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Troubleshooting
Table A-3 provides some solutions to problems that can occur
when your modem tries to answer or originate a call.
Table A-3. Modem — Telephone Line Connection (1 of 4)
Symptom
Modem does
not go off-hook
and answer an
incoming call
Modem goes
off-hook,
answers, but
does not
connect
Action
CONNECTION PROBLEMS —
Dial Environments in Answer mode
Make sure the modem and PCMCIA socket are
configured for modem operation.
Make sure the telephone cord is connected to the
telephone line connector and the modem.
Make sure the telephone line connector is properly
connected to the modem.
Attach a standard telephone to the wall telephone outlet
and verify that it rings during incoming calls. Also verify
that outgoing calls can be made.
Verify that the Auto-Answer Ring Count configuration
option (S-Register S0) is set to a value other than 0
(disable).
Verify that the computer is providing DTR to the modem.
Set the modem's DTR Control to Ignore (&D0).
Verify that the originating modem supports your
modem's modulation schemes. The modem recognizes
CCITT V.32bis, V.32, V.22bis, V.22, Bell 212A, Bell 103J,
and V.23. Note that the modem does not support other
vendors' proprietary modulation schemes.
Determine the originating modem's modulation scheme,
and then force your modem to operate at the same
modulation scheme as the originating modem.
Try using different operating modes (\N). Start with \N4 and
attempt to answer a call. Try to answer a call after stepping
down to each \N setting (\N3, then \N2, etc.)
Perform a Local Analog Loopback test (&T1) and verify
that data entered at the computer is echoed back to the
computer.
Issue 1 November 1994
A-3
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