Verilink 400 User Manual

P

RODUCTIVITY SERIES

DSU/CSU

®

TRANSPORT

400

DDS

34-00222

October 1997

1 16

C

OPYRIGHT/LIABILITY

4. Customer Service

TxPORT provides easy access to customer support information 24 hours a day,
seven days a week through a variety of services including telephone, e-mail,
and the world wide web.

© 1997 TxPORT, All rights reserved. No part of this publication m ay
be reproduced, transmitted, transcribed, stored in a retrieval system, or
translated into any language in any form by any means without the
written permission of TxPORT.

Reorder # 34-00222

nd

Edition, October 1997

2

TxPORT shall not be liable for errors contained herein or for incidental
or consequential damages in connection with the furnishing, perfor­mance, or use of this material. TxPORT reserves the right to revise this
publication from time to time and make changes in content without
obligation to notify any person of such revision changes.

Contents of this publication may be preliminary and/or may be changed
at any time without notice and shall not be regarded as a warranty.

Telephone

To speak directly wit h a TxPORT customer service representative or send a fac­simile you may dial any one of the following numbers.

Toll Free: 800-926-0085 or 888-4TxPORT
Local: 205-772-3770
FAX: [phone]

E-mail

You can request sales and marketing information or pose a technical support
question about your TxPORT product with direct e-mail access.

Sales & Marketing:[e-mail]
Technical Support: [e-mail]

World Wide Web

You can access product informatio n, technical support, news releases and mo re
from our world wide web site by entering our URL into your internet browser.

http://www.txport.com

Documentation Disclaimer
TxPORT makes no representation or warranties of any kind whatsoever

with respect to the contents hereof and specifically disclaims any
implied warranties of merchantability or fitness for any particular pur­pose.

2

15

V.54 Channel Loop:

mand. This loop is unidirectional and returns the DSU receive data to the DSU trans­mit data, and subsequently the DDS transmit data. Receive data is unaffected and
DSR and RLSD are forced Off.

Remote Channel Loop:

the RL position. This starts an internal test by replacing the DSU’s transmitted data
with the V.35 activate code to the far end DSU equipment for the proper time period.
Then a test pattern is sent to verify the looped DDS DSU’s integrity. If the transmit­ted pattern is received error free, the test lamp turns green . If errors are det ected, the
test lamp turns red. Normal DSU operation may resume for DCE BERT testing.
Placing the switch in the NORM position transmits the V.54 deactivate code.

This loop is activated by the receipt of the V.54 loop com-

This loop is activated by pressing the front panel switch to

Looping Diagrams

T

ABLE OF

1. Introduction

Specifications ............................................................................................. 4

FCC Requirements .................................................................................... 5

Warranty .................................................................................................... 6

Ordering Information ................................................................................. 7

2. Installati on

.......................................................................... 4

............................................................................ 8

C

ONTENTS

Local Loopback

DTE

Remote Channel Loop

(V.54) and Data Set Loop

DTE

Channel Loop (Mandatory Loop)

DTE

NET

NET

NET

Supplied Materials ..................................................................................... 8

Unit Configuration ..................................................................................... 8

Connections...............................................................................................10

DDS Network Connection .............................................................. 10

V.35 and RS-232 Port Connection .................................................. 10

3. Operation

Testing ...................................................................................................... 13

4. Customer Service

Telephone...................................................................................................15

E-mail........................................................................................................15

World Wide Web........................................................................................15

............................................................................13

........................................................ 15

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