6. DATA COMMUNICATION
6-19
6.1.8 Troubleshooting
Problem Probable
cause
Action
1. No contact with modem or
busy
Wrong setup of
Communication Unit.
vtLite Mobile uses the
same port.
•
Make sure the vtLite
settings are correct,
see
RS-232 configuration.
•
Try autodect if problems
with the connection.
•
Try different speed and
COM port settings.
•
Close vtLite Mobile.
2. Cannot find Dial Up
Networking:
Dial up connection not
installed.
•
Contact your PC vendor to
get the software.
3. Connection unsuccessful:
Wrong connection
details.
•
Check the phone number,
user name and password
with your service provider.
•
Using vtLite Mobile, check
configuration in Device
Manager.
4. Length of serial cable
Length of USB cable
Guaranteed length: 3 m
Guaranteed length: 5 m
5. All dialups dial in MPDS
•
Use AT+WS45=1 to set port
back to normal mode
.
6. User name and password
illegal
Some PCs always
require
username/password.
•
Enter any name/password
to ensure a successful call.
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