Chapter 3: Troubleshooting; General Troubleshooting - Zoom PCMCIA V.90 User Manual

Chapter 3:
This chapter covers three categories: general trouble-
shooting, dial troubleshooting, and online troubleshoot-
ing.
For help with this problem...
The modem does not respond to AT commands,
or stops working completely.
The modem does not auto-answer.
The modem goes off-hook and seizes the tele-
phone line.
No response appears after executing a com-
mand.
The speaker volume is too high or too low.
The modem does not automatically dial a call
when you send a dial command line.
The modem does not respond to dial commands
from your software.
The modem can connect to some modems, but
not to others.
Your online service reports a connect speed that
doesn't match your modem's speed.
You cannot hear the connection through the
speaker.
Your modem disconnects while communicating
with a remote system.
The modem does not make a data connection.
Data appears garbled on the screen.

General troubleshooting

First of all, be sure that your modem is plugged in with a
phone cord between the modem and a working telephone
jack. If you're not sure that the jack is working, plug a
telephone into it, go off-hook, and confirm that you have
a dial tone.

Chapter 3: Troubleshooting

Troubleshooting
See
page...
20
20
21
21
21
21
22
22
24
24
25
25
25
19