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AT Command Set
A-22 Issue 2 November 1996
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 — Continued
Label Description
ENTER