Otc103101 Optix Bws 1600g System Hardware Issue2.1

Optical Network Curriculum

Development Section

Optical Network Curriculum

Development Section

ISSUEISSUE

OTC103101 OptiX BWS 1600G System Hardware

OTC103101 OptiX BWS 1600G System Hardware

2.12.1

Confidential Information of Huawei. No Spreading without Permission.

Security Level: Internal

2

IntroductionIntroduction

In DWDM theory, What kind of Key technologies

have we learned?

Next, we will learn OptiX BWS 1600G DWDM

Optical Transmission System Equipment.



3

ObjectivesObjectives

Grasp the general structure of OptiX BWS 1600G

DWDM System,

Understand the working principle of boards in

OptiX BWS 1600G DWDM System,

Grasp the functional features of boards in OptiX

BWS 1600G DWDM System.

Upon completion of this course, you will be able to:



4

Reference MaterialReference Material

WDM Principle

OptiX BWS 1600G Hardware Description Manual



5

ContentsContents

Chapter Ⅰ: System Overview

Chapter :Cabinet and SubrackⅡ

Chapter Ⅲ:Boards



6

System OverviewSystem Overview

OptiX BWS 1600G

Designed for ultra high capacity optical backbone transmission

network.

It allows to transmit 160 channels simultaneously, with

maximum of 10Gbit/s data rate, over single strand of optical

fiber.

C-band and L-band are provided .

C band:192.10THz-196.05THz(1529.16nm-1560.61nm)

L band:186.95THz-190.90THz(1570.42nm-1603.57nm)



7

The position of OptiX BWS 1600G system in an optical transmission network

The position of OptiX BWS 1600G system in an optical transmission network

OptiX BWS 1600GOptiX BWS 320G

Backbone Layer

OptiX Metro 3100

OptiX 2500+

OptiX Metro 6100OptiX 10G

OptiX 10G

OptiX 2500+

OptiX 155/622OptiX Metro 500/1000

OptiX Metro 500/1000

Tandem Layer

Access Layer

OptiX Metro 6100 OptiX Metro 6100

OptiX Metro 6100

OptiX 2500+

OptiX 155/622

OptiX 155622H

160 channels 32 channels

STM-16 32 channelsSTM-64

STM-16STM-4

STM-4/1

STM-4/1

STM-4/1OptiX Metro 3000

OptiX OSN 9500OptiX BWS 1600G



8

Equipment Technical FeaturesEquipment Technical Features

Ultra capacity with high accuracy

Smooth capacity expansion

Multi-rate and multi-service access

Long haul transmission

Timing signal transmission

Uniform intelligent network management system



9

High Efficient Multi-service AccessHigh Efficient Multi-service Access

• Multiple interfaces available for various applications

2.5G2.5G2×GE2×GE LDG

10G10G

4X2.5G4X2.5G OCU

34M~2.5G arbitrary bit rate

LWX

155M/622M/2.5Gconfigurable

LWM

2.5G2.5G 2.5G2.5G TWC

10G10G

10G10G LWF

DWDM



10

Types of 1600G System Types of 1600G System

Types Channel spacing

Characteristics of five types of systems

OptiX BWS 1600G-I

50GHz Scalable 1600G system, support long haul and large capacity transmission.

OptiX BWS 1600G-II

100GHz 80 channel system(40 channels in C-band and 40 channels in L-band), each channel can carry up to 10Gbps, Maximum capacity is 800Gbps.

OptiX BWS 1600G-III

100GHz 40 channels in C-band, each channel can carry up to 10Gbps, Maximum capacity is 400Gbps

OptiX BWS 1600G-IV

100GHz For G.653 fiber, mainly be used in L-band.

OptiX BWS 1600G-V

100GHz 40 channels in C-band, each channel can carry up to 2.5Gbps, Maximum capacity is 100Gbps

OptiX BWS 1600G-VI(LHP)





11

ContentsContents

Chapter Ⅰ: System Overview


Chapter Ⅲ: Boards



12

Section 1 CabinetSection 1 Cabinet

Section 2 Sub-rack

Section 3 DCM and HUB

Section 4 ODF Sub-rack

Chapter 2 Cabinet and SubrackChapter 2 Cabinet and Subrack



13

Cabinet StructureCabinet Structure

Cabinet Dimension

A. 2200 (H) X 600 (W) X 300 (D)

B. 2600 (H) X 600 (W) X 300 (D)



14

Structure of CabinetStructure of Cabinet

Cabinet Description

1. Back plate

2. Fiber channels

3. Back support

4. Front support

5. Sliding protection plate

6. Fiber-blocking plate

7. Frames for DCM & HUB

(including front cover plate)

8. Sub-rack

9. Power box



15

Power BoxPower Box

1 OPU board 13 Mute Switch

2&3 Main power switches 14 RUN & ALM Indicators

4&5 Power ground Input 15 PMU Board

6&7 -48V/-60V Input 16 Subrack Com Interface

8,9,10 U, M, L subrack Switches 17 ALM Interface

11 Hub Switch 18 Power Output

12 TEST Switch 19 Protection Grounds



16

The Functions of Power BoxThe Functions of Power Box

PMU

Over-voltage Protection

Under-voltage Protection



17


Section 1 Cabinet

Section 2 Sub-rackSection 2 Sub-rack


Section 4 ODF sub-rack



18

Sub-rack StructureSub-rack Structure

Sub-rack Description

1. Interface Area

2. Air damper

3. Ventilation Tunnel

4. Board Area

5. Fiber Spool

6. Fiber Outlet Area

7. Fan Tray (with air filter )

8. Front Door

9. Hook

Max. power consumption: 650W (when fully-loaded)



19

Board Area in Sub-rackBoard Area in Sub-rack

13 Slots in sub-rack,

Slot 7 for SCC/SCE Board,

Fibers outlet from board panel,

Fiber Connector: LC/PC

IU1~IU6, IU8~IU13:38mm wide

IU7:24mm wide

I

U

1

I

U

2

I

U

3

I

U

4

I

U

5

I

U

6

SCC/SCE

I

U

8

I

U

9

I

U

1

0

I

U

1

1

I

U

1

2

I

U

1

3



20

Sub-rack Interface AreaSub-rack Interface Area

1. ETHERNET1 2. ETHERNET2 3.CLKIN 4. CLKOUT

5. OCU CLKIN 6. F&f 7. Serial1 8. Serial2

9. ALM 10. F1 11.OAM 12. POWER1

13.POWER2 14. Power Filter 15. Orderwire



21

Air circulation in OptiX BWS 1600G subrack Air circulation in OptiX BWS 1600G subrack

Air inlet and outlet should not be blo

cked; The cooling and ventilation system o

f OptiX BWS 1600G is very important;

Air outlet

Board area

Optical fiberwiring area

Fan box

Interface area Air damper

Air inlet



22


Section 1 Cabinet

Section 2 Subrack

Section 3 DCM and HUBSection 3 DCM and HUB

Section 4 ODF Cabinet



23

DCM and HUB DCM and HUB

1. DCM Frame 4. Hub Tray

2. Box 5. Hub

3. DCM 6. Fiber Fender

DCM:DCM: Accommodate two DCMs at most, HUB:HUB:Accommodate 2 Hubs at most, Power is supplied to the Hubs from the power box.The 2 Hubs are used alone, they can not be cascaded.



24


Section 1 Cabinet

Section 2 Subrack


Section 4 ODF CabinetSection 4 ODF Cabinet



25

ODF CabinetODF Cabinet

OptiX BWS 1600 system offers a optional ODF

cabinet.

Optical fiber terminal unit is located at the left

side of the cabinet. At most, four optical fiber

terminals can be mounted. Each unit has 12 rows

and 8 columns, so total of 96 flanges can be fixed.

1. Spool 2. Front door 3. Terminal unit



26

QuestionsQuestions

1.Please describe the architecture of OptiX BWS 1600

System Cabinet.

2.What is the structure of OptiX BWS 1600G subrack?

3.Please describe the structure and function of OptiX BWS

1600G ODF cabinet.



27

Chapter : System OverviewⅠ


Chapter : BoardsⅢ

ContentsContents



28

OTM Signal Flow-Transmitting SideOTM Signal Flow-Transmitting Side

OTU

OTU M40

OTU

OTU M40

OTU

OTU M40

OTU

OTU M40

FIU

OAU

OAU

SC1

MCA

C

L

DCM

DCM

ITL

ITL

C-

C-

L-

L-

EVEN

ODD

EVEN

ODD



29

OTM Signal Flow-Receiving SideOTM Signal Flow-Receiving Side

OTU

OTU D40

FIU

OAU

OAU

SC1

MCA

OTU

OTU D40

OTU

OTU D40

OTU

OTU D40

RPA-C

RPA-L

L

C

DCM

DCM

ITL

ITL

C-EVEN

C-ODD

L-EVEN

L-ODD



30

OptiX BWS 1600G－ III Signal FlowOptiX BWS 1600G－ III Signal Flow

FIU

DCM

C-EVENRPCOAUOTU

40

1

D40

MCA

FIU

DCM

C-EVEN

SC1/TC1

M40/V40

1

40

OTU OAUDWDM

Client Side Signal



31

Chapter 4 BoardsChapter 4 Boards

Section 1 Optical Transponder UnitSection 1 Optical Transponder Unit

Section 2 OM/OD/OADM Unit Section 2 OM/OD/OADM Unit

Section 3 Amplifier Unit Section 3 Amplifier Unit

Section 4 Other Function Unit Section 4 Other Function Unit



32

Optical Transponder UnitOptical Transponder Unit

Board Name

Full Name System

LWF STM-64 Transmit-receive Line Wavelength Conversion Unit with FEC Function I,II,III,IV

LWS STM-64 Transmit-receive Line Wavelength Conversion Unit with Enhanced FEC Function

I,II,III,IV

LRF STM-64 Line Regenerating Wavelength Conversion Unit with FEC Function I,II,III,IV

LRS STM-64 Line Regenerating Wavelength Conversion Unit with Enhanced FEC Function

I,II,III,IV

RWF STM-64 Receiving Optical Wavelength Unit with FEC Function II,III

TWF STM-64 Transmitting Optical Wavelength Unit with FEC Function II,III

TRF STM-64 Optical Transmitting Regenerator with FEC Function II,III

LWC STM-16 Line Wavelength Conversion Unit II,III,V

TWC STM-16 Transmitting Optical Wavelength Conversion Unit II,III,V

TRC STM-16 Optical Transmitting Regenerator II,III,V

OCU Quadruple STM-16 MUX STM-64 Optical Wavelength Conversion Unit with FEC

I,II,III,IV

LDG 2Gigabit Ethernet Unit II,III,V

LWX Arbitrary Bit Rate Wavelength Conversion Unit II,III,V

LWM Multi-rate Optical Wavelength Conversion Unit II,III,V



33

LWF LWF



34

LWFLWF

STM-64 SDH signal ITU-T G.692 compliant DWDM signal the channel spacing of LWF board is 50GHZ or 100GHz Support NRZ and super CRZ coding in the line. Error correction coding: Comply with the FEC encoding specified in ITU-

T Recommendation G.709. The B1, B2 and J0 bytes are monitored Automatic Laser Shutdown (ALS) function is controlled by NMS.



35

LWFLWF

OptiX BWS 1600G has two different types of LWF board, applicable to

different systems:

The LWF supporting optical power adjustment and wavelength lock

functions is used in OptiX BWS 1600G-I and IV system, and L band of type

II system.

The LWF not supporting VOA and wavelength lock function is used in C

band of OptiX BWS 1600G-II and III system.

LRF (STM-64 Line Regenerating Wavelength Conversion Unit with FEC

Function) , It is used in REG node.



36

LWFLWF

Category

Flash State Description

Alarm indicator (Red)

Off No alarm

Three times every other second Critical alarm

Twice every other second Major alarm

Once every other second Minor alarm

Running indicator (Green)

Five times per second Not in service

Once every two seconds In service

Once every four seconds (2 seconds on and 2 seconds off)

The communication with SCC unit is interrupted, and is in off-line working state



37

List of LWF board alarmsList of LWF board alarms

Alarm Description CausesRed indicator flashes

Alarm category

FEC-LOF Loss of receive FEC frame

1. Receiving signal deteriorated 2. Remote station transmitting signals do not have FEC frame structure

Three times every other second

Critical

FEC-OOF Received FEC frame is out of frame

1. Receiving signal deteriorated 2. Remote station transmitting end problem


Critical

NO-BD-SOFT No board software Software is not loaded on the board Three times every other second

Critical

R-LOS Loss of signals at receiving end

1. The optical fiber is broken2. The attenuation of optical path is too high3. Fault occurs in the transmitting part of remote end


Critical

IN-PWR-LOW Input power too low 1. Input optical power is too low 2. The attenuation is too large

Twice every other second

Major

IN-PWR-HIGH

Input power too high

1. Input optical power is too high 2. Proper attenuation is not added


Major

BD-STATUS Board is not in the position

No board in slot, board mailbox faulty or board is not properly inserted


Major



38

LWS LWS

LWS can carry out the wavelength conversion in two

directions. The implementation of EFEC gives high quality

transmission and longer haul transmission without any

electrical regenerator than FEC,

It converts the client side signal to the G.692-compliant

standard wavelength optical signal,

Channel spacing: the channel spacing of LWS board is 50GHZ

or 100GHz.

Features:



39

OCU OCU

OCU board is quadruple STM-16 MUX STM-64 optical wavelength

conversion unit with FEC.

The channel spacing of OCU board is 50GHz or 100GHz.

The B1, B2 and J0 bytes are monitored to help locating the fault .



40

OCUOCU

RUN

ALM

OCU

IN OUT

Tx1Tx2 Tx3Tx4

Rx1Rx2 Rx3Rx4

OCU board performance parameters include:

B1 error counting and B2 error counting.

Output/input optical power, laser bias current, laser cooling

current, laser working temperature and ambient temperature

monitoring.

NameConnect

or type

Description

IN LC Connected with D40/MR2, receive DWDM signal.

OUT LC Connected with M40/MR2, transmit DWDM signal.

Tx1~Tx4 LC Connected with customer equipment, transmit SDH signals to external equipment.

Rx1~Rx4 LC Connected with customer equipment, receive signals from external equipment.

OCU can be inserted in slot: 1~5, 8~12, If OCU board needs external clock, it shall be inserted in slot 12/10/8/5/3/1 in turn.



41

LWCLWC

The channel spacing of the board is 100GHz, It is mainly used in

system V with only the channel rate of 2.5G.

B1 error counting, B2 error counting.

Automatic Laser Shutdown (ALS) function is controlled by NMS.

TRC is used for electrical regeneration.



42

LDGLDG

The 2 Gigabit Ethernet unit, multiplexes 2 GE (Gigabit Ethernet) channels

into one ITU-T G.692-compliant STM-16 optical signal for DWDM transmission.

It provides two GE optical interfaces (IEEE 802.3z compliant) at the client side. the channel spacing of the board is 100GHz. In REG station, TWC is used as the regenerating board of LDG.



43

LDGLDG

NameConnector type

Description

IN1, IN2 LC Connected with D40/MR2 board, receive DWDM signal.

OUT1, OUT2

LC Connected with M40/MR2 board, transmit DWDM signal.

Tx1~Tx2 LC Connected with GE customer equipment, transmit IEEE 802.3z standard signal.

Rx1~Rx2 LC Connected with GE customer equipment, receive IEEE 802.3z standard signal.



44

LWX LWX

LWX receives arbitrary rate signal (34Mbit/s~2.5Gbit/s) at

1280~1565nm and converts it into standard wavelength

DWDM signal in compliance with ITU-

LWX can satisfy the access of non-common service, such as

PDH (34M, 45M, 140M optical interface), ESCON (200M),

Fiber Channel (1.6G).

the channel spacing of the board is 100GHz. It can be used

in the system with channel spacing as 100GHz, such as OptiX

BWS 1600G system II, III and V.

Functions and features:



45

LWMLWM

LWM supports the wavelength conversion for three signal

rates: STM-1/OC-3, STM-4/OC-12 and STM-16/OC-48, and

supports SDH/SONET and various concatenated services.

the channel spacing of the board is 100GHz.

LWM board provides B1 monitoring .

Functions and features:



46

Other OTUsOther OTUs

To guarantee the compatibility,we can adopte the universal

wavelength conversion boards in other DWDM system.

TWF:STM-64 Transmitting OTU Board with FEC Function

RWF:STM-64 Receiving OTU Board with FEC Function

TRF:STM-64 Regenerator OTU Board with FEC Function.

Notes:

Different Error correction coding;

TRF can be used on the electrical regenerator equipment

corresponding to OCU.

LGS: convert one GE and one STM-1/4 into STM-16

LQS: convert four low-rate SDH signal into STM-16



47

Chapter 4 Board UnitChapter 4 Board Unit


Section 2 Optical Multiplex/Demultiplex/Add/Drop Section 2 Optical Multiplex/Demultiplex/Add/Drop

Unit Unit


Section 4 Other Function UnitSection 4 Other Function Unit



48

Optical Multiplex/Demultiplex/Add/Drop UnitOptical Multiplex/Demultiplex/Add/Drop Unit

In OptiX BWS 1600G System,We will study…

Optical multiplexing/ demultiplexing unit (OM/OD)

M40 40-channel Multiplexing Unit I,II,III,IV,V

V40 40-channel Multiplexing Unit with VOA I,II,III,V

D40 40-channel Demultiplexing Unit I,II,III,IV,V

Optical add/drop unit (OADM)

MR2 2-channel Add/Drop Unit I,II,III,IV,V

MB2 Expandable 2-Channel Optical Add/Drop Multiplexing Board



49

M40 M40

M40 can multiplex 40 optical wavelengths at most. According to the workin

g wavelengths and channels, M40 is available in four types, called C-ODD,

C-EVEN, L-ODD and L-EVEN accordingly.

channel spacing of the M40 board is 100GHz.



50

M40M40

A dedicated monitoring port (MON) is provided;

Support optical power detecting and the alarms & perfor

mance reporting.

Performance events of M40 include:

total output optical power, AWG heating/cooling current,

AWG working temperature and environmental temperat

ure of board.

Name Description

M01~M40 Connected with “OUT” port of 40 OTUs, receives 40 channels corresponding signals

OUT Connected with ITL or OAU, transmits multiplexed signal.

MON Connected with MCA, accomplishes online monitoring of optical spectrum.



51

M40--AlarmsM40--Alarms


Alarm category

MUT-LOS Loss of multiplex signal

1. Output optical power detecting circuit is faulty or board failed2. or too high line attenuation


Critical




Major

SUM-OUTPWR-HI Output optical power of main path is too high

Too high output optical power


Major

SUM-OUTPWR-LOW Output optical power of main path is too low

Too low output input optical power


Major

FPGA-ABN FPGA status is abnormal

1. Main FPGA is not present when board is started2. Main FPGA loading fail


Major

TEMP-ALARM Temperature alarm Ambient temperature crosses threshold

Once every other second

Minor



52

V40 V40

Difference between V40 and M40:

V40=VOA＋ AWG.

V40 is a multiplexing unit with built-in variable optical attenuat

or.

V40 is used only for C-band, and is available in two types i.e.

C-ODD and C-EVEN.



53

D40D40

D40 is 40-channel optical demultiplexer unit. Similar to M40, it is available in 4

types according to the working wavelengths, called C-ODD, C-EVEN, L-ODD

and L-EVEN

AWG Type, Channel spacing: 100GHz.

Support optical power detecting and the alarms & performance reporting.

A dedicated monitoring port (MON) is provided.



54

D40D40

MON IN D01D02 D03 D04 D05D06

D07D08 D09 D10 D11 D12 D13 D14

D15 D16 D17 D18 D19 D20 D21 D22

D23D24 D25D26 D27D28 D29 D30

D31D32 D33D34 D35D36

D37D38 D39 D40

RUN

ALM

D40

Name Description

D01~D40

Connected with “IN” port of 40 OTUs, transmits 40 channels corresponding signals to OTUs

IN Connected with ITL or OAU, receives multiplexed signal.

MON Connected with MCA, accomplishes online monitoring of optical spectrum.

Performance events of M40 include:

total output optical power, AWG heating/cooling current,

AWG working temperature and environmental

temperature of board.



55

MB2MB2

OADM opticalmodule

IN

OUT

BMO

BMI

D01 D02

A01 A02

SCC

MRI

MRO

CPU

Mailbox



56

MR2MR2

An MR2 board can add/drop two service channels with

100GHz channel spacing.

In type I, II, III and V system, MR2 board can add/drop

channel in C-band; in type IV system, MR2 will add/drop

service channel in L-band.



57

MR2MR2

Name Description

A01~A02 Connected with OTU, receive (add) accessing channel at home station

D01~D02 Connected with OTU, transmit (drop) service channel to local station

IN/OUT Input/output from main DWDM path i.e. connected with ITL

MI/MO Cascading input/output interface of MR2

Interfaces:

AlarmsAlarm Description Causes

Red indicator flashes

Alarm Level

MUT-LOS Loss of multiplex signal

1. Output optical power detecting circuit is faulty or board failed2. Fiber is not connected or the connection is poor


Critical

BD-STATUS

Board is not in the position



Major

TEMP-ALARM

Temperature alarm

Ambient temperature crosses threshold


Minor



58




Unit Unit


Section 4 Other Functional UnitSection 4 Other Functional Unit



59

Optical Amplifier Unit Optical Amplifier Unit

OptiX BWS 1600G offers a few types of optical fiber

amplifiers:

OAU/OBU/OPU

-Erbium-Doped optical Fiber Amplifier (EDFA)

RPA/RPC/RPL

-Raman optical fiber amplifier



60

Erbium-Doped optical Fiber AmplifierErbium-Doped optical Fiber Amplifier

C-band: OAU, OBU, OPU L-band: OAU, OBU

OAU-CG and OAU-LG:

when only the EDFA used in the system.

OAU-CR and OAU-LR

If Raman amplifier is installed together with EDFA

OBU board can also be classified in C band and L band.

OPU can amplify C-band 80 channels.



61

OAUOAU

An OAU (line amplifier) consists of PA (pre amplifier) and BA

(booster amplifier), An external DCM (dispersion compensation

module) can be attached in between these two amplifiers.OBU just have one BA module.



62

OAUOAU

Functions:

It can amplify 80 optical channels simultaneously, with 50GHz

channel spacing.

It can enable the full-band optical amplification of C and L

bands by using different types of OAU.

The gain provided by OAU board can be adjusted

continuously, and the typical gain is respectively 23dB, 28dB,

and 33dB;

For the provision of gain-locking function;

Provide gain flatness function.



63

OAUOAU

a gain shift erbium-doped fiber amplifier (GS-EDFA) is being used in L

band in type I system.

L-band OAU

Features:

It is a high-density, low loss special erbium-doped fiber.

the erbium-doped optical fiber can work in stable working

temperature, ensuring the stable gain curve and gain flatness

of L-band signal.The pump power for different wavelengths in L-band

is far lager than that in C-band.



64

OAUOAU


Alarm category

MUL-LOS Loss of multiplex signals

1. Output optical power detecting circuit is faulty or board failed2. Fiber is not connected or the connection is poor


Critical

OA-LOW-GAIN The gain of optical amplifier is lower

1. Pump laser is aged2. Input optical power is too high3. A/D detect circuit failed


Critical

IN-PWR-LOW Input optical power is too low

1. Input power is too low, maybe the too big attenuation is added2. Line attenuation is too large


Major

PUMP-TEMP-ALM

Pump temperature crosses threshold

1. Environmental temperature is high2. Laser cooling equipment is faulty


Major



65

Raman Amplifier (RPA) Raman Amplifier (RPA)

Optical fiber Raman amplifier is used at the receiving end of DWDM system to amplify optical signals.

OptiX BWS 1600G facilitates the network operators with three types of Raman amplifiers including RPC, RPL and RPA.



66

Raman Amplifier (RPA)Raman Amplifier (RPA)

The gain of Raman amplifier is 10dB. Used with appropriate

EDFA, it enables the flatness of system gain to be less than

2dB, so the noise figure will be greatly reduced.

In the OptiX BWS 1600G system, fiber Raman amplifier is

always used with the EDFA amplifier.

Provides pump power automatic locking, receive control

command to switch on/off pump source, divide signal light,

report various performances and alarms, and enable pump

laser protection.

Raman amplification requires a strong light source (pumping).



67


Name

Connector type

Description

LINE E2000/APC

Connected with optical fiber line, receive remote signals (other station)

EXT E2000/APC

Extended interface of RPC, connected with RPL so that full band transmission can be realized

SYS E2000/APC

Connected with FIU, transmit amplified signals to the local equipment

MON LC Connected with MCA

RUN

ALM

RPL

OUT

OUT E2000/APC RPL output, connected with RPC



68


AlarmDescription

CausesRed indicator flashes

Alarm category

OUT-PWR-HIGH Output power is too high

1. Laser driving circuit failure2. Detecting circuit failure


Major

OUT-PWR-LOW Output power is too low

1. Laser driving circuit failure2. Detecting circuit failure


Major

PUMP-TEMP-ALM Pump temperature crosses threshold

1. Environmental temperature is high2. Laser cooling equipment is faulty


Major

PUMP-COOL-ALM Laser cooling current crosses threshold

1. Environmental temperature is very high2. Laser is aged


Major

POWER-FAILURE Board power failure alarm

Power failure or power is off


Major

W-R-FAILURE Write/read register failed

Chip register damaged Twice every other second

Major




Major



69




Unit Unit


Section 4 Other Functional Unit Section 4 Other Functional Unit



70

Other Functional UnitOther Functional Unit

In this part,we will learn…

SC1/SC2、 TC1/TC2

OCP、 OLP、 SCS

Optional part,including…

MCA

VA4

DCM

ITL

FIU



71

SC1/SC2 SC1/SC2

The supervisory board is mainly monitors the optical channels, collects an

d transmits the orderwire & NM information.two different types of boards ar

e used, named SC1 & SC2.

SC1 is a single-directional optical supervisory channel unit, used in OTMs.

SC2 is dual-directional supervisory channel unit, used in OLA, REG, and

OADM.



72

SC1/SC2SC1/SC2

SC1/SC2 board is independent from the main control board;

SC1/SC2 is transmitted in sections, with 3R function.

The signal wavelength of supervisory channel in OptiX BWS 1600G

system I, II, III and V is 1510nm, while the wavelength of supervisory

signal in system IV is 1625nm.

Features:



73

SC1/SC2SC1/SC2

RUN

ALM

TM RM

SC1

RUN

ALM

TM1 TM2

SC2

RM1 RM2

NameConnector type

Description

TM1/TM2 LC Connected with FIU, to transmit supervisory channel

RM1/RM2 LC Connected with FIU, to receive supervisory channel



74

SC1/SC2SC1/SC2

Alarm Description CausesAlarm indicator flashes

Alarm category

R-LOS Loss of signals at receiving end

1. The optical fiber is broken2. The attenuation of optical path is too high3. Fault occurs in the transmitting part of remote end


Critical

R-LOF Loss of frame at receiving end

Input optical power is too low or excessive bit errors.


Critical

NO-BD-SOFT No board software Software is not loaded on the board Three times every other second

Critical

IN-PWR-LOW Input power too low 1. Input optical power is too low 2. The attenuation is too large


Major

IN-PWR-HIGH Input power too high 1. Input optical power is too high 2. Proper attenuation is not added


Major

OUT-PWR-HIGH

Output power too high Optical transmitting module fault or wrong optical module parameters setting


Major

OUT-PWR-LOW

Output power too low Optical transmitting module fault or wrong optical module parameters setting


Major

LOOP-ALARM Indication of loop in operation

1. Loop command is in execution for the sake of media testing2. Auto-execution of loop by board for testing


Minor



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TC1/TC2TC1/TC2

TC1/TC2, not only accomplishes the supervisory channel p

rocessing function, but also provides the clock transmiss

ion function

Provide 3-channel E1 clock service add/drop, and provide ele

ctrical interface for the external synchronous signal and synch

ronous equipment timing source.

Clock interface ： 2048kbit/s or 2048kHz .

Provide equipment-level 1+1 board protection, and double opt

ical wavelength redundancy protection. Supervisory informatio

n and clock signals are transmitted in both 1510nm and 1625

nm.



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SCCSCC

it accomplishes all the management functions and is responsible for the

communication between the equipment and network management

system. It implements the orderwire overhead processing as well.

The only difference of SCE with the SCC lies in its absence of orderwire

overhead processing function .



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SCCSCC

Name Description

RST Reset button for board resetting

ALC Alarm switch is used to activate or deactivate the alarm buzzer which located at the top of the Cabinet

SCC can be inserted in slot: 7



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SCCSCC

Alarm DescriptionAlarm indicator flashes

Alarm category

NESTATE-INSTALL NE is in being installed Three times every other second

Critical

FAN-FAIL Fan failure Twice every other second Major

POWER-FAIL Power fail Twice every other second Major

CFGVERIFY Configuration is not verified Twice every other second Major

BD-STATUS Board is not in the position Twice every other second Major

TEMP-ALARM Temperature crossed the threshold Once every other second Minor



79

OCPOCP



80

OCPOCP

Features: The function of OCP (optical channel protection) board is to

protect OTU wavelength channel to Ensure uninterrupted service

channel transmission.

The OCP board is usually placed in between OTU and SDH

equipment accessed. OCP board provides 1:8 OTU protection.

APS (automatic protection switch) protocol is involved in 1:8 OTU protection.

The whole switching process is completed within 200ms.



81

OLPOLP



82

OLPOLP

NameConnect

or type

Description

T/R LC Connected with FIU and access line signals

T01/T02 LC Connected with both active/standby optical fibers to transmit at transmitting end

R01/R02 LC Connected with both active/standby optical fibers to receive at receiving end



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OLPOLP

Pw≤-34dBm， Pp≤-34dBm,OLP board will not generate protection

switching;

Pw≤-35dBm， Pp>-34dBm,OLP board will generate protection swit

ching from the active fiber to the standby fiber;

Pw>-34dBm， Pp≤-35dBm,OLP board will generate protection swit

ching from the standby fiber to the active fiber;

Pw>-35dBm,Pp>-35dBm

（ i） |Pw-Pp|≥5dB ,services will be switched to the fiber with larger op

tical power

（ ii） 3dB≤|Pw-Pp|<5dB ,No switching occurs, but corresponding alar

m is reported.

（ iii） |Pw-Pp|<3dB, It means that both active and standby fibers are i

n normal status



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SCSSCS

Sync optical channel separator (SCS) board helps in providing

system protection at optical path and OTU level :

No need the support of protocol, and it executes switching by detecting

SD and SF events of the channel.

When LOS, B1-EXC alarms are reported, the system triggers the

automatic switching process.



85

MCAMCA

MCA (Multi-channel spectrum analyzer unit) facilitates with built-in

online spectrum analysis and supervisory function. it can supervise central wavelength, power, OSNR and other

parameters of optical signal for 8 channels. MCA board accesses the signals to be tested, from monitoring ports

(MON) located at M40, V40, D40, OAU and FIU etc.



86

VA4VA4

Features:

VA4 board is used for optical power adjustment and

equalization.

One VA4 can process four optical channels. It drives the

variable optical attenuator according to the control command

sent by the SCC.

VA4 board is mainly used in OADM equipment. It is also

located before M40 to achieve the power adjustment of the

accessed optical power signals.



87

DCMDCM

It uses negative dispersion slope to compensate the positive d

ispersion of transmitting fiber, so as to maintain the original sh

ape of the signal impulse.

DCM is installed between PA and BA of optical amplification u

nit of OTM, OADM and OLA equipment.

a DCM unit is classified in C & L band DCMs.

Typical compensation distance are 20km、 40km、 60km、80km、 100km；

Features:



88

ITLITL

ITL board is only used in OptiX BWS 1600G-I and II system,

multiplexing/demultiplexing the odd channels and even channels.

The optical module comprises two interleavers, converges ODD and

EVEN channels to one stream with 50GHz channel spacing and sends to

FIU board.

Features:



89

FIUFIU

FIU (Fiber Interface Unit) is located in front of the supervisory channel board

and behind the amplifier unit in OptiX BWS 1600G system.

FIU has four types of different specifications:

the first type FIU-I board is only used in the system needing clock protection

(1625nm protection wavelength).

The second type FIU-II is only applicable in the 1600G system without clock

protection.

The third type FIU-III only supports the multiplexing/demultiplexing of C band

and supervisory signals (1510nm). The board components are then reduced and

the cost is saved. It is used in C band 400G/100G system (System III, V).

The fourth type FIU-IV only supports the multiplexing/demultiplexing of L band

and supervisory signals (1625nm), applied in the 400G system of L band (i.e.,

system IV).



90

FIU-IFIU-I

FIU-I receives main channel signal from optical fiber through IN

interface, then divides it into C and L bands signals. C band signal is

further processed to extract the optical supervisory channel (1510nm)

and L band signal is further processed to extract the protective

optical supervisory channel (1625nm)

FIU-II board is used. Two WDM

optical couplers can be omitted in

L band, both at transmitting and

receiving ends.



91

FIU-IIIFIU-III

FIU-III board used in C band 400G system only includes two WDM compon

ents, multiplexing/demultiplexing the C band signal and supervisory signal i

n the transmitting and receiving directions respectively.

FIU-IV board used in L band 400G system

only includes two WDM components,

multiplexing/demultiplexing the L band signal

and supervisory signal in the transmitting and

receiving directions respectively.



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From left to right:FIU-I、 FIU-II、 FIU-III

Name Description

TC/TL Connected with OAU, transmit C/L band channels

RC/RL Connected with OAU, receive C/L band channels

IN/OUT Connected with fiber

TM/RM Transmit/Receive supervisory channel over 1510nm

TMB/RMB Transmit/Receive backup supervisory channel over 1625nm

MON Connected with MCA



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Documents

Otc103101 Optix Bws 1600g System Hardware Issue2.1