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User's Guide for ZyXEL Omni 56K and Omni 56K Plus Modems
5-16
+VRA Ring back
goes away
timer
0 – 255 70 0 : turn off the timer
1-255: Defines the period without ringback
(after at lease one ringback has been
detected) in 100 -ms units.
+VRN Ring back
never come
timer
0 – 255 10 0 : turn off the timer
1-255: Defines the period without ringback
after dialing in 1 sec unit.
+VTX Voice transmit
mode
NA NA Switches to voice transmit mode.
+VSD Silence
detection
Threshold,
Period
(0-255), (0-255)
15,70 Threshold:
0: Disable silence detection.
1-255: The smaller the value, the more
sensitive to the silence detection it will be.
Period:
1-255: The required period of silence
detection before DCE reporting the silence
event.
0: Disable silence detection.
Unit: 0.1 second
+VSM Selection of
compression
method
4;ZyXEL
ADPCM; 4
Bit;(9600)
4,9600 IMA 4 bit ADPCM.
Sample rate : 9600
+VTS=
[x,y,z]
Dual Tone
Generation
x: 0-3000 Hz
y: 0-3000 Hz
z: 0- 1000(10ms)
NA x: first tone frequency
y: second tone frequency
z: duration in 10ms unit
+VTS=
{x,y}
DTMF Tone
Generation
x:0-9,*,#, A-D
y:0-1000 (10ms)
NA x: DTMF digits (0-9,*,#, A,B,C,D)
y: duration in 10ms unit
+VTS=
x,x…
DTMF Tone
Generation
x:0-9,*,#, A-D NA x: DTMF digits (0-9,*,#, A,B,C,D)
Duration:+VTD setting. (in 10ms unit)
+VTD Set default
duration of
DTMF tone.
1-255 100 Unit: 0.01 second.
+VIT Inactivity timer. 0-255 70 Unit: 0.1 second.
Table 19. Voice AT Commands
Voice Shielded DTE Commands
Command Description
<DLE>p Pause, suspend voice data to the output device in playback state.
<DLE>r Resume , resume suspended voice data in playback state.
<DLE><ETX> Terminate voice playback state, switch to online voice command
mode after completing remaining data in buffer.