Silicon Laboratories SI2493/57/34/15/04, SI2494/39 manual TAM Handset Review OGM

AN93

Table 129. TAM Handset Record OGM (Continued)

		Configure Si3000 Register 9:
AT:U72,0900	OK	0 dB Line Out attenuation
		0 dB Speaker output attenuation
AT:U199&FFF7	OK	Enable speaker for local ring tone/alert
		tones.

7.6.3.2. Review OGM

The host will prompt the user to lift the handset to begin OGM review. The procedure restores the TAM Hands-Free settings before completion. The host will need to ensure the Handset Lowered Event is received before

Table 130. TAM Handset Review OGM

Host to Modem Commands / Data	Modem to	Local Modem Actions
	Host Result
	Codes/Data
AT:U199A	OK	Mute the microphone and speaker paths to
		the codec.
		Configure Si3000 Register 1:
AT:U72,0110	OK	Enable speaker driver
		Disable line output driver
		Disable telephone instrument driver
		Enable MBIAS output
		Configure Si3000 Register 5:
		10 dB Line In gain
AT:U72,05B3	OK	Mute Line In
		20 dB MIC input gain
		Enable MIC input
		Mute telephone instrument input
		Enable IIR filter
		Configure Si3000 Register 6:
AT:U72,065C	OK	0 dB RX PGA gain
		Disable Line Out
		Disable telephone instrument output
		Configure Si3000 Register 7:
AT:U72,075E	OK	0 dB RX PGA gain
		Enable SPKRL
		Mute SPKRR
AT:U72,0900	OK	Configure Si3000 Register 9:
		0 dB Line Out attenuation
		0 dB Speaker output attenuation
AT+VGT=128	OK	Set the RS232-to-Si3000 transmit gain
		(UB8) for TAM Hands-Free.

206 Rev. 1.3