10 - 12 MC909X Integrator Guide
Modem Module
Table 10-10
Troubleshooting the Modem Module
Symptom Possible Cause Action
Mobile
computer is not
communicating
through the
modem.
The modem cable is not
fully connected.
Connect the modem cable securely to both the modem and the
telephone jack.
Modem is not securely
connected to the mobile
computer.
Reconnect the modem firmly to the mobile computer.
Communication software
is not installed or
configured properly.
Set up the communication software as described in the mobile
computer’s Product Reference Guide.
Problem in the telephone
lines.
Connect a conventional telephone and dial the remote modem to
verify the telephone lines are functioning. If the remote modem does
not answer the call and emit answering tones, contact the remote
System Administrator.
Mobile computer’s battery
is low or discharged,
which shuts off power to
the modem.
Install a charged battery in the mobile computer, or use an external
DC power adapter to recharge the battery.
ActiveSync
fails.
A partnership was not
established with the host
computer.
Establish a partnership with the host computer (see
Chapter 2,
Accessories
).
Host computer is not
selected in the ActiveSync
window on the mobile
computer.
Select a host computer in the ActiveSync window, and perform
setup (see
Chapter 2, Accessories
).
Modem RAS connection
not allowed by host
computer.
Select RAS connection in the host computer (File - Connection
Settings window). Refer to the ReadMe files located in the Microsoft
ActiveSync folder on the host computer.
Mobile computer or
modem was disconnected
from the telephone line
while ActiveSync was in
progress.
Disconnect the modem cable for 30 seconds to hang up the local
telephone connection. Close any open windows on the mobile
computer and any modem connections.
Synchronization occurred,
but the session is
configured to close
immediately after
synchronization is
complete.
Verify the setting of the When manually synchronizing disconnect
when complete checkbox by tapping Start - ActiveSync - Tools -
Options - Schedule tab.
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