Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 204)

A N 9 3
204 Rev. 1.3
Table 129. TAM Handset Record 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+VGR=128 OK
Set the Si3000-to-RS232 receive gain
(UC0) for TAM Hands-Free.
AT:U0B1,0500 OK
Restore Si3000-to-DAA transmit gain path
to allow voice samples to reach FDV block
for silence detection. This allows the driver
to automatically end OGM recording.
AT+VSD = 129 OK
Set sensitivity level for OGM recording
silence detection.
AT+VSM = 4 OK
Select G.711U
-law PCM, 8-bit, 64 kbps
format. The voice driver will need to track
the OGM format with the OGM PCM file.
AT+VTS = [1000,0,100] OK Play user record tone prompt.
AT:U199|8 OK Mute speaker.
AT:U199&FFFD OK Enable microphone for OGM recording.