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Troubleshooting
Table A-3 provides some solutions to problems that can occur
when your modem tries to answer a call.
Table A-3. Connection Problems while Answering a Call
Symptom
Modem does not go
off-hook and answer
an incoming call
Modem goes
off-hook, answers,
but does not
connect
A-4
Issue 2
Action
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. Your modem
recognizes CCITT V.34, 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 (except for
V.32terbo, which is supported).
Determine the line speed of the originating
modem, and then force your modem to operate at
the same rate. The %B command sets the
maximum speed.
Enable automatic rate negotiation with S-Register
S76=0. This allows the modem to connect at
lower rates when the line signal quality is poor.
Try using different operating modes (\N). Start with
\N7 and try to answer a call. Try to answer a call after
stepping down to each \N setting (\N6, then \N4,
etc.)
Perform a Local Analog Loopback test (&T1) and
verify that data entered at the computer is echoed
back to the computer.
May 1995
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