56K V.92 Data, Fax, and Voice Chipset
96 Intel Confidential Programmer’s Guide
+VSP=n 0
Speakerphone On/Off Control: This command turns on the speakerphone
function. This feature provides full-duplex speakerphone c apabilities with internal
adaptive echo cancellers. This command takes the recei ved voice signal and
loops it back to the analog transmit pins. The host must configure the relay s and
microphone interface as necessary using the AT+VLS=n command. Typically,
this means setting the off-hook relay driver, speaker, and microphone inputs with
AT+V LS=7.
After enabling the speakerphone mode (+VSP=1), the modem remains in voice
command mode and provides information about loca l off-hook detection, DTMF
detection, and tone detection — if supported by the modem board .
n = 0, 1
n = 0* Spe akerphone mode disabled
n = 1 Spe akerphone mode enabled
#VSPS=n 1
Speakerphone Type Selection: This command determines which speaker-
phone type is used when the modem receives a +VSP=n command. This allows
the application software to select whether telephone emulati on or digital speak-
erphone is used for +VSP=n. Upon powering-up, the modem determines wheth-
er it can support a digital speakerphone mode. If digital speakerphone is suppor t-
ed, then the factory default value is equal to “1”. If the digital speakerphone is no t
supported, then the factory default is “0”.
n = 0, 1
n = 0 Telep hone Emulation Mode speakerphone
n = 1* Digi tal speakerphone
+VTD=n 100
Beep Tone Duration Timer: This command sets the default duration of all DTMF
tones.
n = 5–255 (units of 0.01 seconds)
Default: n = 100
n = 100* Default value (1 second)
Table 6-1. Voice Mode Command Descriptions (Continued)