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DEFINITY Communications System
CHAPTER 4: OPERATION AND CONFIGURATION
7400B Data Module
User’s Guide
Page 4-9
If nnn is 0 (the factory-default setting), the automatic answer feature is
turned off. The red LED on the front of the data module labeled “AA”
lights when the automatic feature is turned on.
REMOTE SITE USE
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The 7400B Data Module can be used at a remote site as a dedicated
service device to answer incoming data calls, send data to a remote end
device, and then hang up. For example, you may wish to provide access
to a printer from a remote site.
The following is a typical command line you might use for setting up
this operation (spaces are used here for readability, but are not required):
at &c1 &d2 q1 s0=1 &w0 &y0
[ Enter ]
Following the at prefix, the commands in the example produce the
following results:
&C1
sets the Data Carrier Detect (DCD) circuit of the data module
to operate according to the EIA standard.
&D2
sets the data module to go on hook when an on-to-off transition
is detected on the Data Terminal Ready (DTR) input, disconnecting
the call
Q1
turns off the result codes that would be the normal responses of
the data module to commands that it receives.
S0=1
turns on the automatic answer feature and causes the data
module to answer an incoming data call on the first ring.
&W0
causes the current configuration to be stored in data profile
storage location 0.
&Y0
selects the configuration stored in data profile storage location
0 to become the current configuration each time the data module is
powered on
Refer to Appendix A, “AT Command Set,” for a complete description
of each command used in this section.
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RESET AND
CONFIGURATION RECALL
Two commands are available for recovering from various data
communications problems. You can reset the 7400B Data Module and
recall one of two stored data profiles as the current configuration. The
form for this command is as follows:
atz
where n is the number 0 or 1, representing the data profile to be recalled.
n
[ Enter ]