KX-HT82480, KX-HT82470, KX-HT82460 - Panasonic PBX Service Manual (repair manual). Page 10

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In this chapter we'll describe the block diagram of KX-HTS824/32 system.
There are many functional block in this system and each block function is described in table.1.

PBX Unit

HTS824 is costructed by the PBX unit that provides the functionality of a PBX, and the AC/DC unit that 
generates a power supply inside the device.
And the PBX unit is constructed by Main unit and Line Circuit unit. the Main unit is responsible for PBX 
functions, monitoring and control, on the other hand, Line Circuit unit is constructed by analog exten-
sion, analog trunk functions. 4 channel analog trunk line and 8 channel analog extension line circuits are 
implemented  by default, in addion to LCOT4 + SLC8, optional card such as LCOT4 / SLC8 / DPH2 can 
be implemented on option slot.

AC/DC Unit

The AC/DC unit will generate DC power inside from AC100-240V external power line. In addtion to AC 
power input method, HTS824 can operates by DC12V backup battery to avoid unexpected power out-
age.

Main Unit

The Main unit is constructed by dedicated CPU that is responsible for PBX function, monitoring and 
control. Furthermore, this CPU includes Gigabit Ether L2SW, DSP function which provide transcoding 
function between TDM and VoIP, and Wireless LAN (IEEE802.11b/g/n) interface function.

LCOT4

4 ports Analogue Trunk interface with Caller ID.

SLC8

8 ports Standard Telephone Line Interface with Caller ID.

DPH2

2 ports Panasonic Proprietary Door Phone Interface with door opener (no sensor interface)

RJ11

RJ11

RJ45

RJ45

RJ45

USB1

PSTN

8 ports

24 ports

AC Input
DC Battery input
FG

6 channels

RJ11

RJ11

RJ11

RJ11

SIP Trunk

Internet

Option

card