USRobotics V.34 - Manual (Page 39)

COURIER HIGH SPEED MODEMS
4-2 Data Mode Operations
3. All commands except A/, A> and +++ are preceded by
the AT ( attention) prefix and are executed with the
Enter/Carriage Return key ().
4. Command length = 60 characters maximum. The
modem doesn't count the AT prefix, Carriage Return
character, or spaces. It counts (but doesn't act on)
punctuation such as hyphens and parentheses.
5. A missing numeric parameter is assumed to be zero, as
in the command to hang up: ATH is the
equivalent of ATH0 .
Example (spaces are not required, but are added here for
readability):
AT &K3 X2 DT 071 312 1234
AT Attention; a command follows.
&K3 Disable MNP5 data compression; use only
V.42
bis compression.
X2 Use the X2 result code subset.
DT Dial the following number using tone dialing.
Execute the commands.
This chapter groups related commands into the following
categories.
• Basic Commands
• Dialing/Answering
Dialing
Dial Options
Cancel Dialing
Store Phone Numbers
Redialing
Answer Mode
Auto Answer
Hanging Up
• Setting/Using Defaults
Customizing NVRAM
Resetting the Modem