62
iM1000-Data Modem
TROUBLESHOOTING
If you have a problem while setting up and using your modem for data calls,
read the symptoms and troubleshooting tips provided in the following table.
If the system responds with an error message, refer to “Error Messages” on
page 64.
Note that the response time for a wireless data call is slower than that for a
wireline (normal) data call.
Table 3: Identifying Symptoms
Symptom
Troubleshooting Tips
Your modem does not
respond to AT
commands.
Make sure that:
• The modem is powered on.
• The cable is properly connected to the
modem.
• The cable is connected to the correct
port and that this is the same port
specified for use in your communication
software.
• The modem is set to the same baud rate
as that specified in your communication
software.
Computer screen
appears distorted.
Turn off Auto Baud by activating AT+IPR
command. Make sure that the baud rate
setting in your software matches the baud
rate setting on the modem.
No characters are
displayed on the
computer screen.
Turn on Local Echo by activating the ATE1
command. See
“
Configuring
Communications Software
”
on page 60.
The 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 an
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.
The
NO
CARRIER
message display 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 any number
between 1 and 255.
