User`s guide

38
Command Option Function
+VSM= m,n,p,q Specifies the voice compression parameters
m options: Specifies the compression method
128 PCM
129 ADPCM
n options: Specifies the sampling rate to determine
whether to compress
8000 8000 Hz
P options: Parameter p specifies compression and
expansion of periods of silence. These
parameters are not implemented in Release 1.
0. You may leave them blank or enter the value
0.
0 Disable
q options: Parameter q specifies compression and
expansion of periods of silence. These
parameters are not implemented in Release 1.
0. You may leave them blank or enter the value
0.
0 Disable
+VTD DTMF Tone Duration
+VTD n Generate tone for n /100 seconds; n =0-255.
Default=100.
+VTS DTMF Tone Generation Properties
+VTS accepts multiple options, separated by
commas, of any of the following types. Use
square and curly brackets as shown.
D Generate default DTMF Tone, default duration
(f,n) t specifies a DTMF tone; t = 0-9
n specifies tone duration n /100 seconds;
n = 1-500
(f,g,n) f and g specify a tone pair, f Hz and g Hz; in
the range n Specifies tone-pair duration
n /100 seconds; n = 1-500
Examples: AT+VTS=4,{},[1000,1300,50],8.{*5},[,,100]5
This example specifies the following sequence:
1.Play DTMF 4 for the duration stored in + VTD
2.Play silence for the duration stored in +VTD
3.Play tone pair at 1000 Hz and 1300 Hz for 500
ms
4.Play DTMF 8 for a duration stored in +VTD
5.Play DTMF * for 50 ms
6.Play silence for 1 second
7.Play DTMF 5 for the duration stored in + VTD
+VTX Enter Voive-Transmission Mode
Notes: the speakerphone state does not have
to be reset after recording to the line or playing
a message to the line. The baud rate is not set
before the StartPlay and StartRecord
commands. The baud rate is not reset after the
StopPlay and StopRecord.