSU-DP User Manual 61200.128L1-1
Chapter 4. Configuration
E
Auto Answer
The AUTO ANSWER option is used to specify how incoming calls are to be answered. If ENABLED, incoming calls are automatically answered by the DSU­DP. If DISABLED, an incoming call can be answered manually by an AT or V.25 command from the DTE, or by raising TR from the DTE. Figure 4-17 shows the menu path used to enable or disable this option. The default setting is AUTO ANSWER ENABLED.
1)NETWORK TYPE
1)LOCAL 3)TEST OPTIONS
5)PORT CONFIG 1)PHONE NUMBER
PORT: 0.1 NX56/64 2)REMOT PORT: 1.2 DSU-DP 2)AUTO ANSWER DISABLED PORT: 1.1 DSU-DP 5)MANUAL COMMAND ENABLED
2)DTE OPTIONS
4)DIAL OPTIONS
Figure 4-17
Enabling/Disabling the Auto Answer Function
Table 4-Q show the AT Commands available for the AUTO ANSWER option.
Table 4-Q
AT Commands for Auto Answer
Front Panel
AT
Command
Description
DISABLED _J0 Auto Answer disabled ENABLED _J1 Auto Answer enabled
61200.128L1-1 Dual DSU-DP User Manual 47
Chapter 4. Configuration
MANUAL COMMAND
The MANUAL COMMAND option is a shortcut method for entering configuration and control commands for the DSU-DP.
The first display prompts the user to enter the command number.
Figure 4-18 shows the menu path for MANUAL COM­MAND. The available manual commands are listed in Table 4-R.
COMMAND:00
1)LOCAL 2)DTE OPTIONS
5) PORT CONFIG 4)DIAL OPTIONS
PORT: 0.1 NX56/64 2)REMOTE COMMAND:XX PORT: 1.2 DSU-DP 5)MANUAL COMMAND COMMAND:XX VALUE:YY
PORT: 1.1 DSU-DP
1)NETWORK OPTS
3)TEST OPTIONS
Figure 4-18
Manual Command
Use the number keys to enter the hexadecimal com­mand number. Press Enter to complete. Once the command number is entered, the display shows both the command number and the present value or setting for the command. The command value can be edited or reissued with the existing value.
COMMAND: XX VALUE: YY
Use the number keys to enter the hexadecimal value. Press Enter to complete. The system briefly displays COMMAND ACCEPTED and returns to the active menu.
48 Dual DSU-DP User Manual 61200.128L1-1
Chapter 4. Configuration
Table 4-R
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 Timeout (seconds) 28 00 to FF Load Factory Opt. Option Set #1 8A 00 Option Set #2 8A 01 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 EIA LLB SIGNAL Disable 9C 00 Enable 9C 01
61200.128L1-1 Dual DSU-DP User Manual 49
Chapter 4. Configuration
50 Dual DSU-DP User Manual 61200.128L1-1
DIALING OVERVIEW
In Switched 56 mode (SW56) the DSU-DP operates as a 4-wire Switched 56 DSU. Call initiation and termination can be accomplished through either the TSU/HSU front panel or the DTE interface via the AT command set or V.25 bis. The AT command set and V.25 bis are covered in other chapters. This chapter covers dialing via the front panel.
Chapter 5. Dialing
Chapter 5
Dialing
Figure 5.1 describes the menu path used to initiate a call.
1)TIME/DATE
2)FACT RESTORE
3)SET PASSCODE
3)UTIL 4)UNIT I.D.
5)SOFTWARE REV 1=DIAL STORED #
6)PORT UTILITY 1)CALL/HANG-UP 2=ENTER DIAL #
1.X DSU-DP 2)DSU-DP REV? 3=REDIAL LAST #
Figure 5-1
Menu Path to Initiate a Call
If the DSU-DP is not configured for either AT&T/MCI SW56 or Sprint SW56, the unit displays:
NOT IN SW56 MODE PRESS <CANCEL>
61200.128L1-1 Dual DSU-DP User Manual 51
Chapter 5. Dialing
Once you enter the CALL/HANG-UP menu, one of three menus appears based on the status of the SW56 net­work. These three menus are discussed in this chapter.
1. No Call Active
If no call is active the DSU-DP is idle and the screen displays the menu shown in Figure 5.1.
To dial a stored telephone number, press 1 (for DIAL STORED #) followed by Enter. The unit displays the two stored telephone numbers. Enter 1 or 2 for the desired stored number and press Enter to initiate dialing.
To dial a telephone number not already stored, press 2 (for ENTER DIAL #) followed by Enter. The screen goes blank and the cursor is flashing in the upper left hand corner. Begin entering your telephone number and press Enter to intiate dialing.
To dial the previous number that was called, press 3 (for REDIAL LAST #) followed by Enter. The DSU initiates dialing the last telephone number dialed.
Once dialing has been initiated, the DSU-DP turns on the status messages. The first status message is DIAL­ING followed by each digit of the telephone number to dial as it is being dialed out. If the network fails to send a wink (SW56 equivalent of a dial tone), the status message displayed is NO WINK FROM CO for approxi­mately five (5) seconds followed by IDLE.
If the SW56 network is working properly, the DIALING message persists until the distant DSU answers the call, upon which the status message changes to DATA MODE. Press the CANCEL button to exit from the status messages at any time.
52 Dual DSU-DP User Manual 61200.128L1-1
Chapter 5. Dialing
2. Call Is Active
If a call is active (DSU-DP status = DATA MODE) upon entering the CALL/HANG-UP menu, the following is displayed:
1 = HANG UP (Flashing) 2 = STAY ON LINE
Press 1 (for HANG-UP) followed by Enter to disconnect the call. The display backs out to PORT UTILITY. To see status messages, press 2 (for STAY ON-LINE) and the status messages are displayed. Press Cancel to stop viewing status messages.
3. Receiving an Incoming Call with Auto Answer Disabled
If the DSU is receiving an incoming call and Auto Answer is disabled, upon entering the CALL/HANG-UP menu the following is displayed:
1 = ANSWER CALL (Flashing) 2 = STAY IDLE
Press Enter to answer the call, otherwise press Cancel. If answering is selected, the DSU momentarily displays COMMAND ACCEPTED and then returns the display to PORT UTILITY.
61200.128L1-1 Dual DSU-DP User Manual 53
Chapter 5. Dialing
54 Dual DSU-DP User Manual 61200.128L1-1
TEST OVERVIEW
Chapter 6. Testing & Troubleshooting
Chapter 6
Testing & Troubleshooting
The DSU-DP 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 (see Figure 6-1).
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.
DTE DTE
TD
RD
LOCAL
DSU/DP
Tx
Rx
TSU­XXX
Tx
Rx
TELCO
T1
REMOTE DSU/CSU
Tx
Rx
Tx
Rx
TD
RD
Figure 6-1
Normal Operation Before Initiating Loopback Test
All diagnostic tests disrupt data flow.
61200.128L1-1 Dual DSU-DP User Manual 55
Chapter 6. Testing & Troubleshooting
Initiating a Test
Initiate tests using the following procedure:
1. Select Test from the Main menu by pressing 4, then
press Enter.
2. Select PORT TEST and then select the desired DSU-
DP port.
3.. Specify local or remote by selecting the correspond-
ing number, followed by Enter.
4. Use the Up and Down Arrows to view test options.
5. Select a test from the available options by pressing
the corresponding number twice or select the test option and press Enter.
The example in Figure 6-2 shows the menu path for initiating a local DTE and Network test.
3)PORT TEST 1)LOCAL UNIT 6)DTE W/TP PORT: 0.1 NX56/64 7)TP TO NETWORK PORT: 1.2 DSU-DP PORT: 1.1 DSU-DP 2)REMOTE UNIT ENTER TEST UNIT
1)EXIT TEST
2)DTE & NET (LL)
3)NET ONLY (RT)
4)DTE ONLY
5)TEST PATTERN
ADDRESS:0
Figure 6-2
Initiating a Test
Once the test is initiated the screen displays
A. DTE & NETWORK
<ENTER > TO EXIT
and the TEST LED for the specified module will turn On.
56 Dual DSU-DP User Manual 61200.128L1-1
DSU-DP Test Operation
Pressing Enter will exit the tests and the unit will momentarily display:
B. EXITING TEST
followed by:
C. <ENTER> TO START
Pressing Enter causes the test to restart and screen A. is again displayed. Another test may be chosen by press­ing Cancel to return to the previous menu.
If you have initiated a test and wish to back out of the test screen without exiting the test, press Cancel and the unit will return to the previous menu.
Both NET ONLY (RT) and DTE ONLY operate in the same manner.
Chapter 6. Testing & Troubleshooting
PLEASE WAIT
DTE & NET TEST
Tests Using the TEST Pattern Generator
If you wish to run tests utilizing the test pattern genera­tor, i.e., DTE with TP or TP to Network (see Figure 6-2), first select the desired test pattern to run under 5)TEST PATTERN (see Figure 6-3). The default is 2047 PAT­TERN.
61200.128L1-1 Dual DSU-DP User Manual 57
Chapter 6. Testing & Troubleshooting
a
9
1)EXIT TEST
2)DTE & NET (LL)
3)NET ONLY (RT)
4)DTE ONLY
5)TEST PATTERN
3)PORT TEST 1)LOCAL UNIT 6)DTE W/TP PORT: 0.1 NX56/64 7)TP TO NETWORK PORT: 1.2 DSU-DP PORT: 1.1 DSU-DP 2)REMOTE UNIT ENTER TEST UNIT
ADDRESS:0
Once the desired test pattern has been selected, choose either DTE with TP or TP TO NETWORK (Figure 6-2) and press ENTER and the unit will display:
DTE WITH TP (or TEST PATTERN) TST ERR = XXXX
1)2047 PATTERN
2)511 PATTERN
3)STRESS PTRN#1
4)STRESS PTRN #2
5)STRESS PTRN #3
6)STRESS PTRN #4
Figure 6-3
Complete Test Menu
To inject an error into the test pattern generator, press 2; to clear the error count, press 1.
Table 6-A describes the different values for TST ERR=XXXX.
Table 6-A
Values for TST ERR=XXXX
XXXX Meaning
0000-9999 NO SYNC OVERFLOW
Displays the number of bit errors TP receiver unable to sync-up on test p The number of bit errors has exceeded
58 Dual DSU-DP User Manual 61200.128L1-1
Chapter 6. Testing & Troubleshooting
To exit the test, press Enter and the bottom line will briefly display <ENTER> TO EXIT. Press Enter again and the unit will briefly display:
EXITING TEST PLEASE WAIT
followed by:
<ENTER> TO START DTE W/TP TEST (or TP TO NET TEST)
Press Enter to restart the test or press Cancel to back up to the previous menu.
61200.128L1-1 Dual DSU-DP User Manual 59
Chapter 6. Testing & Troubleshooting
Remote Test
To place the far-end DSU into a loopback, choose the
2)REMOTE UNIT option and follow the diagram in
Figure 6-4. The test unit address is the network address of the far-end DSU. When selecting the test pattern, if
7)DATA FROM DTE is chosen some BERT-type device
should be connected to the DTE interface.
1)LOCAL UNIT
3)PORT TEST
PORT: 0.1 NX56/64 2)REMOTE UNIT ENTER TEST UNIT PORT: 1.2 DSU-DP ADDRESS:0 Continued Below PORT: 1.1 DSU-DP
1)2047 PATTERN
2)511 PATTERN
3)STRESS PTRN#1
4)STRESS PTRN#2 PLEASE WAIT
5)STRESS PTRN#3 REMOTE WITH TP
6)STRESS PTRN#4 TST ERR=XXXX
7)DATA FROM DTE PLEASE WAIT
REMOTE LOOPED <ENTER TO EXIT>
Figure 6-4
Remote Test Example
The test pattern mode works the same as the other test pattern modes:
2 to inject error
1 to clear error count
<ENTER> twice to exit test (see test pattern generator)
60 Dual DSU-DP User Manual 61200.128L1-1
TROUBLESHOOTING
This section is intended to pr ovide a quick and easy means of diagnosing suspected problems associated with local or r emotely attached ADTRAN DSU/CSUs. Two separate troubleshooting sections are provided; one focuses on new installs, the other on existing cir cuits.
See Troubleshoting Supplement appendix for information on the TSU Alarm and History Buffer. T wo errors are discussed there: EPROM errors and DTE streaming.
Messages from the DSU/CSU
The DSU-DP displays messages on the LCD display and LEDs concerning the status of the unit and the local loop. If the Alarm LED is On, one or more of the messages shown in Table 6-B is displayed on the LCD.
The Status menu must be selected in order for the unit to
display status messages. Return to the Main menu where STATUS can be selected. Then select PORT STATUS and the needed DSU-DP.
Chapter 6. Testing & Troubleshooting
Table 6-B
Messages from the DSU-CSU
Message Meaning Probable Cause Action
NET IS NORMAL
OOS/OOF FROM NET
TEST FROM TELCO
DSU-DP INACTIVE
61200.128L1-1 Dual DSU-DP User Manual 61
Good signal being received from the telco.
Unit detects an Out of Service or Out of Frame condition from the telco.
Telco activated a loopback to test the DDS circuit.
TSU/HSU controller has DSU-DP in standby mode.
Indicates good connection through telco network. Alarm LED is off.
Telco is having problems with DDS circuit or remote unit is turned off or disconnected
Telco network
• DSU-DP out of DS0 map
• TSU/HSU in Test or alarm
No action required; unit properly connected to telco circuit.
Check remote unit. Contact telco service provider. If a problem persists, contact telco provider.
Wait until test is complete or contact telco service provider.
• Map DSU-DP into DS0 map
• Check TSU/HSU operation
Chapter 6. Testing & Troubleshooting
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 6-C to ensure the unit is configured properly.
After verifying the items listed in Table 6-C the unit should operate properly and display the following:
DATA MODE NET IS NORMAL
If a status message other than DATA MODE NET IS NORMAL is shown, begin performing diagnostics
described in the section Test Sequence for Troubleshooting New Installs or Existing Circuits.
Configuration Item to Check
Network Rate Data Format DTE Cable Run selftest
Option Selection Action
2.4 to 64 kbps
Async or Sync
N/A
N/A
Table 6-C
Troubleshooting New Installs
Select the network rate of the DDS service from the configuration menu. Select the type of data to be used from the Configuration menu. Verify DTE cable connection to the proper DTE port on the DSU-DP. Verify the unit passes self test.
62 Dual DSU-DP User Manual 61200.128L1-1
Chapter 6. Testing & Troubleshooting
Test Sequence for Troubleshooting New Installs or Existing Circuits
If your DSU .... Do this...
Is suspected of having Perform a Self Test to problems determine if the unit is
in good health.
Is receiving excessive errors Perform a DTE with requiring retransmission Test Pattern to of data determine if the
unit’s internal transmitter and receiver is operating error free.
Is receiving excessive Perform a Remote Test errors requiring to verify the connection retransmission of data between the local and
remote unit is error free. Run the test using all available test patterns.
If an external BERT tester is available these additional tests may be performed:
• DTE & Loop Test
• DTE Only Test
• Loop Only Test
If the unit fails any of these tests or the problem has not been determined, contact ADTRAN Technical Support; see inside back cover.
61200.128L1-1 Dual DSU-DP User Manual 63
Chapter 6. Testing & Troubleshooting
p
LOCAL UNIT DIAGNOSTICS
The local DSU-DP can perform six different tests; see Table 6-D.
Table 6-D
Test AT Commands
Front
Panel Display
DTE & Net (LL) &T10 TD/RD and RX/TX Loopbacks Net Only (RT) &T11 RX/TX Loopback at Network Interface DTE Only &T1 TX/RX Loopback at DTE Interface DTE with TP &T8 TX/RX Loopback with Test Pattern TP to Network &T9 Transmit/Receive Test Pattern Self Test Z Check Internal Components (Resets Unit) Exit Test &T0 Sto
TD = Customer Transmit Data RD = Customer Receive Data TX = Network Transmit Data RX = Network Receive Data
AT
Command
Description
s test, returns to data mode
64 Dual DSU-DP User Manual 61200.128L1-1
DTE & NET
Test Description
DTE
Chapter 6. Testing & Troubleshooting
The DTE & Net test splits the DSU-DP into two separate DTE and network interface sections and then loops the receive data of each interface back to its respective transmit data. The DTE & NET test provides a bidirec­tional loopback at the DSU-DP. Figure 6-5 illustrates the loopback points and the signal paths for this test.
LOCAL
DSU-DP
Test Purpose
Tx
Rx
Tx
Rx
Tx
Rx
DTE Loopback Loopback to T1
DTE & Net Test
The DTE & Net test is used for the following purposes:
Verify integrity of the DTE interface and cable.
Provide a loopback for network tests.
T1
Figure 6-5
61200.128L1-1 Dual DSU-DP User Manual 65
Chapter 6. Testing & Troubleshooting
Initiating
Follow the menu path outlined in Figure 6-6 to initiate a DTE & Loop Test.
4)TEST / 3)PORT TEST
PORT: 0.1 NX56/64 2)REMOTE UNIT
PORT: 1.2 NX56/64
PORT: 1.1 NX56/64
Interpreting Test Results
1)LOCAL UNIT
Initiating a DTE & Net Test
1)EXIT TEST
2)DTE & NET(LL)
3)NET ONLY (RT)
4)DTE ONLY
5)TEST PATTERN
6)DTE W/TP
7)TP TO NETWORK
Figure 6-6
A BERT tester must be used to interpret the test results of a DTE & Net test.
66 Dual DSU-DP User Manual 61200.128L1-1
NET Only (RT)
Chapter 6. Testing & Troubleshooting
The Net Only (RT) test allows the T1 interface and a major portion of the DTE interface for the local DSU-DP to be tested from the remote site over the actual commu­nication circuit. Figure 6-7 illustrates the loopback point and the signal paths for this test.
LOCAL
DSU-DP
Test Purpose
Initiating
DTE
Interface
Tx
Rx
Tx
TELCO
Rx
Figure 6-7
Loop Only Test
The Net Only test is used to provide a loopback for network tests.
Follow the menu path outlined in Figure 5-8 to initiate a Net Only test.
1)EXIT TEST
2)DTE & NET (LL)
3)NET ONLY (RT)
4)DTE ONLY
5)TEST PATTERN
1)LOCAL UNIT
4)TEST / 3)PORT TEST
PORT: 0.1 NX56/64 2)REMOTE UNIT
PORT: 1.2 NX56/64
PORT: 1.1 NX56/64
6)DTE W/TP
7)TP TO NETWORK
Figure 6-8
Initiating a Net Only Test
61200.128L1-1 Dual DSU-DP User Manual 67
Chapter 6. Testing & Troubleshooting
Interpreting Test Results
The Net Only test is used for the purpose of looping the DDS service back to the telco. No test results are available from the local DSU-DP.
68 Dual DSU-DP User Manual 61200.128L1-1
DTE Only
DTE
LOCAL
DSU-DP
Rx
Tx
Rx
Tx
RD
TD
Chapter 6. Testing & Troubleshooting
The DTE Only test provides a method for testing both the DTE interface drivers and receivers of the local DSU­DP (see Figure 6-9). This test can be used to verify proper operation between the local DTE and the local DSU-DP .
When this test is implemented, the far unit receives an OOS/ OOF message from the network and enters an alarm state.
Figure 6-9
DTE Only Test Diagram
Test Purpose
The DTE Only test is used for the following purposes:
Verify integrity of the DTE interface
Verify integrity of connection between DTE and
DSU-DP
61200.128L1-1 Dual DSU-DP User Manual 69
Chapter 6. Testing & Troubleshooting
Initiating
Follow the menu path outlined in Figure 6-10 to initiate a DTE Only test.
4)TEST / 3)PORT TEST
PORT: 0.1 NX56/64 2)REMOTE UNIT
PORT: 1.2 NX56/64
PORT: 1.1 NX56/64
Interpreting Test Results
1)LOCAL UNIT
Initiating a DTE Only Test
1)EXIT TEST
2)DTE & NET(LL)
3)NET ONLY (RT)
4)DTE ONLY
5)TEST PATTERN
6)DTE W/TP
7)TD TO NETWORK
Figure 6-10
A BERT tester must be used to interpret the test results of a DTE Only test.
70 Dual DSU-DP User Manual 61200.128L1-1
DTE with Test Pattern
The DTE with TP (test pattern) test is similar to the DTE Only test described previously except the test pattern is generated using the DSU-DP internal test pattern generator. This test can be used to detect deficiencies within the internal drivers and receivers of the DSU-DP . Figure 6-11 illustrates the loopback point and the data paths for this test.
DTE
Chapter 6. Testing & Troubleshooting
LOCAL
DSU-DP
Error Inject
Test Pattern
Generator
Test Purpose
Initiating
Tx
Rx
Error Clear
Tx
Rx
Test Pattern
Detector
Tx
Rx
Figure 6-11
DTE with Test Pattern
A DTE test using a test pattern is used for the following purposes:
Verify integrity of the DTE interface.
Verify integrity of connection between DTE and DSU-
DP.
Follow the menu path outlined in Figure 6-12 to initiate a DTE Test using a Test Pattern. First select the desired test pattern to be generated, then choose the test.
61200.128L1-1 Dual DSU-DP User Manual 71
Chapter 6. Testing & Troubleshooting
1)EXIT TEST
2)DTE & NET (LL)
3)NET ONLY (RT)
4)DTE ONLY
5)TEST PATTERN
4)TEST 3)PORT TEST 1)LOCAL UNIT 6)DTE W/TP
PORT: 0.1 NX56/64 7)TP TO NETWORK PORT: 1.2 DSU-DP PORT: 1.1 DSU-DP 2)REMOTE UNIT ENTER TEST UNIT
ADDRESS:0
Initiating a DTE Test with Test Pattern
Interpreting Test Results
If the unit is functioning properly, the DSU-DP displays:
DTE WITH TP TST ERR=XX
1)2047 PATTERN
2)511 PATTERN
3)STRESS PTRN#1
4)STRESS PTRN #2
5)STRESS PTRN #3
6)STRESS PTRN #4
Figure 6-12
The first line of the display indicates the type of test being performed while the second line of the display indicates the number of errors accumulated by the test pattern detector.
If errors occur during this test, the test error count can be reset to zero by pressing 1. To verify proper operation of this test, single bit errors can be injected into the transmitted test pattern by pressing 2. These errors appear on the TEST ERR display.
72 Dual DSU-DP User Manual 61200.128L1-1
TP to Network
Chapter 6. Testing & Troubleshooting
The TP TO NETWORK option converts the local DSU­DP into a BERT tester for the purpose of testing the DDS circuit. When this test is used, the remote DSU/ CSU must be in loopback or transmitting a test pattern. Figure 6-13 illustrates the data paths for this mode.
LOCAL
DSU-DP
Error Inject
Tx
Rx
Error Clear
Test Pattern
Generator
Test Pattern
Detector
Test Purpose
REMOTE
DSU/CSU
Error Inject
Tx
Rx
TELCO
Tx
Rx
Error Clear
Testing using a test pattern is used for the following purposes:
Transmits user selected test pattern using an internal test pattern generator, and compares the received data using an internal test pattern detector to detect if there are any errors on the DDS circuit.
Injects errors and verifies the unit transmits data across the communication circuit to the remote unit.
Helps determine from which direction the circuit is receiving errors.
Test Pattern
Generator
Tx
Rx
Test Pattern
Detector
Figure 6-13
Test Pattern Only
Initiating
Follow the menu path outlined in Figure 6-14 to initiate a test using a test pattern.
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Chapter 6. Testing & Troubleshooting
1)EXIT TEST
2)DTE & NET (LL)
3)NET ONLY (RT)
4)DTE ONLY
5)TEST PATTERN
4)TEST 3)PORT TEST 1)LOCAL UNIT 6)DTE W/TP
PORT: 0.1 NX56/64 7)TP TO NETWORK PORT: 1.2 DSU-DP PORT: 1.1 DSU-DP 2)REMOTE UNIT ENTER TEST UNIT
ADDRESS:0
Initiating a Test Using a Test Pattern
Interpreting Test Results
If the unit is functioning properly, the display should show the following:
TST ERR = 00
1)2047 PATTERN
2)511 PATTERN
3)STRESS PTRN#1
4)STRESS PTRN #2
5)STRESS PTRN #3
6)STRESS PTRN #4
Figure 6-14
Exit Test
If you leave the Test Options menu for any reason, you can exit any test by selecting the TESTS OPTIONS menu and selecting EXIT TEST.
74 Dual DSU-DP User Manual 61200.128L1-1
REMOTE UNIT DIAGNOSTICS
A remote DSU-DP can perform seven different tests; see Table 6-E.
Chapter 6. Testing & Troubleshooting
Table 6-E
Remote Tests and AT Commands
Front Panel
AT
Command
Description
1=2047 PATTERN _T0&T7 Standard 2047 random data pattern 2=511 PATTERN _T1&T7 Standard 511 random data pattern 3=STRESS PTRN #1 _T2&T7 DDS Stress Pattern #1 4=STRESS PTRN #2 _T3&T7 DDS Stress Pattern #2 5=STRESS PTRN #3 _T4&T7 DDS Stress Pattern #3 6=STRESS PTRN #4 _T5&T7 DDS Stress Pattern #4
7=DATA FROM DTE &T6 Data from DTE
The Remote Unit submenu allows a remotely installed DSU to be placed into loopback. There are six test patterns to choose from or Data from the DTE may be selected. See Figure 6-15 for a V.54 RDL test pattern.
LOCAL
DSU-DP
Test Pattern
DTE
Tx
Rx
Error
Inject
Error
Clear
Rx
Generator
Tx
Test Pattern
Detector
Tx
Rx
TELCO
REMOTE
DSU/CSU
Tx
Rx
Tx
Rx
Local Unit Initiates Test
Figure 6-15
V.54 RDL with Test Pattern
61200.128L1-1 Dual DSU-DP User Manual 75
Chapter 6. Testing & Troubleshooting
Test Purpose
Test the local DSU, the DDS circuit, and remote DSU.
Initiating
Follow the menu path outlined in Figure 6-16 to place a remote DSU-DP into loopback.
1)2047 PATTERN
1)LOCAL UNIT 2)511 PATTERN
4)TEST / 3)PORT TEST 3)STRESS PTRN #1
PORT: 0.1 NX56/64 2)REMOTE UNIT ENTER TEST UNIT 4)STRESS PTRN #2
PORT: 1.2 NX56/64 ADDRESS: 0 5)STRESS PTRN #3
PORT: 1.1 NX56/64 6)STRESS PTRN #4
7)DATA FROM DTE
Figure 6-16
Initiating a Remote Test
After selecting Remote Unit from the menu, the follow­ing prompt is displayed for entering the address for the remote unit:
ENTER TEST UNIT ADDRESS:XX
Use the number keys to type the address of the remote DSU, then press Enter. The test pattern selections are displayed. After a test pattern is selected, the system briefly displays PLEASE WAIT.
Test Results
If the test is successful the status menu is displayed. If not, UNABLE TO EXECUTE TEST is displayed.
Interpreting Test Results
If the unit is functioning properly, the display should show:
TST ERR = 00.
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STATUS DISPLAY
Chapter 7. Status Selection
Chapter 7
Status Selection
The STATUS selection displays two lines at a time of the current operational status of the network and the DTE interfaces.
Examples of possible status displays are shown in Figure 7-1.
Screen 1
Screen 2
Screen 3
Screen 4
Screen 5
DATA MODE
NET IS NORMAL
NETWORK 56K
DTE 56K SYNC
DTE CONNECTOR
IS XXX
RS CS TD RD ON ON ON ON
TR SR CD LLB ON ON OFF OFF
DSU Operational Status DDS Network Status
Network Rate DTE Rate/Mode
DSU-DP automatically detects which cable is attached and displays XXX as either EIA-232 or V.35. If no cble is attached, EIA-232 is the default.
DTE Control /Data Leads
Lead Status
DTE Control Leads Lead Status
Figure 7-1
Examples of Status Displays
61200.128L1-1 Dual DSU-DP User Manual 77
Chapter 7. Status Selection
DSU Operational Status
Possible messages include:
DATA MODE
The unit is ready to pass data if network status is normal.
UNIT IN TEST
The unit is in test. Scroll to next status menu for test type.
DTE COMMAND MODE
The unit is in command mode from the DTE (AT or V.25 bis).
In SW56 mode the following messages are possible:
IDLE
The unit is idle, waiting for a call or a dial command.
INCOMING CALL
The unit has detected an incoming call.
DIALING
The unit is dialing a number.
Network Status
This line of the display shows the current status of the dedicated network interface. Possible messages include:
NET IS NORMAL
The DSU is connected to the T1. No network irregular­ity detected.
DSU-DP INACTIVE
The DSU-DP has been put into Stand-By mode by the TSU/HSU controller.
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Chapter 7. Status Selection
OOS/OOF FROM NET
The DSU-DP detects an abnormal condition code from the network.
NO FRAME SYNC
The DSU-DP cannot sync on the signal from the telco (64k mode only).
TEST FROM TELCO
The DSU-DP is in a test initiated from the telco. Scroll to next status menu for test type.
In SW56 mode the following messages are possible:
ANSWERING CALL
The DSU-DP is answering an incoming call.
NO WINK FROM CO
The DSU-DP did not see a proper signal from the network during dialing.
CALL DISCONNECT
The SW56 call was terminated.
Network Rate
The message displayed on this line of the Status display screen indicates the rate of the service configured for the network.
DTE Rate/Mode
The message displayed on this line of the Status display screen indicates the DTE data rate and format.
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Chapter 7. Status Selection
DTE Control Leads and Status
Eight DTE interface leads are displayed with their current status (on or off) displayed below them. The leads are identified as follows:
RS Request to send CS Clear to send TD DTE transmit data RD DTE receive data TR Data terminal ready SR Data set ready CD Carrier detect LLB Local loopback
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Appendix A. AT Commands
Appendix A
AT Commands
Table A-A and A-B shows the AT commands available for the DSU-DP.
Table A-A
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 Resul t Code From 1 ATZ R ese t none AT&Cn DCD Option 0 AT&Dn DTR Option 0 AT&Fn Restore Factory Options none AT&Ln Network 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 Configuration none AT&Wn Store User Profile 0
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Appendix A. AT Commands
Command Title Default
AT&Xn Transmit Clock 0 AT&Yn Power Up User Profile 0 AT&Zn=x Store Phone Number none AT%Bn Network Rate Select 0 AT%Kn DTE Rate Select AT%P Password Control 0 AT%P=x Password Entry 0 T%P>x Password Verify 0 AT%R In itiate Remote Config. AT%Tn Anti-stream Option 0 AT_An LLB Control 0 AT_Cn SR Control During Test 0 AT_Dn RTS-CTS Delay 0 AT_Fn Scrambler Control 0 AT_Jn Auto Answer Enable/Disable 0 AT_N=xx Set Network Address none
AT_Rn LB Enable/Disable 0 AT_S=xx Set Serial Number none AT_Tn Select Test Pattern 0
Table A-A (Cont’d)
AT Commands
Table A-B
Test Pattern Commands
Front Panel
2047 PATTERN _T0&T8 Standard 2047 random data pattern. 511 PATTERN _T1&T8 Standard 511 random data pattern.
STRESS PTRN #1 _T2&T8
STRESS PTRN #2 _T3&T8
STRESS PTRN #3 _T4&T8
STRESS PTRN #4 _T5&T8
AT
Command
Description
Stress pattern with alternating high and low ones densities. Repeated pattern of 100 octets: 1111 1111; followed by 100 octets: 0000 0000. Stress pattern with alternating medium and low ones densities. Repeated pattern of 100 octets: 0111 1110; followed by 100 octets: 0000 0000.
Stress pattern with medium ones density. Continuous series of octets: 0011 0010.
Stress pattern with low ones density. Continuous series of octets: 0100
0000.
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Appendix B. Default Configuration Profiles
Default Configuration Profiles
DEFAULT CONFIGURATION PROFILES
The DSU-DP contains two different user profiles (sets of configurations options) stored in read only memory (see Table B-A). The unit is shipped from the factory with profile 1 loaded into the nonvolatile configuration memory. See the Installation chaper and Manual Com- mand section of the Configuration chapter for more information.
Profile 1
Profile 1 is configured for a 56 kbps, synchronous, point-to-point or dial up operation.
Appendix B
Profile 2
Use profile 3 for a SW56, asynchronous operation with CS and CD forced on.
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Appendix B. Default Configuration Profiles
Command/Options Profile Numbers
Manual Command
Escape Character 43=2BH 43=2BH CR Character 13=0DH 13=0DH LF Character 10=0AH 10=0AH BS Character 8 8 SW56 Abort Call Timer 50=32H 50=32H Escape Guard Timer 50=32H 50=32H Command Echo Enable Enable Result Code Enable Enable Long or Short Code Long Long Test Pattern Type 2047 2047 CS Delay Short Short DTR Recog. Delay (x2.5ms) 0 0 DTR Command Timeout (x1 sec) 8 8 AT Password Control Disable Disable
Network Options
Network Rate 56K 56k Network Address 0 0
Remote Conf. En/Dis Enable Enable Network Type Dedicated AT&T/MCI SW56
DTE Options
Remote DSU Address 0 0 DTE Rate (56/64K network ) 56K 57.6K
Scrambler Mode OFF OFF DTE Data Format SYNC ASYNC DTE Command Options DIS DIS Transmit Clock Normal Normal CS Options Follow RS Forced On Anti-stream Timer Timer Off Timer Off CD Options Normal Forced On TR Options Ignored Ignored SR Options Off Test+OOS Off Test+OOS
Test Options
Test Timeout Off Off RDL En/Dis RDL Accepted RDL Accepted EIA Controlled LLB Disable Disable
Dial Options
Auto Answer Enable Enable
Table B-A
Default Configuration Profiles
(00) 1 (01) 2
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Appendix C. DSU toModem Interconnect
M O D E M
D S U III
RC
ETC
RD
TD
DCD
RTS
ETC
RC
TD
RD
RTS
DCD
For Multi-drop requirement:
DSU to Modem Interconnect
MODEM TAIL CIRCUIT APPLICATION
A DSU to modem interconnect diagram for a modem tail circuit application is shown in Figure C-1.
Appendix C
61200.128L1-1 Dual DSU-DP User Manual 85
DSU to Modem Interconnet
Figure C-1
Appendix C. DSU to Modem Interconnect
86 Dual DSU-DP User Manual 61200.128L1-1
56 AND 64 KBPS APPLICATION
The EIA-232 connector, shown in Figure D-1, may be used for 56 and 64 kbps applications. Using the External clock option and this cable should eliminate data errors caused by excessive delays in the DTE transmit clock receiver and transmit data driver. When creating this cable at the DTE interface EIA-232 connec­tor, tie transmit clock lead (TC) to external transmit (ETC) as shown.
Appendix D. EIA-232 Connector
Appendix D
EIA-232 Connector
DSU-DPDTE
Pin 15
Pin 24
(No connection)
61200.128L1-1 Dual DSU-DP User Manual 87
EIA-232 CONNECTOR
TC
ETC
Figure D-1
EIA-232 Connector
Appendix D. EIA-232 Connector
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Appendix E. DSU-DP Configuration Menu Tree
Appendix E
Dual DSU-DP Configuration Menu Tree
This appendix contains a foldout page of the DSU-DP configuration menu tree, Figure E-1.
61200.128L1-1 Dual DSU-DP User Manual 89
Appendix E. DSU-DP Configuration Menu Tree
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