User's Manual

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ex2: AT+VTS=2 play DTMF 2 with a duration by the +VTD command
ex3: AT+VTS=[1000,1300,50] play tone pair 1000Hz and 1300hz with a
duration of 50ms
ex4: AT+VTS={*,6} play DTMF * with a duration of 60ms
ex5: AT+VTS=9 play DTMF 9 with a duration by the +VTD command
+VTX Enter voice playback mode
+VRX Enter voice record mode
+VSM=<cml>,<vsr>
cml=128 , select linear 8bit PCM
cml=132 , select IMA ADPCM
vsr =xx, Sample rate is always 8000
+VSM? Report current parameter
+VSM=? Queries the range that DCE support
+VPR=<rate> DTE/DCE rate will be equal 2400*rate , but auto-baud if rate=0
+VPR? Report current parameter
+VPR=? Queries the range that DCE support
+VLS=<pmode>
pmode=0: DCE on-hook, local phone connected to Telco.
pmode=1: DCE off-hook, DCE connected to Telco
pmode=2: DCE off-hook, local phone connected to DCE
pmode=3: DCE off-hook, local phone connected to Telco, DCE to
local phone
pmode=4: Speaker connected to DCE,DCE on-hook(playback
message)
pmode=5: Speaker connected to DEC, DCE off-hook(call screening)
pmode=6: Microphone connected to DCE, DCE on-hook(Record
greeting)
pmode=7: Microphone and speaker connected , DCE off-hook
(speakerphone)