Chapter 10 - Voice Mode Operation
10-14
<method>
Flow Control Method
0
XON/XOFF and RTS/CTS flow control turned off
1
Use software XON/XOFF flow control in either direction.
2
Use hardware RTS/CTS flow control.
The DCE returns the OK result code if the DCE accepts the command. The DCE
returns the ERROR result code if the <method> subparameter is out of range.
AT+FLO?
The DCE returns the current flow control setting, followed by the OK result code.
AT+FLO=?
The DCE returns permitted flow control methods. The response is:
0,1,2
OK
Voice Mode Action Commands
AT+VIP
The DCE will initialize all voice parameters to the default settings as follows:
Parameter
Related Commands
Default Value
Silence threshold
+VSD
15
Hang-up code
+VNH
0
Compression method
+VSM
2 (2-bit ADPCM)
Beep tone interval
+VTD
50 (unit: 10 ms)
Inactivity timer
+VIT
70 (unit: 0.1 s)
Silence interval
+VSD
70 (unit: 0.1 s)
Ringback timer
+VRA
70 (unit: 0.1 s)
Ringback timer
+VRN
10 (unit: 1 s)
Reception Gain
+VGR
0
Transmission Gain
+VGT
128
Resync timer
+VSY
0 (disabled)
DTMF detection
intervaland threshold
+VDD
8 (unit: 5 ms) 5
Flow control method
+FLO
1 (software)
The DCE returns the OK result code if DCE accepts this command or returns the
ERROR result code if the DCE is not connected
AT+VRX
The DCE starts the voice reception process by first returning the CONNECT
result code to the DTE. After this is reported, the DCE sends <DLE> shielded
voice data to the DTE. There are three ways to leave the Voice State:
1. The DTE sends a character other than <XON>, <XOFF> or a shielded code.
