Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 218)

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218 Rev. 1.3
Table 135. AEC Gain Calibration – Dial Remote Telephone
Host to Modem
Commands / Data
Modem to Host Result
Codes/Data
Local Modem Actions
ATZ OK Reset the modem.
AT+FCLASS=8 OK Enter voice mode.
AT:U199|4 OK Set SPCAL (U199 [2]) to enable calibration.
AT*Y254:W59|1 OK Enable the SSI interface to the Si3000.
AT:U72,0108 OK
Configure Si3000 Register 1:
Disable speaker driver
Enable line output driver
Disable telephone instrument driver
Disable MBIAS output
AT:U72,0597 OK
Configure Si3000 Register 5:
10 dB Line In gain
Enable Line In
20 dB MIC input gain
Mute MIC input
Mute telephone instrument input
Enable IIR filter
AT:U72,065E OK
Configure Si3000 Register 6:
0 dB RX PGA gain
Enable 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:UB1,xxxx OK
Use calibrated value from “Transmit Gain Calibration –
Speakerphone Disabled” section.
AT:UB5,xxxx OK
Use calibrated value from “Receive Gain Calibration –
Speakerphone Disabled” section.
AT+VLS=13 OK
Setup off-hook voice mode. See Table 122 on page 198
for details. This command will switch the modem to off-
hook state.
AT+VSP=1 OK
Enable speakerphone voice path. See Table 136 for
details.
[Dial Number]