6. DATA COMMUNICATION
6-83
6.4.5 Troubleshooting
Problem Probable
cause
Action
1. No contact with
modem:
Wrong setup of
Communication Unit.
•
Check cable connection.
•
Disconnect USB cable, and
reconnect.
•
On PC, open Phone and Modem
options and check whether USB
Modem driver is connected to COM
port.
If not:
1. Remove Modem in Phone and
Modem options.
2. Remove previous USB installations
via Control Panel>System>
Hardware>Device Manager.
Double-click universal serial Bus
Controller and uninstall the USB
universal Host Controller.
Warning! Remove all USB drivers.
3. Start again from page 6-71.
2. Cannot find
Network
Connection
:
Network connection not
installed.
•
Contact your PC vendor to get the
software.
3. Connection
unsuccessful:
Other end is not an ISDN
connection.
•
It is not possible to use the USB port
if the modem on the receiver side is
not an ISDN modem.
Wrong connection details
•
Check the phone number, user name
and password with your service
provider.
•
Check whether the 64kbps data UDI
is commissioned
4. Cable length
Guranteed length: 1.5 m
•
Recommended maximum length: 3 m
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