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

AN93

Table 129. TAM Handset Record OGM

	Modem to
Host to Modem Commands / Data	Host Result	Local Modem Actions
	Codes/Data
AT:U199A	OK	Mute the microphone and speaker paths to
		the codec.
		Configure Si3000 Register 1:
		Enable speaker driver
AT:U72,0110	OK	Disable line output driver
		Disable telephone instrument driver
		Enable MBIAS output
		Configure Si3000 Register 5:
		10 dB Line In gain
		Mute Line In
AT:U72,05B3	OK	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
		Configure Si3000 Register 9:
AT:U72,0900	OK	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.
		Restore Si3000-to-DAA transmit gain path
AT:U0B1,0500	OK	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.
		Select G.711U μ-law PCM, 8-bit, 64 kbps
AT+VSM = 4	OK	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:U1998	OK	Mute speaker.
AT:U199&FFFD	OK	Enable microphone for OGM recording.

204 Rev. 1.3