User`s manual

U.S. Robotics I -modem Command Reference
Using the AT Command Set • Page 1-2
¥ You can leave zeros off commands because a missing numeric parameter is assumed to
be a zero. For example,
ATE <Enter> is equivalent to ATE0 <Enter> .
¥ You can create compound commands of up to 60 characters between
AT and <Enter> .
Spaces donÕt add to the count, but hyphens and parentheses do.
HereÕs an example:
AT&K3X2DT5551234 <Enter>
Basic AT Commands
A/ Reexecute the last-issued command. Do not type AT or press Enter.
AT Attention; a command follows.
&K3 Disable MNP5 data compression; use only V.42bis
compression.
X2 Use the X2 result code subset.
DT Dial the following number using tone dialing.
<Enter> Send the commands.