facsimile transmission signals.
(DTMF Monitor Tone)
Refer to CHECK SHEET().
4. Busy/Dial Tone Detection
The path is the same as FAX receiving. When it is detected, the
carrier detect bit of the resistor in the ASIC (IC604) becomes 1,
and this status is monitored by itself (IC604).
5. Call Tone Transmission
This is the call signal which is generated the ASIC (IC604) and
sent to the speaker.
7.3.5. ANALOG SECTION
7.3.5.1. ANALOG GATE ARRAY (IC201 on the Digital Board))
This IC can perform signal route switching and level adjustments for various types of analog
signals.
This IC incorporates a cross-point switch (CPS), an electronic volume.
The CPS of this IC is controlled by sending data from digital ASIC.
Explanation of ANALOG GATE ARRAY (IC201 on the DIGITAL Board)
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