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AT Cmd
Function
Mode
Value
Setting
V23C
V.23
V32
V.32
V32B
V.32bis
V34
V.34
VPCM
56K
B103
Bell 103
Automode
DFV
0
Disabled
1
Enabled
Min Rate (Tx)
DFV
0
Minimum defined by Carrier
x
x = rate (default is 300)
Max Rate (Tx)
DFV
0
Maximum defined by Carrier
x
x = rate (default is 33600)
Min Rx Rate
DFV
0
Minimum defined by Carrier
x
x = rate (default is 300)
Max Rx Rate
DFV
0
Maximum defined by Carrier
+MS
x
x = rate (default is 60000)
+MR
Modulation Reporting Control
DFV
0
Disable
1
Enable
+VCID
Caller Identification Enable
DFV
0
Disable
1
Enable
+VDR
Distinctive Ring Enable
DFV
0
Disable
1
Enable
Distinctive Ring Report
DFV
0
No RING displayed
1 - 255
RING displayed after delay (10ms units)
+VEM
Event Reporting Control
V
Bit-Mapped
32 bit event mask. Bit positions described in table D
+VGR
Receive Gain Selection
V
128
+VGT
Transmit Volume Selection
V
128
+VIP
Initialize Voice to Default
V
-
-
+VLS
Analog Source Selection
V
0
DCE on-hook
1
DCE off-hook, DCE connected to Telco
8
DCE on-hook, DCE connected to Speaker
9
DCE off-hook, DCE connected to Telco and Speaker
11
DCE on-hook DCE connected to Microphone
13
DCE off-hook, DCE connected to Telco, Speaker, and
Microphone
+VNH
Automatic Hang-Up Control
DFV
0
Retain Automatic Hang-Up
1
Disable DCE Initiated Automatic Hang-Ups
2
Disable all Automatic Hang-Ups
+VPR
Voice DTE-DCE Rate
V
0
Autobaud
+VRA
Ringback Goes Away
V
0 - 255
0.1 second increments (default of 50)
+VRN
Ringback Never Appeared
V
0 - 255
0.1 second increments (default of 10)
+VRX
Enter Voice Receive Mode
V
0
Periodic tones while recording
1
Periodic tones while recording
+VSD
Silence Detection: Level
V
0
use +VSM value. If 0, use 128
128
medium
Silence Detection: Duration
V
0
Disable
1 - 255
0.1 second increments (default of 50)
+VSM
Voice Comp: Method
V
128
PCM
129
ADPCM
Voice Comp: Sample Rate
V
8000
8000Hz
Voice Comp: Silence Level
V
0
Disable
Voice Comp: Silence Exp
V
0
Disable
+VTD
Beep Tone Duration
V
0 - 255
0.01 second increments (default of 100)