USRobotics V.34 - Manual (Page 36)

COURIER HIGH SPEED MODEMS
Internal Modem Set Up 3-9
3. Perform the function that lets you send AT commands to
the modem, that is, puts the computer in Terminal mode.
Some communications programs do this automatically upon
loading. Others require you to display a communications or
terminal screen, type a Function key, or perform some other
operation.
Review your communications software documentation for
instructions.
4. Send the following attention command. Type either upper
or lower case letters, not a combination, and then press the
Enter (Carriage Return) key, shown in the example below
between angle brackets. (Don't type the angle brackets.)
AT
If everything is correct, the modem responds as follows:
OK
Go on to step 5.
Troubleshooting
If your entered command is not displayed, your local echo is
OFF. To turn the local echo ON, send the modem the
following command:
ATE1
If double characters appear on the screen, both your modem and
software are set to local echo ON. Either set your software
to local echo OFF, or turn the modem's echo OFF with the
following command:
ATE0
If no OK appears on your screen after you completed Step 4,
review the following checkpoints:
a. Make sure you type all upper or lower case letters and
press .
b. Check to see that you set your communications
software to the correct serial port. The correct serial
port is the port to which the modem is connected to the
computer.