Its (Integrated Telephone System) And Monitor Section; Atas (Automatic Telephone Answering System) Section - Panasonic KX-FT937LA-B Service Manual

6.8.

ITS (Integrated Telephone System) AND MONITOR SECTION

6.8.1. General
The general ITS operation is performed by the modem IC5. The alarm tone, the key tone, the calling tone and the beep are output
from the ASIC IC1 (digital board).
6.8.2. Handset Circuit
1. Function
This circuit controls the conversation over the handset, i.e. the transmitted and received voices to and from the handset.
2. Signal path
Refer to Signal Route (P.108)
6.8.3. Monitor Circuit for Each Signals
1. Function
This circuit monitors various tones, such as 1 DTMF tone, 2 Alarm/Beep/Key tone/Bell 3 Dummy ring back tone.
2. Signal path
Refer to Signal Route (P.108)
6.9.

ATAS (Automatic Telephone Answering System) SECTION

6.9.1. Remote Receiving
1. Function
This is the parallel connection DTMF signal for the TEL mode between a and b. When the other party is a FAX, the unit
changes to FAX receiving.
2. Signal Path
Refer to Signal Route (P.108)
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