Troubleshooting - Acer HMU.0550.003 Benutzerhandbuch

descriptions. Since the communication software is designed to shield
the user from the difficult and cumbersome AT commands, we strongly
suggest that all modem operations be performed via the software.

Troubleshooting

If you encounter problems while using your modem, please read this
chapter. If you cannot resolve your difficulties after reading this
chapter, contact your dealer or vendor for assistance.
Problem
Modem does not
respond to
commands
Modem dials but
does not connect.
Modem makes a
connection but no
data appears on
your screen.
Solution
1
Make sure the communications software is
configured with the correct COM port and IRQ
setting (same COM port and IRQ setting as the
modem). Your communications software will not
be able to send or receive any data if it is not
configured to match the COM and IRQ settings for
the modem.
2
Make sure that your modem is initialized correctly.
Your modem may have been improperly initialized
by the software because you have selected an
incorrect modem type. You may also be prompted
to enter an initialization string by the software.
Use AT&F as your initialization string.
1
Make sure the IRQ setting is identical on both the
modem and the software.
2
Make sure the phone line is working properly. A
noisy line will prevent proper modem operation.
1
Make sure all communication parameters (baud
rate, data, stop, and parity bits) are properly
configured and are identical on both sides. Be
certain software flow control (Xon-Xoff - default)
is enabled in both the modem and the
communication software.
2
Press the ENTER key several times. The remote
system may be waiting to receive your data before
it begins.
3