Apple Express Fax/Modem - Manual (Page 154)

Common problems
In terminal mode, I type AT and press Return once, but don’t get an
OK response.
m If you’re unable to get the OK response, check that all telephone cables are
securely in place and that your software displays the correct settings.
m If you still have trouble getting your modem to work, see the service and
support information that came with your computer for a number to call.
I want to reset the modem.
You can reset your modem—that is, return it to the original factory default
setting—by using an AT command.
m To reset your modem, type the direct command “AT&F”.
The AT commands may not be echoed on the screen when you type them.
Resetting the modem should also correct this problem.
I see unreadable characters mixed in with normal characters.
You may see a strange mix of characters in an otherwise readable message.
This may be due to noise or interference on the telephone line.
m Wait a while. The problem may go away by itself.
m If the problem persists, hang up then redial.
I have Call Waiting and experience loss of connection
If you use your modem on a telephone line with Call Waiting, you run the
risk of being disconnected or losing data when someone else tries to call. The
best solution is to temporarily disable Call Waiting if possible. In certain
cases, you may solve the problem by placing *70 or *71 in your dial string,
either before or after the number you are dialing.
Call Waiting will return as soon as you hang up. You will have to disable it for
each telephone call. Call Waiting can also be disabled for fax.
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