US Robotics COURIER - Page 29

COURIER HIGH SPEED MODEMS
4. Check to see if your computer or terminal and modem are
communicating with each other by sending 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 <Enter>
If everything is correct, the modem responds as follows:
OK
NOTE: The modem is shipped with DIP switch 4 OFF,
causing the modem to display (echo) your keyboard
commands. 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 <Enter>
If double characters appear on the screen, both your modem
and software are set to local echo ON. Either set your soft-
ware to local echo OFF, or turn the modem's echo OFF with
the following command.
ATEO <Enter>
Troubleshooting
If no OK appears on your screen, review the following
checkpoints.
a.
Make sure you type all upper or lower case letters and press
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<Enter>. -
b.
Check to see that you set your communications software to
the correct serial port.
c. Make sure your software has put the computer in Terminal
mode, so that you can send the modem commands. Then
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review Step 4, above. -
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2-8 Set-up and Testing
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