Configuration and Operation
3-16 Issue 2 November 1996
■D is the dial command.
■9 represents the access code required to dial a number outside your
PBX domain.
■The remainder of the line is the telephone number.
In the second line of this example, the 8400B Plus Data Module indicates that it
detected a busy signal, and the call is automatically disconne cted.
A Sample On-Line Session This section outlines how to perform a simple on-line session using th e AT
commands described in this chapter. For more information about all AT
commands, see Chapter 3 and Appendix A.
Starting the Session The following is a sample data call to a fictitious bulletin board servic e. If you
know the number of a “real” bulletin board service, you might try an a ctual log
on by using that number and following the suggestions in this session.
AT D 9-555-7575
CONNECT 1200
The D command is used to dial the number of the bulletin board. Since the
connection was made successfully, the 8400B Plus Data Module responded
with a message that says the remote end connected and the data speed to be
used is 1200 bps. If this does not match the speed of your terminal or PC, y ou
must adjust the speed of the terminal or PC to 1200 bps.
The remote end may do nothing until you press a particular key a few times,
usually . Typical of many data communications application programs, this
sometimes required input lets the remote end determine whether you have
connected with the correct communications parameters in effect.
ENTER
ENTER