User's Guide
Table Of Contents
- Table of Contents
- About This Document
- 1. Introduction
- 2. Installation
- 3. Configuration and Operation
- 4. Troubleshooting
- A. AT Command Set
- B. Dial Modifiers
- C. S-Registers
- D. Isolating Problems Using Loopback Data Tests
- E. Quick-Reference Summaries
- Glossary
- Index
8400B Plus Data Module User’s Guide
555-020-709
Issue 2
November 1996
Isolating Problems Using Loopback Data Tests
D-15
Loop-Around Data Test Arrangement
Also set the correct installation options by typing the appropriate command:
■ If the 8400B Plus Data Module is the US Configuration, type:
ATS24=1
■ If the 8400B Plus Data Module is the International Configuration, type:
ATS24=3
You should now disconnect the terminal from the 8400B Plus Data Module. The
8400B Plus Data Module will retain the option settings during power removal.
A loopback plug must now be connected to the EIA Connector Interface of the
8400B Plus Data Module. A loopback plug connects pin number 2 to pin
number 3 on the 8400B Plus Data Module’s EIA Interface using a modified 9-pin
connector. The modified connector is shown in Figure D-9
.
Figure D-9. 9-Pin Connector Wired as a Loopback Plug
ENTER
ENTER
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