User guide

AUDIO
COMMANDS
AT Commands for EV-DO-EV3 Modems
206
Syntax
Command Command type
AT#TTY=<support> Set
AT#TTY? Read
AT#TTY=? Test
Parameters and Values
<support>
0 Disable TTY function Default: 0.
1 Enable TTY function.
2 TTY and voice (VCO: voice carry over).
3 TTY and hear (HCO: hearing carry over).
Notes
 The value set by this command is directly stored in non-volatile memory and does not depend on the
specific AT instance.
DVI Microphone Gain #PCMTXG
Set command sets the DVI (PCM) Audio TX gain.
Read command returns the current PCM Audio TX, in the format:
#PCMTXG: <TX_VOL>
Test command reports the supported range of values for <TX_VOL>.
Syntax
Command Command type
AT#PCMTXG=<TX_VOL> Set
AT#PCMTXG? Read
AT#PCMTXG=? Test
Parameters and Values
<TX_VOL> PCM TX volume in TX path.
-5000(-50dB) – 1200(+12dB) A TX_VOL is 1/100 dB step.
-50dB is mute.
DVI Speaker Volume Level #PCMRXG
Set command sets the PCM Audio RX gain.
Read command returns the current PCM Audio TX, in the format:
#PCMRXG: <RX_VOL>
Test command reports the supported range of values for <RX_VOL>.