Longshine LCS-8156C1 - Manual (Page 102)

AT Commands for CX930xx Modem Reference Manual
3-78 Conexant 102752B
3.2.8 Diagnostic Commands
%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.
DTMF Tones
%TT0x DTMF Tones
Command syntax:
%TT0x
x = “digit to dial”: 1,2,3,4,5,6,7,8,9,0,*,#,A,B,C,D
FSK, V.22 and V.22 bis Spectrum
%TT1x V.21,V.23,V.22,V.22bis
%TT10 - V.21 channel 1 mark [originate] symbol
Command syntax:
%TT10
%TT11 - V.21 channel 2 mark symbol
Command syntax:
%TT11
%TT12 - V.23 backward channel mark symbol
Command syntax:
%TT12
%TT13 - V.23 forward channel mark symbol
Command syntax:
%TT13