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iR1200 Modem
92 nextel.com
Symptom Troubleshooting Tips
modem.
• The cable is connected to the correct
port.
• The correct port is specified in your
communication software.
• The modem is set to the same baud
rate specified in the communication
software.
The NO CARRIER
message displays
when the modem
attempts data calls.
Make sure that the S7 register contains a
value greater than or equal to 60 by issuing
an AT&V command or by explicitly
setting ATS7=’x’ (where x is, enter any
number between 1 and 255).
Modem does not auto-
answer incoming data
calls (not default
operation).
Make sure that the S0 register contains a
value other than 0 (zero) by issuing the
AT&V command. You can also explicitly
set ATS0=x from the software’s command
mode (where x is any number between 1
and 255).
Received data is
unrecognizable.
Make sure that the flow control is set to
RTS/CTS (hardware flow control is
enabled) in the communication software
and is set to &K3.
Data is being
intermittently lost.
Make sure that the flow control is set to
RTS/CTS (hardware flow control is
enabled) in the communication software
and is set to &K3.
Modem seems to
respond slower than
usual.
Check the signal strength icon to be sure
the signal is not weak.