3Com 3CCFEM556B User Guide - Page 66

Basic Modem Troubleshooting

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60 CHAPTER 9: DIAGNOSTICS AND TROUBLESHOOTING Basic Modem Troubleshooting Symptom COM Port Conflict (Modem on Com3 03E8, IRQ 3) Can't hear modem or speaker ERROR Message Modem doesn't dial correctly Modem not responding Solution s Indicates a conflict between two drivers claiming the same IRQs. Change one of the IRQs. s Make sure your computer's speaker is turned on (ATM1). s Turn your speaker volume on (ATL3). s Make sure you selected the correct COM port in your software. s If you are typing from the command line in terminal mode, retype the command. s Make sure you are issuing the correct command. s Make sure you have entered the telephone number correctly if you are using the dialing directory. s Make sure the number you dialed is correct if you are dialing it in terminal mode. s Be sure you placed a 1 before your number when dialing long distance. s If you are required to dial a prefix such as 9, make sure you dialed it first. s The other line could be busy or not answering. Make sure it is available to answer before calling. s If you are dialing internationally, your modem may not recognize the dial tone. Try the command ATX3DT and the telephone number. s Check your computer's BIOS setup. If it requires certain settings for modems, be sure they have been turned on. s Make sure you have selected the correct COM port in your software setup. s Make sure the modem has been connected completely. Check all your connections and make sure they are all secure. s Make sure the IRQ the modem is using is the same as the IRQ the communications software package is using relative to the COM port in question. s If you are running Windows, make sure that the IRQ the modem is using is the same as the IRQ as Windows.

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60
C
HAPTER
9: D
IAGNOSTICS
AND
T
ROUBLESHOOTING
Basic Modem Troubleshooting
Symptom
Solution
COM Port Conflict
(Modem on Com3 03E8,
IRQ 3)
■
Indicates a conflict between two drivers claiming
the same IRQs. Change one of the IRQs.
Can't hear modem or
speaker
■
Make sure your computer's speaker is turned on
(ATM1).
■
Turn your speaker volume on (ATL3).
ERROR Message
■
Make sure you selected the correct COM port in
your software.
■
If you are typing from the command line in
terminal mode, retype the command.
■
Make sure you are issuing the correct command.
Modem doesn't dial
correctly
■
Make sure you have entered the telephone
number correctly if you are using the dialing
directory.
■
Make sure the number you dialed is correct if you
are dialing it in terminal mode.
■
Be sure you placed a 1 before your number when
dialing long distance.
■
If you are required to dial a prefix such as 9, make
sure you dialed it first.
■
The other line could be busy or not answering.
Make sure it is available to answer before calling.
■
If you are dialing internationally, your modem may
not recognize the dial tone. Try the command
ATX3DT and the telephone number.
Modem not responding
■
Check your computer's BIOS setup. If it requires
certain settings for modems, be sure they have
been turned on.
■
Make sure you have selected the correct COM
port in your software setup.
■
Make sure the modem has been connected
completely. Check all your connections and make
sure they are all secure.
■
Make sure the IRQ the modem is using is the same
as the IRQ the communications software package
is using relative to the COM port in question.
■
If you are running Windows, make sure that the
IRQ the modem is using is the same as the IRQ as
Windows.