User guide

Maintenance & Troubleshooting 7 - 13
Modem Module
Table 7-9 Troubleshooting the Modem Module
Symptom Possible Cause Solution
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 MC909X
Integrator 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 MC909X, 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 (refer to the
MC909X Integrator Guide).
Host computer is not
selected in the
ActiveSync window on
the mobile computer.
Select a host computer in the ActiveSync window, and perform
setup (refer to the MC909X Integrator Guide).
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.