3Com Courier, Reference

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17-6 C
HAPTER
17: T
ROUBLESHOOTING
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If your modem is attempting to answer a V.32 call, you may need t
lengthen the extra V.32 answer tones. See Appendix B, Alphabetic
Command Summary, under S28
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If you are attempting to make a connection using HST modulation,
make sure that the modem at the other end of the line is HST
compatible, V.32
terbo compatible at 14.4 Kbps, V.32 compatible at
9600 bps, V.22 bis compatible at 2400 bps, Bell 212A-compatible at
1200 bps, or Bell 103-compatible at 300 bps.
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If none of the above corrects the problem, it's likely that the quality of
the phone connection is poor. The variable quality of phone line
connections may be due to any number of conditions in the phone
service's equipment or the current environment. Try several calls, and
if you still can't get through, try calling another device. If the second
device accepts your call, the problem may lie with the device you first
tried to call.
Errors during software download
Try performing the XMODEM file transfer, at a slower serial port rate. If
your computer doesn't have a 16550 UART, set your communications
software to use a slower serial port.
If You Still Have Problems
The problems described above are by far the most common ones that
users encounter. If the suggestions we've given don't clear up your
difficulties, try the following:
1 Review the manual carefully to see if you've missed something.
2 Call or visit your dealer. Chances are that your dealer will be able to give
you the assistance you need
3 If your dealer can't help you, call the 3Com technical support line
4 If you must return your Courier V.Everything modem to 3Com, the
Service Representative you talk with will give you a User Service Order
(USO) number. Products without an USO number will not be accepted.
5 If you do return the Courier V.Everything modem to us, please follow
these procedures: