USRobotics V.34 User Manual

Page 26

COURIER HIGH SPEED MODEMS

External Modem Set Up 2-7

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 through which the modem is connected
to the computer.

c. Make sure your software has put the computer in

Terminal mode, so that you can send the modem
commands. Then review Step 4, on the previous page.

d. Be sure that DIP switches 1 and 6 are set ON or OFF

according to your terminal or software requirements.
The table in Appendix B explains each function, and
you may also need to review your terminal or
communications software documentation.

e. If you set DIP switch 8 OFF, for Dumb mode, reset the

modem to Smart mode: set DIP switch 8 to ON.

The modem is shipped with DIP switch 3 ON, enabling
the result codes. If DIP switch 3 is OFF, set it to the ON
position. Then initiate the new switch setting with the
following reset command:

ATZ