Technical Descriptions; Block Diagram - Panasonic KX-NS500AG Service Manual

4 Technical Descriptions

4.1.

Block Diagram

The NS500 series PBX is constructed in Main Unit (NS500) and up to three expansion unit (NS520).
In Main Unit (NS500), CPU Board (MPR) (Master Processor) which controlls whole call of this system is equipped, and, in an
expansion unit, CPU Board (SPR) (Slave Processor) controlling various line interfaces in the unit is equipped with.
Each expansion units are connected to Main Unit with star topology, and time slot exchange function is equipped in Main Unit.
The exclusive interface between basic and expansion units are built with one pair of TDM interface of 8.192MHz, and voice chan-
nel, control channel and addition information channel are secured.
All interface cards except digital extension intefarce (DHLC/DLC) are controlled by CPU Board (MPR)/CPU Board (SPR) directly.
Table.1 Main Unit Card Description
Card
CPU Board (MPR)
Main Unit Mother Board
(LCOT6+MCSLC16+DLC2)
Table.2 Expansion Unit Card Description
Card
CPU Board (SPR)
Expansion Unit Mother Board
(MCSLC16)
LED(2)/SW(1)/USB Host(1)
CPU
MPR
Master
CortexA8
FPGA
600MH
DDR3
512MB
NAND
1GB
SRAM
512KB
SD Card
DSP
RMT
EXP-M
Trunk/DPH
Extension
Fig.1 Block Diagram
Master CPU of NS500 system which controls Main Unit and up to three expansion unit.
Ext and Trunk combo card which support analog trunk (6ch), analog extension line (16ch) and digital exclusive
line (2ch).
CPU Board (SPR) is a sub CPU card controlling the line card in the expansion unit.
Extension line card.
Main Unit
PLD2
Trunk
CO_PLD
IIO
LCOT6
DSPG
DE56x3
Mother Board
Description
Description
7
DPT
I/F
2port
PLD1
Extension
EXT_PLD
SPI
MCSLC16
S-lab
SLIC/CODEC
x8
KX-NS500AG