KX-TG6811UAB, KX-TG6811UAM, KX-TG6812UAB, KX-TG6821UAB, KX-TGA681RUB, KX-TGA681RUM - Panasonic Telephone Service Manual (repair manual). Page 11

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

• Voice Message Recording/Play back

The BBIC 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 BBIC implements synthesized Voice, utilizing the built in speech detector and a Flash Memory, which stored the vocabulary.

• Caller ID demodulation

The BBIC 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 
Telephone line, etc. They are determined by the signal path route operation of voice signal.

• Block Interface Circuit

RF part, LED, Key scan, Speaker, Telephone line.

Following information data is stored.

• Voice signal

ex: Pre-recorded Greeting message, Incoming message

Following information data is stored.

• Settings

ex: message numbers, ID code, Flash Time, Tone/Pulse

RF part

ADPCM

Analog
Front
End

&
  
Multi-
plexer

TEL
Line
Interface

Digital
Speech
Processor

Caller ID
Modem

Digital TAM  System

*1

Flash Memory  IC601

*1

 Host CPU

DECT RF system
 TDMA/TDD
 Mod/Demod
 PA/LNA

ADPCM

Keys/ LEDs/ Charge

*1

EEPROM IC611

*1 for KX-TG6821 only

Speaker

*1