ComStar SVD Owner’s Manual
32
Echo Troubleshooting
Each character you type appears twice or no characters
appear at all during data mode.
Make sure that your software is in full-duplex mode when you
make a call. If the remote modem is not also in full duplex mode,
change to terminal mode, type
AT E0
and press Enter. Then turn
on your communications software’s local echo. Your software
now echoes commands during terminal mode and any typing
performed during data mode.
Dial Troubleshooting
The modem does not automatically dial a call when you send
a Dial command.
Make sure the modem speaker is turned on in your software so
that you can hear dialing sounds. Also make sure that the phone
line is plugged in.
Make sure that your are dialing a valid phone number, including
any required dial prefixes.
If you are using tone dialing on a line that requires pulse dialing,
the line may not be able to accept tone-dialed calls. Select Pulse
dialing in your software or include the P command in place of T in
your Dial command line to specify pulse dialing.
Make sure software dialing prefix is ATDT (for tone dialing) or
ATDP (for pulse dialing).
Make sure your communications software and modem are
configured for the same COM port.
Make sure your modem has hung up from the previous call.
Select Hang Up in your software; or change to terminal mode,
wait one second, type
ATH
and press Enter to hang up the
modem.
