Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 210)

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210 Rev. 1.3
7.6.4.2. Interrupted Answer – OGM Playback with DTMF Menu Entry
The procedure listed in Table 132 uses a remote-access password of 1234. DTMF decoding is asynchronous. The
host voice driver will need to employ a timer or timestamp to validate the consecutive DTMF digits that comprise
the remote password.
AT:U0B5,0 OK
Disable DAA-to-Si3000 receive gain path.
This ensures line events such as CID and
ring tone are not heard via the codec.
AT:U199|2 OK Mute the microphone.
AT:U199&FFF7 OK
Enable speaker for local ring tone/alert
tones.
AT+VLS=0 OK
Disable voice mode. Used as a transition
point between non-zero +VLS voice
modes. This will hang-up the call.
AT+VLS=14 OK
Setup on-hook TAM voice mode. See
Table 117 on page 190 for details.
Table 132. TAM PSTN Interrupted Answer – OGM Playback with DTMF Menu Entry
Host to Modem Commands / Data
Modem to Host Result
Codes/Data
Local Modem Actions
<DLE><R> Ring Detection
AT+VTS=[700,500,80] OK Play local ring tone.
<DLE><X>
CIDM
DATE=0101
TIME=0110
NMBR=102
NAME=JONES JENNIFER
<DLE><.>
Receive Type I CID DLE complex report.
<DLE><R> Ring Detection.
AT+VTS=[700,500,80] OK Play local ring tone.
<DLE><R>
Ring Detection. The voice driver will use a
rings-to-answer count. This example uses
three rings before answer.
AT+VTS=[700,500,80] OK Play local ring tone.
AT:U199|8 OK
Mute the speaker so the OGM is not heard
locally. The user may remove this com-
mand to allow local review.
AT+VGR=128 OK
Set the DAA-to-RS232 receive gain regis-
ter (UBF) for TAM PSTN.
Table 131. TAM PSTN Normal Answer – OGM Playback with ICM Record (Continued)