11
KX-TG9331BXT/KX-TGA931BXT/KX-TGA930BXT
4.4.
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 func-
tions as follows.
4.4.1.
DSP (Digital Speech/Signal Processing: IC501)
•
Voice Message Recording/Play back
The DSP system uses a proprietary speech compression technique to record and store voice message in Flash Memory.
An error correction algorithm is used to enable playback of these messages from the Flash Memory.
•
DTMF Generator
When the DTMF data from the handset is received, the DTMF signal is output.
•
Synthesized Voice (Pre-recorded message)
The DSP implements synthesized Voice, utilizing the built in speech detector and a Flash Memory, which stored the vocabulary.
•
Caller ID demodulation
The DSP implements monitor and demodulate the FSK/DTMF signals that provide CID information from the Central Office.
•
Digital Switching
The voice signal from telephone line is transmitted to the handset or the voice signal from the handset is transmitted to the Tele-
phone line, etc. They are determined by the signal path route operation of voice signal.
•
Block Interface Circuit
RF part, LED, Key scan, Speaker, Microphone, Telephone line.
4.4.2.
Flash Memory (IC601)
Following information data is stored.
•
Voice signal
ex: Pre-recorded Greeting message, Incoming message
•
Settings
ex: message numbers, ID code, Flash Time, Tone/Pulse
Содержание KX-TG9331BXT
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Страница 101: ...101 KX TG9331BXT KX TGA931BXT KX TGA930BXT 15 3 Explanation of IC Terminals RF Part 15 3 1 IC701 ...
Страница 105: ...105 KX TG9331BXT KX TGA931BXT KX TGA930BXT 16 3 Cabinet and Electrical Parts Charger Unit ...
Страница 106: ...106 KX TG9331BXT KX TGA931BXT KX TGA930BXT 16 4 Accessories and Packing Materials 16 4 1 KX TG9331BXT ...
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