Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 206)

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206 Rev. 1.3
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
AT:U72,0900 OK
Configure Si3000 Register 9:
0 dB Line Out attenuation
0 dB Speaker output attenuation
AT:U199&FFF7 OK
Enable speaker for local ring tone/alert
tones.
Table 130. TAM Handset Review OGM
Host to Modem Commands / Data Modem to
Host Result
Codes/Data
Local Modem Actions
AT:U199|A OK
Mute the microphone and speaker paths to
the codec.
AT:U72,0110 OK
Configure Si3000 Register 1:
Enable speaker driver
Disable line output driver
Disable telephone instrument driver
Enable MBIAS output
AT:U72,05B3 OK
Configure Si3000 Register 5:
10 dB Line In gain
Mute Line In
20 dB MIC input gain
Enable MIC input
Mute telephone instrument input
Enable IIR filter
AT:U72,065C OK
Configure Si3000 Register 6:
0 dB RX PGA gain
Disable Line Out
Disable telephone instrument output
AT:U72,075E OK
Configure Si3000 Register 7:
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.
Table 129. TAM Handset Record OGM (Continued)