Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 215)

AN93
Rev. 1.3 215
Table 134. Transmit/Receive 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+VLS=13 OK
Setup off-hook voice mode. See Table 115 on page 186
for details. This command will switch the modem to off-
hook state. The default value is +VSP=0 for disabled
speakerphone.
[Dial Number]