Panasonic KX-MB2061CXB Service Manual page 29

6.3.3. Modem Circuit Operation
The modem (Included IC300) has all the hardware satisfying the CCITT standards mentioned previously.
ALL processing is controlled by the SOC (IC300) according to CCITT procedures.
This modem (Included IC300) has an automatic application equalizer. With training signal 1 or 2 at the time of G3 reception, it can
automatically establish the optimum equalizer.
Facsimile Transmission
The digital image data sent on ATXD line from modem (Included IC300) .
AFE IC(IC200) and Analog DAA
Facsimile Reception
The analog image data which is received from the telephone line passes through Analog DAA circuit and enters AFE IC(IC200).
The signals are changed to digital data in AFE IC and IC300. In this case, the image signals from the telephone line are trans-
mitted serially. Here, the internal equalizer circuit reduces the image signals to a long-distance receiving level. This is designed
to correct the characteristics of the frequency band centered around 3 kHz and maintain a constant receiving sensitivity.
Busy/Dial Tone Detection
The path is the same as Facsimile Reception.
Call Tone Transmission
This is the call signal which is generated the BBIC (IC902) and sent to the speaker.
1
* DAA : Direct Access Arrangement
*1
circuit to the telephone line.
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KX-MB2061CXB/KX-MB2061CX2/KX-MB2062CXB