Intel MD566X Manual do Utilizador descarregar pdf (Página 96)

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 capabilities with internal

adaptive echo cancellers. This command takes the received voice signal and

loops it back to the analog transmit pins. The host must configure the relays 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+VLS=7.

After enabling the speakerphone mode (+VSP=1), the modem remains in voice

command mode and provides information about local off-hook detection, DTMF

detection, and tone detection — if supported by the modem board.

n = 0, 1

n = 0* Speakerphone mode disabled

n = 1 Speakerphone 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 emulation 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 support-

ed, then the factory default value is equal to “1”. If the digital speakerphone is not

supported, then the factory default is “0”.

n = 0, 1

n = 0 Telephone Emulation Mode speakerphone

n = 1* Digital 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)

1 2 ... 91 92 93 94 95 96 97 98 99 100 101 ... 129 130

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Intel MD566X Manual do Utilizador Página 96