ADTRAN DSU III S2W User Manual
DSU III S2W
Data Service Unit
USER MANUAL
61200.015L2-1B
October 1995
Trademarks:
DATAPATH is a registered trademark of CAE electronics and is used by Northern
Telecom under license.
Hayes is a registered trademark of Hayes Microcomputer Products, Inc.
901 Explorer Boulevard
P.O. Box 070020
Huntsville, AL 35807
Phone: (205) 971-8000
Fax: (205) 971-8699
© 1995 ADTRAN, Inc.
All rights reserved.
Printed in USA.
FCC regulations require that the following information be provided in this manual:
1. This equipment complies with Part 68 of the FCC rules. On the bottom of the
equipment housing is a label that shows the FCC registration number and Ringer
Equivalence Number (REN) for this equipment. If requested, provide this information to
the telephone company.
2. If this equipment causes harm to the telephone network, the telephone company may
temporarily discontinue service. If possible, advance notification is given, otherwise,
notification is given as soon as possible. The telephone company will advise the
customer of the right to file a complaint with the FCC.
3. The telephone company may make changes in its facilities, equipment, operations, or
procedures that could affect the proper operation of this equipment; advance notification
and the opportunity to maintain uninterrupted service is given.
4. If experiencing difficulty with this equipment, please contact ADTRAN for repair and
warranty information. The telephone company may require this equipment to be
disconnected from the network until the problem is corrected, or it is certain the
equipment is not malfunctioning.
5. This unit contains no user serviceable parts.
6. An FCC compliant telephone cord with a modular plug is provided with this equipment.
This equipment is designed to be connected to the telephone network or premises
wiring using an FCC compatible modular jack, which is Part 68 compliant.
7. The following information may be required when applying to the local telephone
company for leased line facilities:
Service Digital Facility Service Order Network
Type Interface Code Code Jacks
2.4 kbps Digital Interface 04DU5-24 6.0F RJ-48S
4.8 kbps Digital Interface 04DU5-48 6.0F RJ-48S
9.6 kbps Digital Interface 04DU5-96 6.0F RJ-48S
56 kbps Digital Interface 04DU5-56 6.0F RJ-48S
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.
Shielded cables must be used with this unit to ensure compliance with Class A FCC limits.
Change or modifications to this unit not expressly approved by the
party responsible for compliance could void the user's authority to
operate the equipment.
CANADIAN EMISSIONS REQUIREMENTS
This digital apparatus does not exceed the Class A limits for radio noise emissions from
digital apparatus as set out in the interference-causing equipment standard entitled
“Digital Apparatus," ICES-003 of the Department of Communications.
Cet appareil nuerique respecte les limites de bruits radioelectriques applicables aux
appareils numeriques de Class A prescrites dans la norme sur le materiel brouilleur:
“Appareils Numeriques,” NMB-003 edictee par le ministre des Communications.
CANADIAN EQUIPMENT LIMITATIONS
Notice: The Canadian Industry and Science Canada label identifies certified
equipment. This certification means that the equipment meets certain telecommunications network protective, operational, and safety requirements. The Department does not guarantee the equipment will operate to the user's satisfaction.
Before installing this equipment, users should ensure that it is permissible to be
connected to the facilities of the local telecommunications company. The equipment must also be installed using an acceptable method of connection. In some
cases, the company's inside wiring associated with a single line individual service
may be extended by means of a certified connector assembly (telephone extension
cord). The customer should be aware that compliance with the above conditions
may not prevent degradation of service in some situations.
Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier. Any repairs or alterations made by the
user to this equipment, or equipment malfunctions, may give the telecommunications company cause to request the user to disconnect the equipment.
Users should ensure for their own protection that the electrical ground connections
of the power utility, telephone lines and internal metallic water pipe system, if
present, are connected together. This precaution may be particularly important in
rural areas.
Caution: Users should not attempt to make such connections themselves, but
should contact the appropriate electric inspection authority, or an electrician, as
appropriate.
The Load Number (LN) assigned to each terminal device denotes the percentage of
the total load to be connected to a telephone loop which is used by the device, to
prevent overloading. The termination on a loop may consist of any combination of
devices subject only to the requirement that the total of the Load Numbers of all
devices does not exceed 100.
T able of Contents
T able of Contents
T able of Contents
Chapter 1. Introduction
Product Overview .................................................................................................................... 1
General Datapath Description ................................................................................................ 3
W arranty and Customer Service ............................................................................................ 4
Chapter 2. Installation
Unpack, Inspect, Power Up..................................................................................................... 5
Receipt Inspection ............................................................................................................ 5
Equipment Provided.................................................................................................. 5
Equipment Sold Separately....................................................................................... 5
Power Up ........................................................................................................................... 6
Network Interface Connection ............................................................................................... 7
DTE Data Connection/Primary DTE ..................................................................................... 8
Dialport Connection .............................................................................................................. 10
Configuration ......................................................................................................................... 11
Configuration Methods .................................................................................................. 11
Front Panel ......................................................................................................................11
AT Commands ................................................................................................................ 12
V.25 bis Commands ....................................................................................................... 13
SDLC/HDLC Option ..............................................................................................13
Character Format.............................................................................................. 13
Command Structure......................................................................................... 13
Bi-Sync Option .........................................................................................................13
Character Format.............................................................................................. 13
Command Structure......................................................................................... 13
Asynchronous Option ............................................................................................. 14
Character Format.............................................................................................. 14
Command Structure......................................................................................... 1 4
Command Descriptions .......................................................................................... 14
Syntax and Possible Responses ..............................................................................15
CIC (Connect Incoming Call) ......................................................................... 15
CNL (Configuration Local)............................................................................. 15
Switched 56 Operation ...........................................................................................15
CRN (Call Request with Number) .................................................................. 15
CRS (Call Request Using Stored Number) .................................................... 16
DIC (Disregard Incoming Call)....................................................................... 16
61200.015L2-1 DSU III S2W User Manual i
T able of Contents
PRN (Program Number).................................................................................. 16
RLN (Request List of Numbers) ..................................................................... 17
Chapter 3. Operation
Menu Structure ...................................................................................................................... 19
LCD Display of the Main Menu ...................................................................... 19
Main Menu ..................................................................................................................... 20
Status ................................................................................................................. 20
T est..................................................................................................................... 20
Configuration (CONFIG) ................................................................................ 20
Dial..................................................................................................................... 20
Basic Menu Travel........................................................................................................... 21
Front Panel.............................................................................................................................. 23
LCD Window.................................................................................................... 23
Enter .................................................................................................................. 23
Numeric Keypad ............................................................................................... 23
Shift.................................................................................................................... 23
Quick ................................................................................................................. 24
Cancel ................................................................................................................ 24
Up and Down Arrows ...................................................................................... 24
LED Description ............................................................................................... 24
Rear Panel ............................................................................................................................... 25
Chapter 4. Configuration Overview
Local Configuration ............................................................................................................... 27
Chapter 5. Configuring Network Options
Network Options ................................................................................................................... 31
Echo Cancel.....................................................................................................................31
Adapt ................................................................................................................................33
Volume Control ..............................................................................................................34
Chapter 6. Configuring DTE Options
DTE Options........................................................................................................................... 35
DTE Rate.......................................................................................................................... 35
Connector Type .............................................................................................................. 37
Data Format..................................................................................................................... 38
DTE Command Option.................................................................................................. 39
Transmit Clock ...............................................................................................................41
CS Options ......................................................................................................................43
ii DSU III S2W User Manual 61200.015L2-1
T able of Contents
CD Options ..................................................................................................................... 45
TR Options ......................................................................................................................46
SR Options.......................................................................................................................47
Chapter 7. Configuring T est Options
T est Options ........................................................................................................................... 49
Test Timeout ................................................................................................................... 49
Remote Digital Loopback............................................................................................... 50
EIA Local Loopback .......................................................................................................51
EIA Remote Loopback ....................................................................................................52
Chapter 8. Configuring Dial Options
Dial Options ........................................................................................................................... 53
Phone Number ................................................................................................................53
Edit SC#........................................................................................................................... 54
Edit AD# .......................................................................................................................... 55
Auto Answer .................................................................................................................... 55
RS366 EON ..................................................................................................................... 56
Ring Again ....................................................................................................................... 57
Chapter 9. Manual Command
Manual Command ................................................................................................................. 59
Chapter 10. Dial Selection
Dial Options ........................................................................................................................... 63
Dial Stored #....................................................................................................................63
Enter Dial # ..................................................................................................................... 64
Speed Call........................................................................................................................65
Auto Dial ..........................................................................................................................66
Chapter 11. Testing and Troubleshooting
T est Overview ......................................................................................................................... 67
Initiating a Test .............................................................................................................. .68
Test Status Display.......................................................................................................... 69
Exiting a Test................................................................................................................... 69
T roubleshooting ..................................................................................................................... 71
Messages from the DSU/CSU ....................................................................................... 71
Troubleshooting New Installs........................................................................................ 73
Test Sequence for Troubleshooting New Installs or Existing Circuits ...............74
Local Unit Diagnostics ..........................................................................................................75
DTE & Loop (LL)........................................................................................................... 76
61200.015L2-1 DSU III S2W User Manual iii
T able of Contents
Test Description....................................................................................................... 76
Test Purpose............................................................................................................. 76
Initiating ................................................................................................................... 77
Interpreting Test Results .........................................................................................77
Loop Only (RT) ..............................................................................................................78
Test Purpose............................................................................................................. 78
Initiating ................................................................................................................... 78
Interpreting Test Results .........................................................................................79
DTE Only......................................................................................................................... 80
Test Purpose............................................................................................................. 81
Initiating ................................................................................................................... 81
Interpreting Test Results .........................................................................................81
DTE With Test Pattern ................................................................................................... 82
Test Purpose............................................................................................................. 82
Initiating ................................................................................................................... 82
Interpreting Test Results .........................................................................................83
Test Pattern...................................................................................................................... 84
Test Purpose............................................................................................................. 84
Initiating ................................................................................................................... 85
Interpreting Test Results .........................................................................................85
Self Test............................................................................................................................ 86
Test Purpose............................................................................................................. 86
Initiating ................................................................................................................... 86
Interpreting Test Results .........................................................................................86
Remote Unit Diagnostics................................................................................................ 87
Test Purpose............................................................................................................. 88
Initiating ................................................................................................................... 88
Test Results .............................................................................................................. 88
Interpreting Test Results .........................................................................................88
Chapter 12. Status Selection
Status Display .........................................................................................................................89
DSU Operational Status ................................................................................................. 90
Data Mode ......................................................................................................... 90
Network Status................................................................................................................ 90
Incoming Call/DTR Active............................................................................... 90
Data Mode/Loop is Normal ............................................................................ 90
Idle/Loss of TCM Sync ....................................................................................90
DTE Rate.......................................................................................................................... 90
DTE 56K Sync/Tx Clk Norm ..........................................................................90
iv DSU III S2W User Manual 61200.015L2-1
T able of Contents
DTE Clock .......................................................................................................................90
DTE Control Leads and Status ......................................................................................91
Appendix A. A T Commands .............................................................................................. 93
Appendix B. Default Configuration Profiles
Default Configuration Profiles.............................................................................................. 95
Profile 1 ............................................................................................................. 95
Profile 2 ............................................................................................................. 95
Profile 3 ............................................................................................................. 95
Profile 4 ............................................................................................................. 95
Appendix C. DSU to Modem Interconnect
Modem T ail Circuit Application ...........................................................................................99
Appendix D. EIA-232 Connector
56 and 64 kbps Application................................................................................................ 101
Appendix E. Specifications Summary
Specifications and Features................................................................................................. 103
Glossary ............................................................................................................................... 105
Index ..................................................................................................................................... 111
List of T ables
T able 2-A Pin Assignments for T elco Connector .............................................................. 7
T able 2-B Pin Assignments for Primary EIA-232 Connector........................................... 8
T able 2-C Pin Assignments for Primary V.35 Connector ................................................. 9
T able 2-D Pin Assignments for DIALPOR T Connector .................................................. 10
T able 5-A Echo Cancel Commands ................................................................................. 32
T able 5-B Adapt Commands............................................................................................. 33
T able 5-C Volume Level Commands ................................................................................ 34
T able 6-A DTE Rate A T Commands ................................................................................. 36
T able 6-B Data Format Commands.................................................................................. 38
T able 6-C DTE Command Descriptions .......................................................................... 40
T able 6-D T ransmit Clock A T Commands....................................................................... 41
T able 6-E CS Options A T Commands ............................................................................. 43
T able 6-F Short and Long Delays at Different Operating Speeds ................................. 44
T able 6-G CD Options A T Commands ............................................................................ 45
T able 6-H TR Options A T Commands .............................................................................46
T able 6-I SR Options A T Commands ............................................................................. 47
61200.015L2-1 DSU III S2W User Manual v
T able of Contents
T able 7-A T est Timeout A T Commands ...........................................................................50
T able 7-B Remote Digital Loopback A T Commands...................................................... 50
T able 7-C EIA Local Loopback A T Commands............................................................... 51
T able 7-D EIA Remote Loopback AT Commands ........................................................... 52
T able 8-A AT Command for Storing Phone Numbers.................................................... 54
T able 8-B AT Commands for Editing Speed Call Numbers........................................... 54
T able 8-C A T Command for Auto Dialing ....................................................................... 55
T able 8-D At Command for Auto Answer ........................................................................ 56
T able 8-E At Commands for Ring Again ......................................................................... 57
T able 9-A Manual Commands .......................................................................................... 61
T able 10-A A T Command for Dialing Stored Numbers.................................................... 64
T able 10-B A T Command for Dialing a Number .............................................................. 65
T able 10-C A T Command for Speed Calling ..................................................................... 65
T able 10-D A T Command for Auto Dial............................................................................. 66
T able 11-A Messages from the DSU/CSU ......................................................................... 72
T able 1 1-B T r oubleshooting New Installs ......................................................................... 73
T able 11-C T est A T Commands .......................................................................................... 75
T able 1 1-D DTE with T est Pattern Commands ................................................................. 75
T able 1 1-E Remote T ests and A T Commands ................................................................... 87
T able A-A AT Commands .................................................................................................. 93
T able B-A Default Configuration Profiles ........................................................................ 96
List of Figures
Figure 1-1 Sample Point-to-Point Application for DSU III S2W ....................................... 2
Figure 3-1 Example of Basic Menu T ravel ........................................................................ 22
Figure 3-2 DSU III S2W Front V iew ................................................................................. 23
Figure 3-3 DSU III S2W Rear View ...................................................................................25
Figure 4-1 Complete Configuration Menu ....................................................................... 29
Figure 5-1 Setting Echo Cancel Options .......................................................................... 32
Figure 5-2 Enabling/Disabling Adapt ............................................................................... 33
Figure 5-3 Adjusting the V olume Level ............................................................................. 34
Figure 6-1 DTE Rates ..........................................................................................................36
Figure 6-2 Selecting the Connector T ype ......................................................................... 37
Figure 6-3 Selecting Asynchronous or Synchronous Data Format................................. 38
Figure 6-4 Selecting DTE Command Option ................................................................... 39
Figure 6-5 T ransmit Clock Options .................................................................................. 41
Figure 6-6 Selecting CS Options ....................................................................................... 43
Figure 6-7 Selecting CD Options ...................................................................................... 45
Figure 6-8 Selecting TR Options ....................................................................................... 46
Figure 6-9 Setting SR Options ........................................................................................... 47
vi DSU III S2W User Manual 61200.015L2-1
T able of Contents
Figure 7-1 Setting T est T imeout Option ........................................................................... 49
Figure 7-2 Remote Digital Loopback ................................................................................ 50
Figure 7-3 EIA Local Loopback Options .......................................................................... 51
Figure 7-4 EIA Remote Loopback Options ...................................................................... 52
Figure 8-1 Editing Stored Phone Numbers ...................................................................... 53
Figure 8-2 Editing Speed Call Numbers ........................................................................... 54
Figure 8-3 Editing Auto Dial Numbers ............................................................................. 55
Figure 8-4 Enabling/Disabling the Auto Answer Function ............................................. 56
Figure 8-5 Selecting RS366 EON Options........................................................................ 56
Figure 8-6 Selecting Ring Again Options ......................................................................... 57
Figure 9-1 Manual Command............................................................................................ 59
Figure 10-1 Dial Options Menu........................................................................................... 63
Figure 10-2 Path to Storing Numbers ................................................................................. 64
Figure 10-3 Entering Dial Number...................................................................................... 64
Figure 10-4 Path to Speed Calling ....................................................................................... 65
Figure 10-5 Path to Auto Dialing ......................................................................................... 66
Figure 11-1 Normal Operation Before Initiating Loopback T est .................................... 67
Figure 11-2 Initiating a T est ...............................................................................................68
Figure 1 1-3 Sample T est Status Displays........................................................................... 69
Figure 1 1-4 Complete T est Menu....................................................................................... 70
Figure 11-5 DTE & Loop Test............................................................................................ 76
Figure 1 1-6 Initiating a DTE & Loop Test ........................................................................ 77
Figure 1 1-7 Loop Only T est ............................................................................................... 78
Figure 1 1-8 Initiating a Loop Only T est............................................................................ 78
Figure 1 1-9 DTE Only T est Diagram ................................................................................. 80
Figure 1 1-10 Initiating a DTE Only T est ............................................................................. 81
Figure 1 1-1 1 DTE with T est Pattern .................................................................................... 82
Figure 11-12 Initiating a DTE T est with T est Pattern......................................................... 83
Figure 11-13 T est Pattern Only ............................................................................................84
Figure 1 1-14 Initiating a T est Using a T est Pattern ............................................................ 85
Figure 1 1-15 Initiating a Self Test ........................................................................................86
Figure 1 1-16 V.54 Remote Digital Loopback with Test Pattern ........................................ 87
Figure 1 1-17 Initiating a Remote T est ................................................................................. 88
Figure 12-1 Example of Status Displays ............................................................................. 89
Figure C-1 DSU to Modem Interconnect .......................................................................... 99
Figure D-1 EIA-232 Connector ......................................................................................... 101
61200.015L2-1 DSU III S2W User Manual vii
T able of Contents
viii DSU III S2W User Manual 61200.015L2-1
PRODUCT OVERVIEW
The ADTRAN Data Service Unit III Switched 2-W ire (DSU III
S2W) provides a reliable, high speed data connection from a
customer’s Data T erminal Equipment (DTE) thr ough 2-wire
Switched 56 (SW56) network lines. This type of SW56 service is
generally referred to as DA T AP A TH®. The DSU III S2W supports
both synchronous and asynchronous data communication over
SW56 networks.
Chapter 1. Introduction
Chapter 1
Introduction
The DSU III S2W provides both V.35 and EIA-232 electrical and
physical DTE interfaces to accommodate a variety of applications.
A second DB-25 labeled EIA-366/232 pr ovides an EIA-366 parallel
dialing interface. The unit features a receiver capability which
permits operation over loops 14,000 ft on 26 AWG. Figure 1-1
shows a sample point-to-point application for the DSU III S2W .
61200.015L2-1 DSU III S2W User Manual 1
Chapter 1. Introduction
E
C
PCs
P
RINTER
L
ocal
A
rea
N
etwork
BRIDGE/ROUTER
SERVER
DEDICATED
PRIVATE NETWORK
POWER SUPPLYPOWER SUPPLY POWER SUPPLYPOWER SUPPLY
+5V+5V
+12V+12V
-12V-12V
-5V-5V
CHECKCHECK
DSU III ARDSU III AR DSU III ARDSU III AR DSU III ARDSU III ARDSU III ARDSU III AR DSU III S4WDSU III S4WDSU III S4WDSU III S4WDSU III S4WDSU III S4W DSU III DBUDSU III DBUDSU III S4WDSU III S4W DSU III DBUDSU III DBUDSU III DBUDSU III DBUDSU III DBUDSU III DBU DSU S2WDSU S2W DSU S2WDSU S2W DSU S2WDSU S2W
SHELFSHELF
CONTROLLERCONTROLLER
RSRS
RSRS
RSRS
RSRS
RSRS
RSRS
RSRS
RSRS
RSRS
CSCS
CSCS
TDTD
TDTD
RDRD
RDRD
CDCD
CDCD
ALMALM
ALMALM
DTEDTE
DTEDTE
LOOPLOOP
LOOPLOOP
RDLRDL
RDLRDL
PTRNPTRN
PTRNPTRN
ERRORERROR
ERRORERROR
DIALMATE
DIAL STATUS
CANCEL
TEST CONFIG ENTER
SELECTSELECT
SELECTSELECT
TESTTEST
TESTTEST
1 2 3
4 5 6
7 8 9
0
1 1622 33 44 55 66 77 88 99 1010 1111 1212 1313 1414 1515
2 or 4
wire SW56
RSRS
CSCS
CSCS
CSCS
CSCS
CSCS
CSCS
CSCS
CSCS
TDTD
TDTD
TDTD
TDTD
TDTD
TDTD
TDTD
TDTD
RDRD
RDRD
RDRD
RDRD
RDRD
RDRD
RDRD
RDRD
CDCD
CDCD
CDCD
CDCD
CDCD
CDCD
CDCD
CDCD
ALMALM
ALMALM
ALMALM
ALMALM
ALMALM
ALMALM
ALMALM
ALMALM
DTEDTE
DTEDTE
DTEDTE
DTEDTE
DTEDTE
DTEDTE
DTEDTE
DTEDTE
LOOPLOOP
LOOPLOOP
LOOPLOOP
LOOPLOOP
LOOPLOOP
LOOPLOOP
LOOPLOOP
LOOPLOOP
RDLRDL
RDLRDL
RDLRDL
RDLRDL
RDLRDL
RDLRDL
RDLRDL
RDLRDL
PTRNPTRN
PTRNPTRN
PTRNPTRN
PTRNPTRN
PTRNPTRN
PTRNPTRN
PTRNPTRN
PTRNPTRN
ERRORERROR
ERRORERROR
ERRORERROR
ERRORERROR
ERRORERROR
ERRORERROR
ERRORERROR
ERRORERROR
SELECTSELECT
SELECTSELECT
SELECTSELECT
SELECTSELECT
SELECTSELECT
SELECTSELECT
SELECTSELECT
SELECTSELECT
TESTTEST
TESTTEST
TESTTEST
TESTTEST
TESTTEST
TESTTEST
TESTTEST
TESTTEST
PUBLIC SWITCHED
DIGITAL NETWORK
2 or 4
wire SW56
C
DSU III DBUDSU III DBU
1 2 3
ENTER
DAEBF
4 5 6
RS CS TD RD CD ALM TSTRS CS TD RD CD ALM TST
7 8 9
SHIFT SHIFT
#0
CANCEL
*
DSU III S2W
Sample Point-to-Point Application for DSU III S2W
+5V+5V
+12V+12V
-12V-12V
-5V-5V
CHECKCHECK
RSRS
RSRS
RSRS
RSRS
RSRS
CSCS
CSCS
CSCS
CSCS
CSCS
TDTD
TDTD
TDTD
TDTD
TDTD
RDRD
RDRD
RDRD
RDRD
RDRD
CDCD
CDCD
CDCD
CDCD
CDCD
ALMALM
ALMALM
ALMALM
ALMALM
ALMALM
DTEDTE
DTEDTE
DTEDTE
DTEDTE
DTEDTE
LOOPLOOP
LOOPLOOP
LOOPLOOP
LOOPLOOP
LOOPLOOP
RDLRDL
RDLRDL
RDLRDL
RDLRDL
RDLRDL
PTRNPTRN
PTRNPTRN
PTRNPTRN
PTRNPTRN
PTRNPTRN
ERRORERROR
ERRORERROR
ERRORERROR
ERRORERROR
ERRORERROR
SELECTSELECT
SELECTSELECT
SELECTSELECT
SELECTSELECT
SELECTSELECT
TESTTEST
TESTTEST
TESTTEST
TESTTEST
TESTTEST
ISDN
NETWORK
MART 16 SHELF
S
V.32bis
PUBLIC SWITCHED
TELEPHONE NETWORK
V.32bis
BRIDGE/ROUTER
PRINTER
L
ocal
A
rea
N
etwork
Figure 1-1
P
SERV
2 DSU III S2W User Manual 61200.015L2-1
GENERAL DATAP ATH DESCRIPTION
DA T AP A TH is a 2-wire switched digital service offer ed by the local
service provider . The services are generally provided by the
Northern T elecom DMS/SL 100 family of Central Office switches.
DA TAP A TH is always switched, which allows the customer to pay
for high speed data transfer only when a call is active. The dial-up
service is delivered by a 2-wire local loop up to 14,000 feet long on
26 A WG. The DSU III S2W uses a bipolar r eturn-to-zero type of
signal in a ping-pong (Time Compr ession Multiplexing) format.
Another basic component of DA T AP A TH technology is T-Link rate
adaption protocol which adapts user data rates into network
transport bit streams of 56 or 64 kbps. The units will connect and
negotiate the most efficient rate at which to send data. The
ADTRAN DSU III S2W can communicate and rate adapt with any
T-Link compatible device. It can also interface with non T -Link
compatible devices at 56 or 64 kbps, allowing the user to place a
call to a 4-wire SW56 network or ISDN device.
Chapter 1. Introduction
61200.015L2-1 DSU III S2W User Manual 3
Chapter 1. Introduction
WARRANTY AND CUSTOMER SERVICE
ADTRAN will replace or repair this product within five years fr om
the date of shipment if it does not meet its published specifications
or fails while in service. For detailed warranty , repair, and return
information refer to the ADTRAN Equipment Warranty and Repair
and Return Policy Procedure.
Return Material Authorization (RMA) is requir ed prior to returning
equipment to ADTRAN.
For service, RMA r equests, or further information, contact one of
the numbers listed on the inside back cover of this manual.
4 DSU III S2W User Manual 61200.015L2-1
UNPACK, INSPECT , POWER UP
Receipt Inspection
Carefully inspect the DSU III S2W 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 DSU III S2W for repair
or for verification of damage during shipment.
Chapter 2. Installation
Chapter 2
Installation
Equipment Provided
The following items are included in ADTRAN shipments of the
DSU III S2W:
• DSU III S2W unit
• A 6-position modular to 6-position modular line interface cable
• The user manual
Equipment Sold Separately
The customer must provide an EIA-232 interface cable with
standard 25-pin male D-type connectors (Cannon or Cinch DB19604-432) or V.35 cable, and a cable for the EIA-366 Dialport if
used.
61200.015L2-1 DSU III S2W User Manual 5
Chapter 2. Installation
Power Up
Each DSU unit is provided with a captive eight-foot power cord,
terminated by a three-prong plug which connects to a grounded
115 VAC power receptacle. A telco connector is also provided for
interface to the network.
Power to the DSU must be provided from a grounded 115 VAC, 60 Hz
receptacle.
6 DSU III S2W User Manual 61200.015L2-1
NETWORK INTERFACE CONNECTION
The DSU III S2W has a six-position modular jack labeled TELCO.
The connector is used for connecting to the network when the unit
is configured for either dedicated or switched operation. The pin
assignments for the telco connector are listed in T able 2-A.
Pin Name Description
1 Not used
2 Not used
3 T Network interface, tip
4 R Network interface, ring
5 Not used
6 Not used
Chapter 2. Installation
Table 2-A
Pin Assignments for T elco Connector
61200.015L2-1 DSU III S2W User Manual 7
Chapter 2. Installation
(TI)
DTE DATA CONNECTION/PRIMARY DTE
The primary DTE should be connected to either the EIA-232 DTE
connector or the CCITT V.35 DTE connector. The maximum cable
lengths recommended are 50 feet for the EIA-232 and 100 feet for
the CCITT V.35. The pin assignments for the connectors are listed
in Tables 2-B and 2-C.
The V .35 connector is r ecommended for use with data rates above
19.2 kbps. The EIA-232 connector works up to 56 kbps with a low
capacitance cable or with the external transmit clock option
selected. The primary DTE rate is configured from the front panel.
The primary DTE can operate in asynchronous or synchronous
modes.
To prevent possible radio frequency interfer ence emissions, a shielded
cable is required.
Pin Assignments for Primary EIA-232 Connector
Pi n EIA Description
1 AA Protective Ground (PG)
2 BA Transmit Data (TD)
3 BB Receive Data (RD)
4 CA Request to Send (RS)
5 CB Clear to Send (CS)
6 CC Data Set Ready (SR)
7 AB Signal Ground (SG)
8 CF Received Line Signal Detector (C
9 - +12 Test Point
10 - -12 Test Point
15 DB Transmit Clock (TC)
1 7 DD Receive Clock (RC)
18 - Local Loopback (LL)
2 0 CD Data Terminal Ready (TR)
21 - Remote Loopback (RL)
2 2 CE Ring Indicator (RI)
2 4 DA External TX Clock (ETC)
2 5 - Test Indicator
Table 2-B
8 DSU III S2W User Manual 61200.015L2-1
Chapter 2. Installation
(
(
n
n
X
X
)
Table 2-C
Pin Assignments for Primary V .35 Connector
Pin CCITT Description
A 101 Protective Ground (PG)
B 1 0 2 Signal Ground (SG)
C 10 5 Request to Send (RS)
D 1 0 6 Clear to Send (CS)
E 1 0 7 Data Set Ready (SR)
F 1 0 9 Received Line Signal Detector (C
H - Data Terminal Ready (TR)
J - Ring Indicator (RI)
L - Local Loopback (LL)
N - Remote Loopback (RL)
R 10 4 Received Data (RD-A)
T 1 0 4 Received Data (RD-B)
V 11 5 Receiver Signal Element Timing
X 11 5 Receiver Signal Element Timing
P 103 Transmitted Data (SD-A)
S 103 Transmitted Data (SD-B)
Y 114 Transmitter Signal Element Timi
AA 114 Transmitter Signal Element Timi
U 1 13 External TX Signal Element (SC
W 113 External TX Signal Element (SC
NN - Test Indicator (TI
61200.015L2-1 DSU III S2W User Manual 9
Chapter 2. Installation
2
2
DIALPORT CONNECTION
If used, the DTE dialing interface should be connected to the EIA366/232 connector . The DIALPORT connector services an EIA-366
T ype III interface. The pinout for the connector when used as EIA366 is shown in T able 2-D.
Pi n EI A I/O Description
1 Shield I/O Shield for cable
2 DPR I Digit Present
3 ACR O Abandon Call and Ret
4 CRQ I Call Request
5 PND O Present Next Digit
6 PWI O Power Indicator
7 SG I/O Signal Ground
1 3 DSC O Distant Station Conne
1 4 NB1 I Digit LSB
15 NB1 I Digit Bit 2
16 NB4 I Digit Bit 3
1 7 NB8 I Digit MSB
18 RC O Receive Common
19 S C I Send Common
22 DLO O Data Line Occupied
8 thru 1
20, 21,
thru 25
T able 2-D
Pin Assignments for DIALPORT Connector
NC N/A No Connection
10 DSU III S2W User Manual 61200.015L2-1
CONFIGURATION
The DSU III S2W contains four different user profiles (sets of
configurations options) that are stored in read only memory. These
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 pr ofile 1
matches the desired system requirements, then 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 configuration and modify .
When a new profile is loaded or the existing profile is modified, it
is stored in the nonvolatile configuration memory. The DSU III
S2W is then configured with that profile every time power is
turned on or reset. See the chapter Manual Command for information on loading default configuration profiles.
Configuration Methods
The DSU III S2W provides three methods for local configuration:
front panel, A T commands (in-band or via contr ol port), and V.25
bis.
Chapter 2. Installation
Front Panel
The Front Panel provides access to all operation parameters of the
DSU III S2W through a multi-level menu structure which begins
with the four-part Main menu.
ST ATUS - displays status of network and DTE interface
TEST - controls local and remote testing
CONFIG - displays/changes current configuration parameters
DIAL - provides manual dialing functions
61200.015L2-1 DSU III S2W User Manual 11
Chapter 2. Installation
AT Commands
The DSU III S2W can be configured and controlled with in-band
A T commands from an asynchronous DTE port just as modems
are.
T o exit the data mode and enter the command mode, the asynchronous DTE device must transmit a proper escape sequence or three
pluses (+++) to the DSU III S2W . A specified time delay must
occur between the last data character and the first escape sequence
character . This is the guard time delay, and it can be changed by
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 DTE
must transmit the escape code character three times in succession
with delay between each character being less than the guard time.
Once the command mode is entered, A T commands can be
transmitted to the DSU III S2W to configure most of the options or
initiate tests to check both the DSU III S2W and the network
connections. All command lines must begin with the A T character
set in either capital or lower case letters.
The command line may contain a single command or a series of
commands after the A T attention code. When a series of commands is used, the individual commands may be separated with
spaces for readability . The maximum length for a command line is
40 characters. Each command line is executed by the DSU III S2W
upon receipt of a terminating character . The default terminating
character is a carriage return (ASCII 013), but it can be changed by
writing a different value to register S3.
Before the terminating character is transmitted, the command line
can be edited by using the backspace character (ASCII 008) to
erase errors so the proper commands can be entered. Valid A T
commands for the DSU III S2W are listed in the appendix AT
Commands.
12 DSU III S2W User Manual 61200.015L2-1
V .25 bis Commands
When configured for the V.25 bis option, the DSU III S2W accepts
in-band dialing and configuration commands from both synchronous and asynchronous DTE ports.
The V .25 bis option supports the following pr otocols:
• SDLC/HDLC
• Bi-Sync
• Asynchronous
SDLC/HDLC 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. The 03H in the
control field indicates that other frames are to follow while the 13H
in the control field indicates the final frame.
Chapter 2. Installation
Bi-Sync Option
Character Format
• Data bits - 7
• Parity bit - Odd
Command Structure
[SYN][SYN][STX][V.25 bis COMMAND][ETX]
61200.015L2-1 DSU III S2W User Manual 13
Chapter 2. Installation
Asynchronous Option
Command Descriptions
Character Format
• Start bit - 1
• Data bits - 7
• Parity bit - Even
• Stop bit - 1
Command Structure
[V.25 bis COMMAND][CR][LF]
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 local
DSUs. The ADTRAN V.25 bis command set follows:
CIC Connect incoming call
CN L Configuration local
CR N Call request with number
CRS Call request using stored number
DIC Disregard incoming call
PR N Program number
R LN Request list of numbers
The following list contains possible responses to V.25 bis commands:
VAL V alid V.25 command processed
IN V A n invalid command detected
CFIET Call failed on switched network - busy detected
CFIDE Call failed on switched network - no wink detected
CFINS Call failed - no dial string in specified register
INVCU Unknown command detected
INVPS Invalid parameter syntax
INVPV Invalid parameter value
IN C Incoming call
CN X Call connected
14 DSU III S2W User Manual 61200.015L2-1
If verbose (wordy) responses are disabled (A TV0), the following list
of three-character responses are the only ones r eturned:
VAL V alid V.25 command processed
IN V Invalid command received
CFI Call failed
IN C Incoming call
CN X Call connected
Syntax and Possible Responses
CIC (Connect Incoming Call)
This command causes the DSU to go on-line. There are no parameters associated with this command. Possible indications include
V AL, CNX, and CFIxx.
CNL (Configuration Local)
This command is used to pass A T commands to the local modem
via the V .25 bis command pr ocessor . This allows the DSU III S2W
to be configured with A T commands via a synchr onous interface.
The command has the following format:
Chapter 2. Installation
CNL AT[ONE OR MORE AT COMMANDS]
Responses to CNL commands are r eturned in the data format
currently configured. Possible responses include VAL and INVn.
Switched 56 Operation
CRN (Call Request with Number)
When the DSU III S2W is configured for SW56 operation, the CRN
command causes the DSU to dial the supplied number . The
command's format follows:
CRN[NUMBER TO BE DIALED]
If no number is included in the command, the number stored in
dial register number 1 is dialed. If no number is provided and no
61200.015L2-1 DSU III S2W User Manual 15
Chapter 2. Installation
number is stored in dial register number 1, the DSU III S2W
responds with the call failure indication CFINS (Call Failure
Indication Not Stored). Possible responses include VAL, CNX, and
CFIxx.
CR S (Call Request Using Stored Number)
The CRS command causes the DSU III S2W to dial the number
stored in the specified register . The format of this command is as
follows:
CRS [OPTIONAL SPACE][REGISTER NUMBER 1-10]
If this command is issued without the register number parameter ,
the INVPS (Invalid Parameter 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 V alue)
response is returned. Other responses include VAL, CNX, and
CFIxx.
DIC(Disregard Incoming Call)
This command causes the V .25 bis pr ocessor 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 V AL.
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. The 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. The DSU responds
with V AL.
16 DSU III S2W User Manual 61200.015L2-1
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