Lucent Technologies AT&T 7400B - Manual (Page 61)

APPENDIX A: AT COMMAND SET DEFINITY Communications System
7400B Data Module
Page A-14 User’s Guide
Command:
Function:
Type:
Arguments:
S-Register:
Example:
Comments:
See Also:
&F
Load the factory-default configuration.
immediate
none
none
at&f [ Enter ]
The factory-default configuration values are permanently stored in
ROM and can be recalled at any time. No reset or self-test is initiated
by issuing the
&F command.
Chapter 4, “Operation and Configuration.”
Command: &S
Function: Data Set Ready (DSR) options.
Type: configuration
Arguments: The &S command accepts one of two arguments as follows:
0 - (or no argument) the DSR circuit is maintained on at all times
(factory-default setting)
1 - the DSR circuit operates according to the EIA-232-D standard.
S-Register: Bit 6 of S21 is set according to the argument used with the &S
command.
Example: at&s1 [ Enter ]
Comments: In the example, the DSR circuit is configured to operate according to
the EIA-232-D standard. Regardless of which option is currently in
effect, the DSR circuit of the 7400B Data Module is always off during
self-test, and turns off for 0.5 second during a disconnect sequence.
See Also: Chapter 4, “Operation and Configuration.”