Research & Development
9. Voice AT Commands
Command
Function
Option
Default
Description
+FLO
Flow control select.
0,1,2
1
0: NO flow control.
1: (XON/XOFF) Software flow control.
2: (RTS/CTS) Hardware flow control.
+VIP Initialize
parameters.
N/A N/A
+VSD=15,70 (15*4, 7 second)
+VTD=100 (1 second)
+VRN=10 (10 second)
+VRA=70 (7 second)
+VGR=0 (Enable AGC)
+VGT=128
+FLO=1 (XON/XOFF)
+VIT=70 (7 second)
+FCLASS
Voice/data/fax selection 0,1,2.0,8
0
0: DATA.
1: CLASS 1 FAX.
2.0: CLASS 2.0 FAX.
8: VOICE.
+FMI Manufacturer
ID.
N/A Omni56K
+FMM? Model
ID
N/A
ZyXEL
+FMR? Revision
N/A
V1.x
+VRX
Voice recording
N/A
N/A
Start recording.
+VGR
Set the gain for the
received voice sample.
0
0
0: Automatic gain control(AGC)
+VGT
Set the gain for the
transmitted voice
sample.
0-255 128
+VLS
Select a voice I/O
device.
0,1,2
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
provided with power. The modem can
record/play through the local phone set.
2: The DCE is off-hook and is connected
to the Telco line. The local phone is
provided with power. The modem can
record/play though the telephone line.
+VRA
Ring back goes away
timer
0 – 255
70
0 : turn off timer
Unit: 100 ms
+VRN
Ring back never come
timer
0 – 255
10
0 : ring back never come
+VTX
Voice transmit mode
NA
NA
Enter voice transmission process.
+VSD Silence
detection
Threshold,
Period
(0-31),(0-255)
15,70
(0-31): DCE silence detection threshold
0: Disable silence detection.
(0-255): The required period of silence
detection before DCE reporting event.
0: Disable silence detection.
Unit: 0.1 second
+VSM Selection
compression
method
4;ZyXEL
ADPCM; 4
Bit;(9600)
4,9600
IMA 4 bit ADPCM.
Sample rate : 9600
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Revision 1.0
2003/6 From 3JTech
