26
COMPRESSION: CLASS 5 66 COMPRESSION: V.42BIS
67
COMPRESSION: NONE
69
PROTOCOL: NONE
70
PROTOCOL: LAPM
77
PROTOCOL: ALT
80
+FCERROR
+F4
Section Six - Troubleshooting
This section describes some of the common
problems you may encounter while using your
modem. If you can not resolve your difficulty after
reading this chapter, contact your dealer or vendor
for assistance.
Modem does not respond to commands.
1. Make sure the communication software is
configured to "talk" to the modem on the correct
COM port and IRQ setting (same COM port and
IRQ setting as the modem). Your communication
software must know which address your modem is
using in the system in order to pass data to it.
Similarly, IRQ settings must be set correctly to
receive data from the modem.
2. Make sure that your modem is initialized correctly.
Your modem may have been initialized to not
display responses. You may factory-reset the
modem by issuing AT&F and press ENTER. The
factory default allows the modem to display
responses after a command has been executed.
Modem does not dial.
1. Make sure the modem is connected to a working
phone line. Replace the modem with a working
phone to ensure that the phone line is working.
2. Make sure the phone line is connected to the jack
marked "LINE." Incorrect connection prevents the
modem from operating properly. Refer to Section
2.3 for modem connection instructions.
Modem dials but does not connect.
1. Make sure the IRQ setting is identical on both the
modem and the software. Modem and software
