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CONNECT 0300/REL 16 CONNECT 1200/REL 17
CONNECT 2400/REL 18 CONNECT 4800/REL 19
CONNECT 9600/REL 20 CONNECT 19200/REL 21
CONNECT 38400/REL 26 CONNECT 57600/REL 27
NEGOTIATION PROGRESS CODES
CARRIER 300 40 CARRIER 1200/75 44
CARRIER 75/1200 45 CARRIER 1200 46
CARRIER 2400 47 CARRIER 4800 48
CARRIER 7200 49 CARRIER 9600 50
CARRIER 12000 51 CARRIER 14400 52
COMPRESSION: CLASS 5 66
COMPRESSION: V.42BIS 67
COMPRESSION: NONE 69
PROTOCOL: NONE 70
PROTOCOL: LAP-M 77
PROTOCOL: ALT 80
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.
3. Make sure the baud rate setting in your software is set to
57600, 38400, 19200, 14400, 9600, 2400, 1200, or 300 bps.
An incorrect baud rate prevents the modem from operating
properly.
4. Make sure that the modem is not conflicting with another
COM port or IRQ in a non-PnP system.
Modem does not dial.