US Robotics COURIER - The Audio Monitor; Speaker Control (Mn)

COURIER HIGH SPEED MODEMS
THE AUDIO MONITOR
The modem's speaker enables you to monitor the dial-connect
process. There are several ways to make use of this feature.
After the Courier dials a number, it waits 60 seconds for a high-
pitched answer tone from the other modem, immediately fol-
lowed by data signals, called a carrier. These signals must occur
before a data link is established.
At the default Xl setting, if someone answers the phone, or if the
line is busy, the modem sends the message NO CARRIER to
your screen after 60 seconds. If you listen to the speaker, you
can respond immediately instead of waiting for the modem to
time out.
For example, if you hear someone answering the call, you can
pick up the phone, if it's attached to the modem, and talk to the
person. Or you can cancel the call by pressing any key on the
keyboard. In the same way, you can cancel a call when you hear
a busy signal.
You can also hear if dialing is proceeding too quickly for the
system. Terminate the call (press any key) and retype the Dial
command, but insert a comma(,) or a couple of slashes(/), to
have the modem pause during the dialing process.
SPEAKER CONTROL (Mn)
This command disables the speaker entirely or sets the speaker
to monitor different segments of the dial-connect sequence.
MO This setting disables the speaker entirely so that you don't
hear the modem go off hook, dial, etc.
Ml The speaker is ON until Carrier Detect. Default. You can
monitor call progress until the Courier detects the remote
modem's carrier signals, or until the 60-second timeout
and result code display. At Carrier Detect, the modem
disconnects the speaker and data transmission sounds are
suppressed.
M2 The speaker is ON continuously, including during data
transmission.
M3 The speaker doesn't go ON until after the last digit is
dialed, then goes OFF at Carrier Detect.
5-10 Internal Controls
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