Table of Contents
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1.
Out Line of IT-M704/M804.................................................................................................... 3
Feature.......................................................................................................................... 3
1-1.
1-2.
Feature List................................................................................................................... 4
1-3.
External appearance & LCD Layout........................................................................... 7
1-4.
LCD Specifications....................................................................................................... 9
1-5.
System Organization.................................................................................................... 9
2.
Specification ........................................................................................................................... 11
3.
BlockDiagram......................................................................................................................... 14
4.
Maincomponent (Semiconductor) ........................................................................................ 14
5.
Board Structure ...................................................................................................................... 15
6.
Explanation of the Circuit....................................................................................................... 16
6-1.
Main CPU ..................................................................................................................... 16
6-2.
I/F for telephone line..................................................................................................... 26
6-3.
Speech Net Work (N/W).............................................................................................. 30
6-4.
Speaker Phone ............................................................................................................ 31
6-5.
Control Data Transmission Circuit .............................................................................. 32
6-6.
Extension Call Circuit ................................................................................................... 33
6-7.
Caller-ID Circuit............................................................................................................. 36
7.
Regulation............................................................................................................................... 39
Block diagram........................................................................................................ 40
CONTENTS
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Table of Contents
