Multitech MT5634HD16 User Manual page 29

Cn Carrier Control
n = 1
Default: C1
The Cn command provides backward compatibility with some data communications software.
C1 enables normal transmit carrier switching.
-Cn Data Calling Tone
n = 0 or 1
Default: -C0
The data calling tone is a tone of a certain frequency and cadence, as specified in the V.25 standards, which
identifies whether it is remote data, fax, or voice. The frequency is 1300 Hz, with a cadence of .5 s on and
2 s off.
-C0 disables the V.25 data calling tone.
-C1 enables the V.25 data calling tone.
F Echo Online Data Characters
n = 1
Default: F1
This command determines if the modem echoes data from the DTE. This command provides backward
compatibility with some data communications software.
F1 disables online data character echo.
&Gn Guard Tones
n = 0, 1, or 2
Default: &G0 (models outside U.K.) or &G2 (U.K. models only)
The &G command is used to control the presence or absence of guard tones from the transmitter when in
answer mode at either 1200 or 2400 bps. Guard tones are used in Europe and other areas to allow the
modem to function in the telephone systems. Guard tones are not used in the United States. U.K. models
are locked at &G2 (1800 Hz guard tone).
&G0 disables ITU-T guard tones.
&G1 enables ITU-T 550 Hz guard tone.
&G2 enables ITU-T 1800 Hz guard tone.
CommPlete Communications Server
3 AT Commands
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