Motorola DDS/MR64 Owner's manual

DDS/MR64
Installation and Operation
Motorola
5000 Bradford Drive
Huntsville, AL 35805-1993
Doc No. 6 456 5246 02 014
October 1994
© 1994 Motorola

ii
COPYRIGHT
Copyright 1994 Motorola Inc.
Published by Motorola, who reserves the right to make improvements in the products
described in this manual as well as to revise this publication at any time and without notice to
any person of such revision or change.
All rights reserved. No part of this publication may be reproduced, transcribed, stored in an
electronic retrieval system, translated into any language or computer language, or be trans-
mitted in any form whatsoever without the prior written consent of the publisher. For addi-
tional information contact
Motorola
5000 Bradford Drive
Huntsville, Alabama 35805-1993
[phone]
TRADEMARKS
Motorola® is a registered trademark of Motorola, Inc.
NOTICE
All titles, versions, trademarks, claims of compatibility, etc., of hardware and software prod-
ucts mentioned herein are the sole property and responsibility of the respective vendors.
Motorola makes no endorsement of any particular product for any purpose, nor claims
responsibility for its operation and accuracy.
UPDATES
Updates to the products and the manual are obtainable at participating Motorola dealers and
distributors, or directly from Motorola on the same terms and conditions as those offered by
Motorola to its registered customers as verified by the completion and return of the registra-
tion form to Motorola.

iii
FCC REQUIREMENTS
This equipment complies with FCC Rules Part 68. Please note the following:
•When you order service, the telephone company needs to know the Facility Interface
Code.
•The Service Order Code: 6.0F
•The USOC jack required: RJ48S
In addition, if requested, please inform the telephone company of the make, model number,
and FCC registration number, which are on the equipment label.
The telephone company may change technical operations or procedures affecting your equip-
ment. You will be notified of changes in advance to give you ample time to maintain uninter-
rupted telephone service.
If you experience trouble with this telephone equipment, please contact
Motorola
5000 Bradford Drive
Huntsville, AL 35805-1993
USA
Telephone: [phone]
for information on obtaining service or repairs. The telephone company may ask that you
disconnect this equipment from the network until the problem has been resolved. If your
equipment continues to disrupt the network the telephone company may temporarily discon-
nect service. If this occurs you will be informed of your right to file a complaint with the
FCC. WARNING
This equipment uses, generates, and can radiate radio frequency energy interfering with radio
communications if not installed and used in accordance with the instruction manual. It has
been tested and complies with the limits for a Class A computing device according to FCC
Rules, Part 15. Operation of this equipment in a residential area may cause interference. If it
does, you must correct the cause of the interference. Shielded cables may be necessary with
this unit to ensure compliance with the Class A limits.
Changes or modifications to this unit not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
Type of Service Facility Interface Code
2.4 kbps-DDS 04DU5-24
4.8 kbps-DDS 04DU5-48
9.6 kbps-DDS 04DU5-96
19.2 kbps-DDS 04DU5-19.2
56 kbps-DDS 04DU5-56
64 kbps-DDS 04DU5-64

iv

DDS/MR64 v
PREFACE
This manual is written for users of the DDS/MR64. Please read the
appropriate chapters before you change any option on the printed circuit
board, change dip switches, or operate the unit. The manual includes
the following:
Chapter 1 Introduction - Contains introductory information and
equipment description;
Chapter 2 Installation - Contains installation and start-up instruc-
tions;
Chapter 3 Operation - Describes operation of the DDS/MR64;
Chapter 4 Configuration - Describes selectable options and how to
apply them;
Chapter 5 Diagnostics - Describes test data loops and features;
Chapter 6 Troubleshooting - Describes tests and indications used
to locate or isolate malfunctions;
Chapter 7 Non-DDS applications - Describes the use of the DDS/
MR64 as a limited distance modem;
Chapter 8 Rate Adaption Option - Describes operating characteris-
tics and options that are specific to rate adaption;
Chapter 9 Maintenance - contains maintenance information;
Appendix A Specifications.
Index

vi
STATEMENT OF APPLICATION
This manual supports both the standalone and shelf mount units. Opera-
tion and function of either unit is identical. Where necessary, this
manual provides detailed information in support of the standalone unit.
Detailed information in support of the shelf mount unit can be found in
the shelf installation and operation manual.

DDS/MR64 vii
DDS/MR64
Chapter 1 Introduction
GENERAL ................................................................................ 1-1
PHYSICAL DESCRIPTION .................................................... 1-1
FUNCTIONAL ......................................................................... 1-1
FEATURES ............................................................................... 1-3
COMPATIBILITY .................................................................... 1-3
COMPLIANCE ........................................................................ 1-3
Chapter 2 Installation
RECEIPT INSPECTION .......................................................... 2-1
SITE PREPARATION .............................................................. 2-1
HARD OPTIONS ..................................................................... 2-1
INSTALLATION ...................................................................... 2-1
Chapter 3 Operation
GENERAL ................................................................................ 3-1
DATA TERMINAL EQUIPMENT (DTE) ............................... 3-1
DTE INTERFACE CONNECTORS ........................................ 3-1
Request to Send ...................................................................... 3-3
Clear to Send .......................................................................... 3-3
Transmitter Clock .................................................................. 3-4
Transmit Data ......................................................................... 3-4
External Clock ....................................................................... 3-4
Received Line Signal Detector .............................................. 3-4
Receive Clock ........................................................................ 3-5
Receive Data .......................................................................... 3-5
Data Set Ready ....................................................................... 3-5
No Signal ................................................................................ 3-5
GROUNDING .......................................................................... 3-5
Protective Ground .................................................................. 3-5
Signal Ground ........................................................................ 3-5
DTE INITIATED TEST SIGNALS .......................................... 3-6
Local Line Loopback.............................................................. 3-6
Remote Terminal Loopback.................................................... 3-6
Remote Loopback................................................................... 3-6
Test Pattern.............................................................................. 3-6

Table of Contents
viii DDS/MR64
Test Mode ................................................................................ 3-6
DDS SYSTEM INTERFACE .................................................... 3-7
SEALING CURRENT .............................................................. 3-7
FRONT PANEL INDICATORS ................................................ 3-8
Pushbuttons ............................................................................. 3-8
LCD ........................................................................................ 3-9
LED’s ...................................................................................... 3-9
Power Switch .......................................................................... 3-9
Chapter 4 Configuration
GENERAL ................................................................................ 4-1
CONFIGURATION ON POWER-UP ...................................... 4-1
CONFIGURATION OPTION DESCRIPTIONS ...................... 4-2
Timing ..................................................................................... 4-2
Rate ......................................................................................... 4-2
Synchronous/Asynchronous.................................................... 4-2
Bits Per Word........................................................................... 4-2
RTS Control............................................................................. 4-3
Buffer....................................................................................... 4-3
Loopback ................................................................................. 4-3
DSR ......................................................................................... 4-3
System Status........................................................................... 4-4
Circuit Assurance .................................................................... 4-4
RTS/CTS Delay....................................................................... 4-4
64 k Scrambler ........................................................................ 4-4
OPTION SELECTION .............................................................. 4-5
Front Panel Option Selection .................................................. 4-5
Front Panel Initiated Tests ...................................................... 4-6
Configuration Option Menu ................................................... 4-6
STRAP/SWITCH CONFIGURATION ..................................... 4-11
Cover Removal ....................................................................... 4-12
Replacing the Cover ............................................................... 4-12
Front Panel Option .................................................................. 4-14
Chassis Signal Ground ............................................................ 4-14
DTE Interface ......................................................................... 4-15
Chapter 5 Diagnostics
TEST FEATURES ..................................................................... 5-1

Table of Contents
DDS/MR64 ix
Remote Terminal Loopback.................................................... 5-1
Local Line Loopback.............................................................. 5-1
Local Line Loopback with Test Pattern.................................. 5-3
Remote Loopback................................................................... 5-3
Remote Loopback with Test Pattern....................................... 5-5
Test Pattern.............................................................................. 5-6
Chapter 6 Troubleshooting
GENERAL ................................................................................ 6-1
NS LED ON .............................................................................. 6-1
OS LED ON .............................................................................. 6-1
TM LED ON ............................................................................. 6-1
TM LED FLASHING ............................................................... 6-1
SELF TEST................................................................................ 6-2
END-TO-END TEST ................................................................ 6-2
LOCAL LOOPBACK TEST..................................................... 6-2
REMOTE LOOPBACK TEST.................................................. 6-2
REMOTE LOOPBACK WITH TEST PATTERN .................... 6-3
Chapter 7 Non-DDS Applications
GENERAL ................................................................................ 7-1
INSTALLATION ...................................................................... 7-1
TIMING .................................................................................... 7-2
OPTIONS .................................................................................. 7-3
TESTS ....................................................................................... 7-3
Chapter 8 Rate Adapter Option
GENERAL ................................................................................ 8-1
FRONT PANEL DISPLAY ...................................................... 8-1
Operating Distance ................................................................. 8-1
RATE ADAPTER CONFIGURATION OPTIONS .................. 8-2
Timing .................................................................................... 8-2
Rate ........................................................................................ 8-2
Chapter 9 Maintenance
GENERAL ................................................................................ 9-1
FUSE ......................................................................................... 9-1
MAINTENANCE ..................................................................... 9-1

Table of Contents
x DDS/MR64
Appendix A Specifications

DDS/MR64 1-1
Chapter 1
Introduction
GENERAL
The Motorola DDS/MR64 is a digital data unit that allows you to
connect your computer or other DTE unit directly to the digital network
without any other network access device. The unit pumps data at up to
64 kbps in point-to-point or multipoint applications. It combines the
functions of a data service unit and a channel service unit (DSU/CSU)
into a single compact unit.
In addition to offering Digital Data Service (DDS) operation, the DDS/
MR64 can operate as a short haul modem providing full-duplex, serial
data communications with either synchronous data from 2.4 to 64 kbps
or asynchronous data from 2.4 to 19.2 kbps over a privately owned 4-
wire, unloaded, twisted-pair cable system.
The DDS/MR64 is also capable of running asynchronous DTE rates of
38.4 kbps or 57.6 kbps over 56 kbps or 64 kbps lines, synchronous DTE
rates of 19.2 kbps or 9600 bps over 56 kbps or 64 kbps lines, and a
synchronous or asynchronous DTE rate of 1200 bps over a 2400 bps
line.
PHYSICAL DESCRIPTION
The DDS/MR64 is a standalone desktop unit. The front panel (Figure 1-
1) contains six Light Emitting Diodes (LED’s), three pushbuttons, and
an LCD screen. The rear panel (Figure 1-2) contains a power cord,
power switch, fuse, DTE connector, and a standard 8-pin DDS jack. The
DTE interface connects to the Data Terminal Equipment and the 8-pin
jack connects to the DDS line. Internally the unit contains one printed
circuit board.
FUNCTIONAL
The DDS/MR64 processes serial synchronous or asynchronous digital
data from the DTE for transmission over the DDS network or other
limited distance 4-wire, unloaded, twisted-pair cable systems. The
receiver contains an automatic equalizer which compensates for the
distortion and attenuation caused by the length of the line without any
adjustments by the user.

Introduction
1-2 DDS/MR64
Figure 1-1
Front Panel
Figure 1-2
Rear Panel
OS NS TD
DDS/MR64
RDCS
YES
TM
NO HOME
POWER
ON
OFF
1/4 AMP
S.B.
DTE
DDS
115 VAC
60 HZ
1/4 AMP

Introduction
DDS/MR64 1-3
FEATURES
•Data rates from 2.4 kbps to 64 kbps synchronous and 2.4 kbps to
19.2 kbps asynchronous
•Direct connection to the DDS network
•Point-to-point or multipoint transmission
•Bipolar return to zero signaling
•LED indication
•Short haul modem capability up to 150,000 feet providing full-
duplex operation on 4-wire private telephone lines.
•Full feature diagnostics
•Liquid Crystal Display (LCD) allow the operator to review or
change settings
•Front panel pushbutton configuration and operation
•Nonvolatile memory for configuration storage
•RS232 or CCITT V.35 DTE interface can be selected by switches
on the circuit board
•Asynchronous 38.4 kbps or 57.6 kbps DTE rates over 56 kbps or 64
kbps DDS lines.
•Synchronous 19.2 kbps or 9600 bps over 56 kbps or 64 kbps lines.
•Synchronous or asynchronous 1200 bps over 2400 bps lines.
COMPATIBILITY
Compatible with the Motorola DDS/MR series of products with the
exception of running the DDS/MR1 or the DDS/MR56 at 64 kbps.
Compatible with Bell 500 Series DSU and CSU equipment.
COMPLIANCE
Compliant with specifications listed in Bell publications 62310 and
41450.

Introduction
1-4 DDS/MR64

DDS/MR64 2-1
Chapter 2
Installation
RECEIPT INSPECTION
After unpacking the equipment, check the contents against the packing
list. Inspect the equipment carefully for damage that may have occurred
in shipment. If there is damage or material shortage, contact the ship-
ping agent and Motorola for advice and assistance. You should keep the
shipping container and packing material for future shipment.
SITE PREPARATION
Install the unit within 6 feet of a 115 or 230 Vac grounded outlet as
required for the specific model and no further than 50 feet from the
terminal equipment.
The installation area should be clean, well lighted, and free from
extremes of temperature, humidity, appreciable shock, and vibration.
Allow sufficient space at the rear of the unit for signal line and interface
cable clearance.
HARD OPTIONS
The PC card has two strap options that should be verified or changed
prior to installation. These options are factory set for standard installa-
tions. The factory options are described in Chapter 4. If a hard option
requires changing, follow the instructions in Chapter 4 before
continuing installation.
INSTALLATION
Figure 2-1 and Figure 2-2 illustrate typical installation.
•Connect the DTE cable to the 25-pin DTE connector. Secure the
two screws to complete the connection.
•Connect the opposite end to the DTE port.
•Insert the 8-pin plug into the rear panel DDS jack labeled DDS.
•Insert the opposite end into the TELCO DDS system.
•Plug in the ac power cord.
•Place the power switch ON.

Installation
2-2 DDS/MR64
The DDS/MR64 will now perform all functions as determined by option
configuration (Chapter 4).
Figure 2-1
Connection Using the RJ48 Jack
POWER
ON
OFF
1/4 AMP
S.B.
DTE
DDS
115 VAC
60 HZ
1/4 AMP
DTE
cable
RJ48 jack
EIA-232 25-pin
connector to DTE
DDS
8-pin
Power
cord

Installation
DDS/MR64 2-3
Figure 2-2
Connection Using the 42A Block
POWER
ON
OFF
1/4 AMP
S.B.
DTE
DDS
115 VAC
60 HZ
1/4 AMP
42A block
EIA-232 25-pin
connector to DTE
Power
cord
DDS
8-pin
ON
Red
Terminal block
To
central
office
Screw terminal
To
modem
Green
Black
Orange
Brown
Blue
Gray
Yellow
TX Pair
RX Pair
DTE
cable

Installation
2-4 DDS/MR64

DDS/MR64 3-1
Chapter 3
Operation
GENERAL
After completing installation, the unit is ready for operation and config-
uration. Most configuration options are soft options and are selected by
the LCD and pushbuttons. Therefore, operation of the unit should be
understood prior to option selection. Hard options are described at the
end of Chapter 4.
The DDS/MR64 requires no start up procedure. After installation and
configuration, the DDS/MR64 will perform all configured functions.
DATA TERMINAL EQUIPMENT (DTE)
The DTE interface to the DDS/MR64 is through a 25-pin, D-type
connector. The sense levels and impedances conform to either EIA-232
or CCITT V.35 INTERFACE depending on the option switch selected.
The type of DTE interface selected in the unit is displayed on power-up.
DTE INTERFACE CONNECTORS
Pin functions of the DTE interface connector are listed in Table 3-1 and
Table 3-2.
Table 3-1. CCITT/EIA-232 Connector
Circuit Function Pin
CCITT/
RS-232
Protective ground 1 101/AA
Signal ground 7 102/AB
Request to Send (RTS) 4 105/CA
Clear to Send (CTS) 5 106/CB
Data Set Ready (DSR) 6 107/CC
Received Line Signal Detector (RLSD) 8 109/CF
Test mode † 25 142
No signal † 12 110/CG
Rx data 3 104/BB
Rx clock 17 115/DD
Tx clock 15 114/DB

Operation
3-2 DDS/MR64
*Can be disabled by front panel pushbuttons
† Selected by DTE interface dip switches
Circuit Function Pin
CCITT/
RS-232
Tx data 2 103/BA
External clock 24 113/DA
Remote loopback * 21 140
LL loopback * 18 141
RT loopback * 11
Test Pattern * 22
+12 V † 9
- 12 V † 10
Table 3-2. V.35 Connector
Circuit Function “D”
Connector Pin V.35 Connector Pin
Protective ground 1 A
Signal ground 7 B
Request to Send (RTS) 4 C
Clear to Send (CTS) 5 D
Data Set Ready (DSR) 6 E
Received Line Signal Detector
(RLSD) 8F
Test mode † 25 K and NN
No signal † 12 M
Rx data A 3 R
Rx data B 16 T
Rx clock A 17 V
Rx clock B 19 X
Tx clock A 15 Y
Tx clock B 13 AA
Tx data A 2 P
Table 3-1. CCITT/EIA-232 Connector (Continued)