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10.4. Ports for Transmitting and Receiving of Data
11. BLOCK DIAGRAM (Base Unit)
12. CIRCUIT OPERATION (Base Unit)
General Description:
(DSP, Flash Memory) is a digital speakerphone/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.
12.1. DSP (Digital Speech/Signal Processing: IC201)
- Voice Message Recording/Play back
The DSP system use 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 Detection/Generator
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