ZyXEL Communications omni 56k ii, 56k plus ii User Manual

Omni 56K II and Omni 56K Plus II User’s Guide 

Command Sets 

 

 5-23 

2: The DCE is off-hook and is 
connected to the telephone line. 
Power is also provided to the local 
phone. The modem is able to 
record/play through the local 
telephone line. 

+VRA 

Ring back goes away 
timer 

0 - 255 

70 

0 : turns off the timer 
1-255: Defines the period without 
ringback (after at least one ringback 
has been detected) in 100 -ms units. 

+VRN Ring 

back 

never 

come timer 

0 - 255 

10 

0 : turns off the timer 
1-255: Defines the period without 
ringback after dialing in 1 sec units. 

+VTX 

Voice transmit mode 

N/A 

N/A 

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 reports 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) 

N/A 

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) 

N/A 

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 

N/A 

x: DTMF digits (0-9,*,#, A,B,C,D) 
Duration:+VTD setting. (in 10ms unit)