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DEFINITY Communications System
APPENDIX A: AT COMMAND SET
7400B Data Module
User’s Guide
Page A-1
APPENDIX A: AT COMMAND SET
This appendix contains an explanation of each AT command accepted
by the 7400B Data Module. Labels used in the descriptions are defined
as follows:
Label Description
Command:
The command is shown as it should be typed. The command may be typed in
uppercase or lowercase. Spaces may be typed between multiple commands on
the same command line for readability, but the spaces are ignored by the 7400B
Data Module.
Function:
Type:
A brief, functional description of the command is provided here.
Type may be immediate or configuration. An immediate command causes the
data module to perform an action as soon as the command is sent (for example,
go off-hook or dial a number). A configuration command modifies a
configuration parameter during the current session.
Arguments:
Many commands accept or require a numerical argument. Whether an
argument is required and the range of acceptable values for the argument is
shown here.
S-Register:
The S-registers consist of 28 1-byte memory locations in the data module,
designated as S0 through S27. The S-registers hold values for defining the
current configuration of the data module. Some commands modify a specific
S-register, and some commands perform an action based on the current value
stored in an S-register. Whether an S-register is modified or read by the current
command is explained here.
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