Circuit Operation (Base Unit); Dsp (Digital Speech/Signal Processing: Ic501) - Panasonic KX-TG2338BXS Service Manual

KX-TG2338BXS / KX-TGA236BXS

17 CIRCUIT OPERATION (Base Unit)

General Description:
(DSP, Flash Memory) is a digital speech/signal processing system that implements all the functions of speech compression,
record and playback, and memory management required in a digital telephone answering machine.
The DSP system is fully controlled by a host processor DSP. The host processor provides activation and control of all that
functions as follows.

17.1. DSP (Digital Speech/Signal Processing: IC501)

17.1.1. Function
• • • • Caller ID and Call Waiting CID demodulation
The DSP implements monitor and demodulate the FSK signals that provide CID information from the Central Office.
• • • • Analog Switching
The voice signal from Handset is transmitted to the speaker or the voice signal from Digital TAM System is transmitted to the
Telephone line, etc. They are determined by the signal path route operation of voice signal.
• • • • Block Interface Circuit
RF unit, LED, Key scan, Speaker, Microphone, Telephone line, LCD.
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