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9

Analog CO Interface

Number of Ports

4 Ports

Function

DSP function
  Dial pulse signal transmission function
  DTMF signal transmission function
  Polarity reversal detection function
  Bell detection function
  End-call signal detection function
  CPC signal detection function
  CODEC function
  u/A law switching function
  Programmable digital filter function
  Caller ID (FSK/DTMF) detection function
  CNG detection function
  Echo canceller function
2W/4W Conversion function
Surge Protection function

Interface Connector

Co Interface 

RJ11: 4ports

Extension Interface

Number of Ports

8 Ports

SLT Interface

2ch SLIC/CODEC
-27V/26mA Feeding function
Dial-pulse signal detecting function
DTMF signal detecting function
Bell signal issuing function
Hook detecting function
Ring trip detecting function
2W/4W converting function
  CODEC function
  Test function
  Programmable digital filtering function
  Serial Interface function
  Caller ID (FSK) generator function
Surge protective function

DTMF Receiver

8 Lines for each port

Caller ID (FSK) Sender

8 Lines for each port

On-board Ringer

20/25Hz 60Vrms, 75-85Vrms (for Malaysia)
Phase control (Three-phase/Four-phase)

External Interface Connector

Extension interface

RJ11: 4ports

Door-phone Interface

Number of Ports

2 Ports

Function

Door-phone connect detection function
Off-hook detection function
Power supply function
DSP function
  CODEC function
  u/A law switching function
  Programmable digital filter function
  Echo canceller function

Door-opener Interface

Number of Ports

2 Ports

Interface

Relay spec
  1A(max)
  AC24V/DC30V (max)
  70mΩ

Interface Connector

Door-phone

RJ11 x 1

Door-opener

4pin connector

10

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

11

LCOT4 block is responsible for supporting up to 4 ports Analog Trunk interface with Caller ID function.

A PLD (Programable Logic device) is equipped on KX-HT82480(LCOT4 Option Card), and this device has several interfacing func-
tions as below.

Transmits 10pps/20pps dial pulse by a open/close action between Tip and Ring with Photo MOS relay which is controlled by DSP
GPIO port.
The make width, break width and inter digit width for 10pps/20pps can be set respectively.

When making DP[0-3] pin of DSP becomes Low level, and PC902A-D turns ON. When breaking, DP[0-3] of DSP becomes High
level, and PC902A-D turns OFF.

SLIC

Number of Support Channel

2ch/device

Number of Devices

2

CPU Interface

Interface

SPI-BUS

Bus Clock

4.096MHz

Device Select Logic

DEV_SEL[2:0]

ACK Control

DSP ACK

Up to 2

TDM Interface

TDM TS

16bit x 32TS

TDM Clock

4.096MHz
Clock Slave

TDM -

SPI -IF

TDM -IF
SPI-IF

CPLD

DE56#1

DE56#2

FXO Interface Analog Circuit

RJ11

FXO Interface Analog Circuit

FXO Interface Analog Circuit

FXO Interface Analog Circuit

RJ11
JK900 - B

RJ11

RJ11
JK900 - D

TDM

-I

F

SPI

-I

F

Control(Reset/

Int)

13.824MHz

CL

K(13.824MHz)

nRESET_OUT

TDM-IF

SPI -IF

IF

+

-

+

-

+

-

REVDET[0]

DP[0]

*RL900A

NC

1

2

3

4

*D904A

2

1

R930A

C926A

IC909A

3

2

1

R944A

D910A

_

_

C930A

C935A

C901A

+3.3V_DE56_2

VH1

DG

+3.3V_DE56_2

+3.3V_DE56_2

IC909A

5

6

7

R943A

PC900A

1

23

4

VH1

C904A

C924A

DG

R936A

C921A

C933A

DG

PC903A

1

2

3

4

R920A

C908A

+3.3V_DE56_2

*R901A

+3.3V_DE56_2

R946A

Q900A

C906A

*C905A

*C907A

D908A

3

1

2

4

DG

PC902A

1

3

4

6

*C912A

T900A

3

1

6

4

5

*D902A

*D906A

R981A

VH1

R980A

DG

C960A

*ZNR900A

*R908A

*R932A

*C916A

*R938A

*C918A

*R954A

*C928A

*R906A

*R904A

*R948A

*R922A

*R916A

*R934A

*R940A

PC901A

1

2

3

4

*C910A

*Q904A

*R900A

R902A

R914A

R918A

R924A

R926A

R928A

R950A

R956A

12

Making DP[0-3] pin of DSP becomes Low level, and PC902A-D turns ON and the line is acquired.
It is used in common as Dial Pulse transmitting circuit.

1. Ring 

 D902  D906  D908  Q900(C-E)  Q904(C-E)  R920  D908  Tip

2. Tip 

 D908  R920  Q904(C-E)  Q900(C-E)  D908  D906  D902  Ring

After line acquisition, DC and/or AC characteristics (Dynamic Range and Distortion etc) are controlled by current controll function of
DC Loop Circuit.
Also it provides the SHUNT control function for the stabilization of line power depending on the destination. Turning on  PC903A-D
when transmitting pulse reduces the impedance at making, and stabilizes the line power.

DTMF signal is generated by DTMF generator in the DSP device.

+

-

+

-

+

-

REVDET[0]

DP[0]

*RL900A

NC

1

2

3

4

*D904A

2

1

R930A

C926A

IC909A

3

2

1

R944A

D910A

+3.3V_DE56_2

C930A

C935A

C901A

+3.3V_DE56_2

VH1

DG

+3.3V_DE56_2

+3.3V_DE56_2

IC909A

5

6

7

R943A

PC900A

1

23

4

VH1

C904A

C924A

DG

R936A

C921A

C933A

DG

PC903A

1

2

3

4

R920A

C908A

+3.3V_DE56_2

*R901A

+3.3V_DE56_2

R946A

Q900A

C906A

*C905A

*C907A

D908A

3

1

2

4

DG

PC902A

1

3

4

6

*C912A

T900A

3

1

6

4

5

*D902A

*D906A

R981A

VH1

R980A

DG

C960A

*ZNR900A

*R908A

*R932A

*C916A

*R938A

*C918A

*R954A

*C928A

*R906A

*R904A

*R948A

*R922A

*R916A

*R934A

*R940A

PC901A

1

2

3

4

*C910A

*Q904A

*R900A

R902A

R914A

R918A

R924A

R926A

R928A

R950A

R956A

+

-

+

-

SIGN6843

C926A

IC909A

3

2

1

R944A

C930A

C935A

VH1

DG

IC909A

5

6

7

R943A

VH1

C924A

IC909A

4

VEE

8

VCC

R936A

C921A

C933A

+15V

R946A

*C912A

T900A

3

1

6

4

5

R981A

VH1

R980A

DG

C960A

*C937A

*R932A

*C916A

*R938A

*C918A

*R954A

*C928A

*R948A

*R934A

*R940A

R950A

R956A

From DSP