Comtrol AT Commands - Manual (Page 118)

AT Commands for CX81801/CX06833/CX81300/CX06827 Modems Reference Manual
Conexant 102184B
3-92
%TT - PTT Test Command
This command facilitates PTT testing of signal levels by providing continuous signals
regards of whether or not the modem is connected to the line. The signal transmitted is in
accordance with the parameter provided.
A range of commands allows the user to initiate a series of signals required to obtain PTT
approval. The signals emitted include answer tone, modulation, carriers, and other
pertinent signals. A test is initiated upon receipt of a %TTn (the second T is a password
and n is a test number), and the test is aborted when any keyboard character is entered.
The modem will continuously transmit the tone or carrier according to the parameter
supplied.
Syntax
%TT0x x corresponds to the desired DTMF dial digit:
0 Dial digit 0
1 Dial digit 1
2 Dial digit 2
3 Dial digit 3
4 Dial digit 4
5 Dial digit 5
6 Dial digit 6
7 Dial digit 7
8 Dial digit 8
9 Dial digit 9
A Dial digit *
B Dial digit #
C Dial digit A
D Dial digit B
E Dial digit C
F Dial digit D
%TT3x x corresponds to the selected MISC function:
0 Silence
1 2100
Hz
2 1300 Hz
3 1100 Hz
4 2225 Hz
5-F Reserved