SI2457-D-FS Silicon Laboratories Inc, SI2457-D-FS Datasheet - Page 206

• Manufacturer Part Number: SI2457-D-FS
• Description: IC ISOMODEM SYSTEM-SIDE 16SOIC
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2457-D-FS

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

AN93
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
206
Host to Modem Commands / Data
AT:U199&FFF7
AT+VGT=128
AT:U72,05B3
AT:U72,065C
AT:U72,075E
AT:U72,0900
AT:U72,0110
AT:U72,0900
AT:U199|A
Table 129. TAM Handset Record OGM (Continued)
Table 130. TAM Handset Review OGM
Rev. 1.3
Host Result
Codes/Data
Modem to
OK
OK
OK
OK
OK
OK
OK
OK
OK
Mute the microphone and speaker paths to
the codec.
Configure Si3000 Register 1:
Enable speaker driver
Disable line output driver
Disable telephone instrument driver
Enable MBIAS output
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
Configure Si3000 Register 6:
0 dB RX PGA gain
Disable Line Out
Disable telephone instrument output
Configure Si3000 Register 7:
0 dB RX PGA gain
Enable SPKRL
Mute SPKRR
Configure Si3000 Register 9:
0 dB Line Out attenuation
0 dB Speaker output attenuation
Set the RS232-to-Si3000 transmit gain
(UB8) for TAM Hands-Free.
Configure Si3000 Register 9:
0 dB Line Out attenuation
0 dB Speaker output attenuation
Enable speaker for local ring tone/alert
tones.
Local Modem Actions