3Com ACCESSBUILDER 7000 User Manual - Troubleshooting Guide
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Troubleshooting Guide
In this section we discuss the basic problems that can occur when using
your modem. If you are having data communication difficulties such as
periodic character loss, random errors, or constant format errors: use the
loopback tests described in
AccessBuilder 7000 AT Command Reference
.
With these tests you can usually isolate the fault in your system by using
a process of elimination. If a problem continues to occur, contact your
supplier for assistance
.
M
odem Health
POWER LED does not light
Make sure that the front and rear cards are pushed fully home, and that
the rack enclosure is powered ON.
A problem is suspected after the power-up self-test
Initiate a local analogue loopback with a pattern test. If the modem
consistently registers errors, contact your modem supplier.
If the modem passes these tests and you still have a problem, it is
probably not with your modem.