OptiX 2500+ Transmission System

OptiX 2500+ Transmission System

SYSTEM OVERVIEW

OptiX 2500+

ContentContent

• Rack and Related Parts

• Sub-rack

• Boards

• Auxiliary Parts

Power BoxPower Box

-48V(1st way) Alarm mute switchAcoustooptic test switch Indicator

Main switch (1st way) Protective

GroundPower switch of

the upper subrack

Working ground

Power switch of

the lower subrackPMU board

Main switch (2nd way)

-48V1 -48V2PGNDBGND

-48V1 -48V2

-48V(2nd way)

UPPERSUBRACK LOWERSUBRACK

RMU

MUTE TEST

ALM

RUN

PMU PMU

1. Generate ringing current 2. Monitor the voltage of the power supply

3. Monitor temperature in the Rack

4. Communicate with the SCC board.

1 2 3 4

Communicate with which sub-rack?

Sub-rackSub-rack

External InterfaceExternal Interface

Board Insertion AreaBoard Insertion Area

Board Insertion Area at the Front Subrack

I II II II II II IX X

U UU UU UU UU UU UC

S

C

C

C

1 72 83 94 105 116 12S S

I

U

P

Optical fiber/electrical cable leading area

FAN

XCS:1+1 protection

SCC:SCC board

IUP:protection slot

IU1~IU4,IU9~IU12:boards need Electrical interface

Access Capacity of IU SlotAccess Capacity of IU Slot

IU slot

1 2 3 4 5 6 7 8 9 10 11 12/P

Capacity 4 4 4 16share

16 16 16 16 16share

4 4 4

System OverviewSystem Overview

Cross-connect Unit

(High-order 96*96 VC-4)

(Low-order 2016*2016 VC-12)

IU

IU

IU

IU

IU

IU

IU

IU

IU

IU

IU

IU

TimingUnit

Axiliaryinterface unit

SCC and OHP unit

Interface Unit Interface Unit

ManagementinterfaceAuxiliary

interfaceExternal sychronization interface

PDH Access UnitPDH Access Unit

What PDH boards do we have in 2500+?

• PD1 : 32×E1• PQ1 : 63×E1• PM1 : 32×E1/T1• PQM : 63×E1/T1• PL3: 3×E3• PD4: 2 X E4

IndicatorIndicator

Green indicator:Operation status indicator

5 times per second : the board is not in working status.

once every other second :the board is in working status.

Twice every other seconds:the communication with the

SCC board is interrupted.

IndicatorIndicator

Red indicator: Alarm Indicator

3 times per second :critical alarm

twice per second:major alarm

once per second :minor alarm

constant on:board failed

SDH Access UnitSDH Access Unit

OptiX 2500+

SDH Access UnitSDH Access Unit

SDH boards in different levels

• S16: 1 x STM16

• SL4: 1 x STM4

• SL1: 1 x STM1

• SD4: 2 x STM4

• SPQ4: 4 x STM-1

SCC BoardSCC Board

OptiX 2500+

SCC BoardSCC Board

PrinciplePrinciple

mailbox

OHP

CPU

DCC

to boards

to boards

NM interface

F& f interface

OAM interfaceAlarm interface

So what can SCC do for us?

SCC BoardSCC Board

ApplicationsApplications

ID--- the only physical identification of NE

ONOFF

D7 D6 D5 D4 D3 D2 D1 D0

ID=9, IP=129.9.0.9

SCC BoardSCC Board

SCC board has one more indicator ETN (yellow)

-- indicator for communication status

statuson--connection between NE and NM is ok

flash--data transmitted between NE and NM

when there's a call dialing in, the alarm indicator willquick flashes.

IndicatorIndicator

SCC BoardSCC Board

WAN Modem Connection (two ways)WAN Modem Connection (two ways)

X.25 interface

Modem

Modem

Serial interface

NE C

NE B

NE A

NE D

PSTNModem

Modem

NE C

NE B

NE A

NE D

PSTN