Furuno Felcom 30 Operator's Manual page 130

6. DATA COMMUNICATION
Checking your configuration
Connection attempt fails quickly and reports a hardware error with the
modem
Check that no other application for example hyperterminal or vtLite is using the
serial port and check that the serial cable is properly connected between the PC
and the terminal.
The MPDS real time status display starts but the connection fails to establish
Start hyperterminal or another terminal emulator so AT commands can be
entered to the terminal.
First check the LES being used AT+WLES? The terminal will reply with the LES
access code being used. If this is not what you expect change the value with
AT+WLES=xxx and save the new value with AT&W now check that it is possible
to access the MPDS service by entering AT+WREG=1.
The real time status display should show "Allocating" "Tuning" and finally
"Registered"
If instead you see "Failed" "Inactive" then the terminal has not been able to
connect to the MPDS service with the given access code.
The result of the registration attempt is also shown to the AT interface.
If registration worked then deregister with AT+WREG=0.
The registration attempt succeeds but connection attempts fail
Check that the max speed of the modem that was setup is 115200bps.
6-42
before timing out.