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Chapter 3: Solving Common Problems 17
Solution: Your modem has a small speaker on its board
that gives you audible feedback of dial tones
and remote connection signals (“handshaking”).
This is not the same as the speaker that you
may have connected to your computer’s sound-
card.
If the software allows you to control the volume
of the on-board speaker, make sure the speaker
is enabled and set to a comfortable volume.
If the software does not have speaker settings,
add one of the AT commands listed below to
the initialization string:
L1 for low volume
L2 for medium volume
L3 for highest volume
M0 to turn the speaker off completely
M1 to turn the speaker back on
For example, if you want the volume low and
the software uses the initialization string AT
&F, change it to AT &F L1.
Dial Troubleshooting
Problem: The modem does not automatically dial a
call when you send a Dial command.
Solution: 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 you are dialing a valid phone
number, including any required dial prefixes.
If you are using tone dialing on a line that re-
quires pulse dialing, the line may not be able to
accept tone-dialed calls. Select Pulse dialing in
your software or make sure software dialing
prefix is ATDP (for pulse dialing).
Make sure your communications software and
modem are configured for the same COM port.