ZyXEL omni.net Plus User Guide - Page 45

Omni 56K Plus Series User's Guide Table 4-12 Voice AT Commands COMMAND FUNCTION OPTION DEFAULT DESCRIPTION +VGR Set the gain 0 for the received voice sample. 0 0: Automatic gain control(AGC) +VGT Set the gain for the transmitted voice sample. 0-255 128 0: Silence 1-255: The larger the value, the louder the voice will be. +VLS Select a voice 0,1, 2 I/O device. 0 0: The DCE is on hook. Local phone connected to Telco line. 1: The DCE is on-hook and is connected to the local phone. The local phone is also provided with power. The modem can record/play through the local phone set. 2: The DCE is off-hook and is connected to the Telephone line. The local phone is provided with power. The modem can record/play through the local telephone line. +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 NA mode 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; 4,9600 4 Bit;(9600) IMA 4 bit ADPCM. Sample rate: 9600 +VTS= Dual Tone x: 0-3000 Hz NA [x,y,z] Generation y: 0-3000 Hz x: first tone frequency y: second tone frequency z: 0- 1000(10ms) z: duration in 10ms unit +VTS= {x,y} DTMF Tone x:0-9,*,#, A-D NA Generation y:0-1000 (10ms) x: DTMF digits (0-9,*,#, A,B,C,D) y: duration in 10ms unit Command Sets 4-17