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-16
Loop-Around Data Test Arrangement
Using the Loop-Around Data Test
Arrangement
The user calls the Loop-Around Data Test Arrangement from a terminal/PC.
Once connected, the user checks to see if characters entered from the
keyboard are successfully echoed back. If the terminal/PC is set for full duplex
and the user types in
The cat
then
The cat
is echoed back in a successful test.
If the terminal/PC is set for half duplex, then characters will be duplicated. For
example, if set for half duplex (local echo) and the user slowly types in
The cat
then
TThhee ccaatt
is echoed back in a successful test.
020709_2.book Page 16 Friday, April 23, 1999 5:39 AM