Modemulator User Guide
Page
32
of
113
Chapter 4: Command Reference
This section includes information about:
Using the AT Command Set
Modemulator Memory
AT Command Reference Guide
Using the AT Command Set
Overview
If Modemulator mode is enabled by the
on the front panel, and if no connection is in-
progress, AT commands can be sent to the Modemulator Terminal port to change Modemulator settings.
To send AT commands to the Modemulator, run a terminal emulation application on a computer,
configured so the selected COM port sends whatever is typed to the computer RS-232 serial port that is
attached to the Modemulator. By default, the Modemulator will echo commands back to the terminal.
General rules for using AT commands
Here are some general guidelines for sending AT commands to the Modemulator:
Type
AT
before each command and press
ENTER
after each command.
The exceptions are
A/
and
+++
, which require neither
AT
nor
ENTER
.
Leave zeroes off the end of AT commands. A missing numeric parameter is assumed to be a zero. For
example,
ATE
is equivalent to
ATE0
.
Either use
AT
(all caps) or
at
(all lower case). Mixed case, as in
At
for example, is unacceptable.
Create compound commands of up to 58 characters between
AT
and
ENTER
.
Example:
AT&H1 D(847)555-1234
AT
Attention; a command follows.
&
H1
Enable hardware flow control.
D
Dial the following number.
Optional hyphens, spaces, and parentheses add to the count of 58 characters.
Commands not recognized will be accepted and ignored.
