Panasonic KX-TES824LA Service Manual page 140

KX-TES824LA / KX-TEM824LA /
24.3. BLOCK DIAGRAM
Exp308
(2AP)
/Exp208
(3AP)
Card
EXP
CONNECTOR
CN701, CN702
24.4. EXPLANATION OF BLOCK DIAGRAM
24.4.1. Option Card (KX-TE82474X)
24.4.1.1. Cross Point Circuit
This is a space division switching system for connecting the following:
The eight extension circuits with the eight CO,DTMF generator, DTMF receiver, INT-CALL ID,MODEM,OGM, VB, paging, music on
hold, tone etc.
It is composed of 3 C-MOS IC´s. (8 x 16 matrix: 1pce 4 x 8 matrix:1pce, 8 x 8 matrix:1pce)
24.4.1.2. Intercom Circuit
This is the interface circuit of the single line telephone, and it is composed of 8 intercom circuit. (ICM17-24)
24.4.1.3. DTMF Receiver Circuit
The circuit which receives the Dial Tone Multi Frequency by which extension dispatch is carried out with the DTMF receiver
connected to the crossing point.
24.4.1.4. INT CALLID Circuit
FSK/Dial Tone Multi Frequency generated by DSP in ASIC are connected even to a crossing point through AMP.
The circuit which sends out a CALLID signal to the telephone connected to an extension by connecting the line of INT-CALL-ID with
arbitrary extensions.
Host i/f
Q1-4,TOE1,2,STD1,2
IC704, IC705
DTMFR (1,2)
(For EXT)
CO7-8
IC701, IC702, IC703
IC700
PIO
ASIC
CROSS
(I/O)HOOK17-24,BELL17-24
POINT
EXT17-24
140
EXT17
EXT18
EXT19
EXT20
EXT21
EXT22
EXT23
EXT24
KX-TE82474X BLOCK DIAGRAM