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
AT Command Set
A-22
Command: &C
Function: Data Carrier Detect (DCD) options.
Type: configuration
Arguments: The &C command accepts one of two arguments as
follows:
0 — (or no argument) maintain the DCD circuit
on
at all
times (factory-default setting).
1 — the DCD circuit operates according to the
EIA/TIA-574 standard.
S-Register: Bit 5 of S21 is set according to the argument used with
the &C command.
Example: AT&C1
Comments: In the example, the DCD circuit operates according to
the EIA/TIA-574 standard. This would be an appropriate
setting for when the 8400B Plus Data Module is used at
a remote site.
Regardless of which option is currently in effect, the
DCD circuit of the 8400B Plus Data Module is always off
during self-test.
See Also: S-register S21 on page C-25
.
Table A-1. Accepted AT Command Labels
Label Description
ENTER
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