Connect data modules
Issue 4 October 2002
79555-233-116
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 might 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):
1. at &c1 &d2 q1 s0=1 &w0 &y0
where:
■ at puts the modem in command mode
■ &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 profile 0
■ &Y0 selects the configuration stored in profile 0 to become the
current configuration each time the data module is powered on
Configuring the 7400B for remote administration
1. At the command prompt of your terminal-emulation software or terminal,
enter at&c1&d2&s1s0=1&w0&w1&y0
where:
■ at puts the modem in command mode
■ &c1 tells the modem to respond to DCD
■ &d2 tells the modem to respond to DTR
■ &s1 tells the modem to respond to DSR
■ s0=1 tells the modem to auto answer on the first ring
■ &w0 tells the modem to save changes in profile 0
■ &w1 tells the modem to save changes in profile 1
■ &y0 tells the modem to use profile0 after a power failure
Restoring factory defaults for the 7400B
1. Enter at&F
