OTA105102 OptiX OSN 2500 Hardware System Overview ISSUE1.0

Optical Network Curriculum

Development Section

ISSUE

OTA105102 OptiX OSN 2500

Hardware System Overview

1.0

2

Confidential Information of Huawei.

No Spreading without Permission. Security Level: Internal

Objectives

Grasp the structure of the

equipment

Grasp the main function of

every mentioned board.

Grasp the signal flow and the

alarms

Upon completion of this course,

you will be able to:

3



Contents

Rack and Related Parts

Sub-rack

Service Boards

Auxiliary Parts

4



Equipment Overview OptiX OSN 9500

Backbone

OptiX OSN 3500 OptiX 10G

OptiX OSN 3500

OptiX OSN 2500

OptiX OSN 1500

OptiX OSN 2500OptiX OSN 1500

Aggregation

Access

GSM/CDMA/

WCDMAEthernet DDNPSTN ATM. . .

Position of the OptiX OSN 2500 in transport network

5



Rack

Dimension of rack:

1.

2000mm(H)X600mm(W)X600mm(D)

can contain 2 sub-racks

2.



3.



6



Power Box

NEG2(-)

INPUT

RTN2(+)RTN1(+) NEG1(-)

SW3/20ASW1/20A SW2/20A SW4/20ASW1/20A SW3/20ASW2/20A SW4/20A

1. Grounding STUD 2. PGND 3. RTN1(+)

4. RTN2(+) 5. NEG1(-) 6. NEG2(-)

7. Input cable terminal 8. Left output cable terminal 9.Right output cable terminal

7



Rack

Meanings of the indicators on the cabinet top

Indicator Description Status

On Off

Red

indicator

Critical alarm

indicator

The current equipment has a

critical alarm, which is

accompanied by an audible alarm.

The current equipment

does not have any

critical alarm

Yellow

indicator

Major alarm

indicator

The current equipment has a major

alarm, which is not accompanied

by an audible alarm.


does not have any major

alarm

Orange

indicator

Minor alarm

indicator

The current equipment has a minor

alarm, which is not accompanied

by an audible alarm.


does not have any minor

alarm

Green

indicator

Power

indicator

The power supply for the current

equipment is normal (-38.4 ~ -72V).

Power supply of current

equipment is interrupted.

8



Contents


Sub-rack

Service Boards

Auxiliary Parts

9



OSN 2500 is STM-1/4 MSTP equipment and can be upgraded to an STM-16 system

High integration: CXL1/4/16

Sub-rack has 9 traffic slots which can be split

Sub-rack has the ability of adding/dropping tributary traffic. Single sub-rack can process 252 E1, 14 E4, 48 E3/DS3 signal

Can access different types of signals

for example E1/E3/DS3/E4/ STM-1(o/e)/FE/GE

Sub-rack

Size 460mm (H) 440mm (W) 295mm (D)

Weight 18kg

10



Can be configured as 3

STM-16 ADMs

Support 120120 VC4

18.75Gand 9696 VC3 or 20162016 VC125Gcross connection

In the future it can be

smoothly be upgraded to

support 392392 VC3 or

80648064VC1220Gcross connection

Sub-rack

S

L

O

T

3

S

L

O

T

2

S

L

O

T

1

S

L

O

T

4

Fiber routing panel

SLOT 22

PIU

SLOT 25

PIU

SLOT 23

FAN

SLOT 24

FAN

S

L

O

T

17

S

L

O

T

16

S

L

O

T

15

S

L

O

T

18

S

L

O

T

8

2.5

G

S

L

O

T

9

C

X

L

16

S

L

O

T

10

C

X

L

16

S

L

O

T

11

2.5

G

S

L

O

T

12

2.5

G

S

L

O

T

13

1.25

G

S

L

O

T

14

S

A

P

S

L

O

T

5

6

2

2

M

S

L

O

T

6

6

2

2

M

S

L

O

T

7

2.5

G

11



System Overview

Cross-connect Unit

(High-order 120X120VC-4)

(Low-order 2016*2016 VC-12)

IU

IU

IU

IU

IU

IU

IU

IU

IU

IU

IU

IU

Timing

Unit

Auxiliary

interface unitSCC and OHP unit

Interface Unit Interface Unit

Management

interfaceAuxiliary interface

External sychronization

interface

12



Contents


Sub-rack

Service Boards

Auxiliary Parts

13



Circuit board

Boards can be classified into the following types:

PDH unit

SDH unit

Ethernet unit

Line, Cross-connect, Timing and SCC unit

Auxiliary unit: Engineering Orderwire

Auxiliary interface unit

Power unit

Fan unit

14



Circuit board

Limit factors for inserting boards:

Different access capabilities of different slots Example: SL16 in Slots 7,8

Processing boards can only be inserted in slots which have relation with Interface slots Example: PD1 only in Slots 6,7,8

Specific slots only for specific board Example: CXL only in Slots 9,10

Types of boards: 1. Processing 2. Interface

3. Processing + Interface

15



Appearance of boards

1. Processing board (PQ1) 2. Interface board (D75S) 3. Optical interface board

(SL16)

4. CXL1/4/16 5. SAP 6. Front panel

7. E1/T1 interface board 8. Optical interface

16



Contents

PDH Access Unit

SDH Access Unit

Ethernet Access Unit

Core Board

17



PDH Access Unit

Principle Diagram and Signal Flow

Alarms and Performance Events

Indicators

Relationship with Other Boards

Functions, Features and Applications

Course Contents

18



PDH Access Unit

Do you still remember these blocks?

Signal Flow

19



PDH Access Unit

Boards Processing Functions Interface Boards

PQM 63 X E1/T1 2 X D75S, 2 X D12B, 2 X D12S

PQ1 63 X E1 2 X D75S, 2 X D12B, 2 X D12S

PD1 32 X E1 1 X D75S, 1 X D12B, 1 X D12S

PL3 3 X E3/DS3 1 X C34

PD3 6 X E3/DS3 1 X D34

SPQ4 4 X E4/STM-1 1 X MU04

TSB8 8 Interface Switching & Bridging Board

TSB4 4 Interface Switching & Bridging Board

20



PDH Access Unit

21



Applications

Supports 63 both E1 and T1 signals

Provides 120 balanced E1

interface and 100 balanced T1

interface.

PQM

PQ1

Supports 63 E1 signals

Provides 75 unbalanced interface

and 120 balanced interface.

22



PDH Access Unit

Each PDH slot has

relation with two

interface slots.

Slots 5 has no relation with interface

slots, it is reserved for

E1/T1 processing

protection board (TPS).

Processing Interface

Board Slot Purpose Slot

PQ1

5 Protection NN

6

Working

1, 2

7 3, 4

12 15, 16

13 17, 18

23



Functions

Maintenance Function

Tributary software loopback

Online pseudo-random code check function

24



Major alarms

T- ALOS: No E1 signal received

Reasons:

Fault on E1 interface board

Fault on the E1 Cable

Fault on switch system

TU-AIS: Reasons:

1. Incorrect cross-

connect configuration

2. Fiber broken

TU-LOP: Reason:

Incorrect service configuration

Alarms

25



LP-RDI: Remote defect indication

Reasons:

Alarms such as TU-AIS and

TU-LOP are detected by the

remote terminal

LP-SLM , LP-TIM: Reasons:

V5 or J2 mismatch

Minor alarms

LP-REI: Remote error indication

Reasons:

Bit errors are detected by

the remote terminal

Alarms

26



Indicators

Indicator Color and status Description

Board

hardware

indicator-

STAT

On, green The board works normally.

On, red The board hardware fails, or the board

hardware is mismatched.

Off The board is not powered on.

Service

activation

indicator-

ACT

On, green

The service is activated. (In TPS

protection mode, the board is in

working status.)

Off

The service is not activated. (In TPS

protection mode, the board is in

protection status.)

27



Indicators


Board

software

indicator-

PROG

On, green

Upload of board software to FLASH or the

FPGA upload is normal, or the board software

initialization is normal.

On for 100ms and

off for 100ms

alternatively, green

Board software is being uploaded to FLASH or

FGPA

On for 300ms and

off for 300ms


The board software is initializing, and is in BIOS

boot stage.

On, red

The board software in FLASH or the FPGA

configuration is lost, resulting in upload and

initialization failure.

Off No power supply.

Service

alarm

indicator-

SRV

On, green Service is normal, no service alarm occurs.

On, red Critical or major alarm occurs to service.

On, yellow Minor or remote alarm occurs to service.

Off No service configured or no power supply.

28



PDH Access Unit

Relationship with other boards

With XCS unit:

Receives/sends VC4 signal from/to XCS unit board

Receives/sends clock signal

from/to XCS unit board

Communicates with

SCC unit via Lanswitch:

Reports its running information, Receives control command

29



PDH Access Unit

Processes 3 E3/DS3 signals

Interface board is C34S

75 unbalanced interface

PL3

PD3

Processes 6 E3/DS3 signals

Interface board is D34S

75 unbalanced interface

30



PDH Boards


Slot Purpose Slot

6

Working

1

7 3

12 15

13 17

Processing: PL3

Interface: C34S (SMB)

Processing: PD3

Interface: D34S (SMB)

31



PDH Access Unit

P_LOS: ( T_ALOS for PD1 ) No E3 signal received

Reasons:

1. Fault on E3 interface

board

2. Fault on the E3 Cable

3. Fault on switch system

P_AIS: (DN_E1_AIS and UP_E1_AIS for PD1) E3 signal alarm indication Reasons:

1. Transmission line faulty 2. Opposite NE outputs AIS signal.

B3_SD/B3_EXC: (BIP_SD/BIP_EXC for PD1)

Reasons:

BIP signal degraded or

excessive

Major Alarms

PL3/PD3 (only different points with E1 Processing

boards)

32



PDH Access Unit

Performance Events

Performance event Description of performance B3CNT B3 check bit error counts

FEBECNT remote check bit error counts

TUPJCHIGH TU pointer positive justification counts

TUPJCLOW TU pointer negative justification counts

33



PDH Access Unit

Processing: SPQ4

Interface: MU04

(SMB)


Slot Purpose Slot

6 Working

1

7 3

Boards Slot Position

34



Contents

PDH Access Unit

SDH Access Unit

Ethernet Access Unit

Core Board

35



SDH Access Unit

Boards Function

SL16 1 X STM-16

SLQ4 4 X STM-4

SLD4 2 X STM-4

SL4 1 X STM-4

SLQ1 4 X STM-1

SL1 1 X STM-1

SEP1 8 X STM-1 Processing

Interface Boards Function

EU08 8 X STM-1 Electrical

OU08 8 X STM-1 Optical

EU04 4 X STM-1 Electrical

36



SDH Access Unit

Boards Slot Position Board Slot

SL16

7, 8, 11, 12 SLQ4

SLD4 7, 8, 11, 12, 13

SL4

5, 6, 7, 8,

11, 12, 13 SLQ1

SL1

SEP1

(Depending on

interface used)

5, 6, 7, 8,

11, 12, 13

Interface

Board

Slot

EU08 1,3,

15,17 OU08

EU04

37



SDH Access Unit

38



SDH Access Unit

Course Contents

Principle Diagram and Signal Flow


Indicators

Relationship with Other Boards

Functions, Features and Applications

39



SDH Access Unit

Do you still remember these blocks?

Signal Flow

40



SDH Access Unit

Various optical modules for different distances

J1 Huawei SBS C2 according to the service

Software VC4 loopback

Applications

41



SDH Access Unit

Critical Alarms


R-LOS: Loss of signal

Reasons:

1. Light received is too dim

2. Receiver is failed

R-LOF: Loss of frame

Reasons:

1. Clock of the upstream

station is failed

2. To many bit errors

42



SDH Access Unit

AU-AIS: Reason:

Service is broken at

VC4 level

MS-AIS: Reason:

Caused by critical

alarm

AU-LOP: Reasons:

1. Hardware failure

2. Incorrect service

configuration

Major Alarms

43



SDH Access Unit

HP-TIM , HP-SLM: Reasons:

J1 mismatch

C2 mismatch

B1, B2, B3-EXC: Bit error excess

Reasons:

1. Optical path problem

2. Hardware failure

Minor Alarms

44



SDH Access Unit

MS-RDI: Multiplex Section Remote

End Defect Indication

Reasons:

Remote end detects MS-AIS

Minor Alarms

HP-RDI: High-order Path Remote End

Defect Indication

Reasons:

Remote end detects HP alarms

MS-REI: Multiplex Section Remote

End Error Indication

Reasons:

Remote end detects B2 errors

HP-REI: High-order Path Remote End

Error Indication

Reasons:

Remote end detects B3 errors

45



SDH Access Unit

Performance event

Description of performance

B1-BBE B1 check bit error counts



AUPJCHIGH AU pointer positive justification counts

AUPJCLOW AU pointer negative justification counts

Performance Events

46



SDH Access Unit

Indicator status description


Board

hardware

indicator-

STAT


On, red The board hardware fails.

On for 100ms and off

for 100ms alternatively,

red

The board hardware is

mismatched.

Off The board is not powered on,

or the service is not configured.

Service

activation

indicator-

ACT

On, green The service is activated.

Off The service is not activated.

47



SDH Access Unit

Indicator status description


Board

software

indicator-

PROG

On, green Upload of board software to FLASH or the

FPGA upload is normal, or the board

software initialization is normal.

On for 100ms and off for

100ms alternatively, green

Board software is being uploaded to

FLASH or FGPA



The board software is initializing, and is in

BIOS boot stage.

On, red The board software in FLASH or the FPGA




Service

alarm

indicator-

SRV

On, green Service is normal, no service alarm occurs.

On, red Critical or major alarm occurs to service.

On, yellow Minor or remote alarm occurs to service.

Off No service configured or no power supply.

48



SDH Access Unit

With SCC board

DCC and E1 ~ E2

Reports its running information,

Receives control command

With XCS board

VC4 service signal

Relationship with other board

49



SDH Access Unit

With line boards in dual slot

Passes through D1~D3, E1~E2(only when SCC is not function)

Passes through K1, K2(only when MSP exists)

which slots are dual slots? S

L

O

T

1

S

L

O

T

2

S

L

O

T

3

S

L

O

T

4

S

L

O

T

1

5

S

L

O

T

1

6

S

L

O

T

1

7

S

L

O

T

1

8

S

L

O

T

5

S

L

O

T

6

S

L

O

T

7

S

L

O

T

8

S

L

O

T

11

S

L

O

T

12

S

L

O

T

13

S

L

O

T

14

S

A

P

S

L

O

T

9

C

X

L

16

S

L

O

T

10

C

X

L

16

Fiber Routing

PIU

SLOT22

FAN

SLOT23

FAN

SLOT24

PIU

SLOT25

9-10 8-11 7-12 6-13

50



Contents

PDH Interface Unit

SDH Interface Unit

Ethernet Interface Unit

Core Board

51



Ethernet Unit

Unit name Board Full name Slot available

Ethernet

interface

unit

EGS2

2-port Gigabit

Ethernet optical

interface board

with Lanswitch 5, 6 ,7, 8

11, 12, 13

EFS4

4-port Fast

Ethernet

processing board

with Lanswitch

EFS0

Fast Ethernet

processing board

with Lanswitch

6, 7

12, 13

Interface Function Slot

ETF8 8 x 10/100M Ethernet

twisted pair interface

1,2,3,4,15,

16,17,18

52



Ethernet interface Unit

This section

will be

introduced in

another course

53



Contents

PDH Interface Unit

SDH Interface Unit

Ethernet Interface Unit

Core Board

54



Core board

Core board is integrated from

Line, cross-connect, Timing and SCC unit.

Board Full name Slot

CXL16 STM-16 Optical interface, System control, Cross-

connect (timing) board

9,10 CXL4 STM-4 Optical interface, System control, Cross-


CXL1 STM-1 Optical interface, System control, Cross-


55



Core board

STM-16 SDH

processing unit

Cross connect unit

System control and

communication unit

Timing unit

Front panel Backplane

Principle block diagram of CXL16

56



Core board

We will discuss about the four parts of the board: Cross-connect, Clock, SCC and Line unit .

Principle Diagram and Signal Flow Alarms and Performance Events Indicators Relationship with Other Boards Functions, Features and Applications

57



Core board

Cross Connection and Clock unit

Principle block diagram of cross connection and unit.

5G

lower-order

cross-connect

matrix

18.75G

higher-order

cross-connect

matrix

Timing

unit

Control and

communication unit

58



Core board

Cross Connection and Clock Unit

Functions and Features

Applications

Cross-connection:

VC12, VC3 and VC4

AU4-4C, AU4-8C, AU4-16C, and AU4-64C

Network Protection Control:

SNCP, MSP

Controlling TPS

Synchronous timing

1+1 hot backup mode

59



Core board Cross Connection Unit

Critical alarm


TEMP-OVER

Reason:

Operation temperature

over limit

PS

Reason:

Multiplex section protection

has been taking place

Major alarm

60



Core cross connection Unit


With SCC unit

Gets control commands

Sends running information

With access boards

Gets/sends VC4 signals

Gets SNCP information

61



Core board

Clock Unit

In master/slave mode,

master NE uses external clock or

internal

clock, and slave NEs trace the master NE

Synchronization modes (of system)

62



Core board

Clock Unit

Working modes of clock unit

Normal

Timing signals is ok

Holdover

Frequency information

stored, holding for 24h

Free-run

Internal clock

63



Core board

Clock Unit

Functions and Features

1. Generates system timing signals. Traces 2

channels of external timing signals and timing

signals from SDH interface.

2. Provides 2 channels of external timing signals.

The interfaces can be set as 2MHz or 2Mbit/s.

3. Processes SSM and clock ID.

64



Major alarms


EXTSYNLOS Reason:

Loss of external

synchronization source

LTI Reason:

Loss of all synchronization

sources

S1-SYN-CHANGE Reason:

Synchronization source

switches under S1 byte mode

Critical alarm

Core board

Clock Unit

65



SYNC-LOS Reasons:

Loss of synchronization

source of higher class

SYN-BAD Reasons:

Deterioration of the

synchronization source

Minor alarms

Core board

Clock Unit

66



Processing STM-1/4/16 signal

Various optical modules for different distances

J1 Huawei SBS C2 according to the service

Software VC4 loopback

In the term of applications and function, the line unit of

CXL1/4/16 is completely same with other SDH board.

For example: Line unit of CXL16=SL16

Core board

Line Unit

67



Core board

SCC unit

Functions:

SEMF:

Manages local equipment

MCF:

1. Communicates with other NEs by D1-D3

2. Communicates with NM through OAM interface

Issuing command

Collecting alarm and performance of other board

Providing orderwire phone and other data interfaces

communication

Supporting 1+1 hot backup protection

68



Software Function

BIOS

Host Software

Boots the system,

loads and upgrades host software

Self-checks the SCC hardware

DCC communication

Accomplishes real time supervision,

maintenance and management

Core board

SCC unit

69



Applications

ID is the only identification for an NE

ID is configured in range of 1 ~ 49136 with software

The default value of ID is 0 x BFF0 (49136)

SCC Board

70



MDB (like RAM in PC)

In dynamic RAM

Automatically saves the current data

If power fails, the data in MDB will be lost

DRDB (like HD in PC)

Automatically saves the successfully verified data

Saves the data in flash RAM

The battery provides power

FDB0, FDB1 (like floppy disk in PC)

Manually saves the data

Enduringly saves data and does not need battery

Four databases on the SCC:

MDB

DRDB

issued data

verify

Board

running

FDB0

FDB1

manual save

Installing

success

fail

Core board

SCC unit

71



Modem Connection

Core board

SCC unit

72



NE D

NE A

NE B

NE C

DCN

ROUTER

NM Terminal ROUTER

WAN Connection

Core board

SCC unit

73



What information will be reported to SCC

from an SDH board?

Why SCC board needs timing signals?


Core board

SCC unit

74



Indicators


Board

hardware

indicator -

STAT



On for 100ms and

off for 100ms

alternatively, red

The board hardware is

mismatched.

Off The board is not powered

on, or service is not

configured.

Service

activation

indicator of

cross-connect

unit - ACTX

On, green The cross-connect unit is in

active status.

Off The cross-connect unit is in

standby status.

75



Indicators


Service activation

indicator of system

control &

communication unit

ACTC

On, green The system control & communication unit is in

active status.

Off The system control & communication unit is in

standby status.

Board software

indicator - PROG


FPGA upload is normal, or the board software

initialization is normal.

On for 100ms and

off for 100ms


Board software is being uploaded to FLASH or

FGPA

On for 300ms and

off for 300ms



BIOS boot stage.





76



Core board


Service alarm

indicator of cross-

connect unit -

SRVX

On, green Service operates normally on the

cross-connect unit.

On, red Switching (e.g., TPS) occurs to the

service on the cross-connect unit.

Service alarm

indicator of line

unit - SRVL

On, green Service operates normally on the line

unit, and no service alarm occurs.

On, red Critical or major alarm occurs to the

line service.

On, yellow Minor or remote alarm occurs to the

line service.

Off The line service is not configured or

no power supply.

ALMC On, yellow Alarm is cut off permanently.

Off Alarm is normally provided.

Indicator description of CXL1, CXL4 and CXL16(3)

77



Contents


Sub-rack

Circuit Boards

Auxiliary Parts

78



Auxiliary parts

Unit name Board Full name Slot

System Auxiliary

Process SAP

System Auxiliary Process

board 14

Signal Extended

Interface SEI

Signal Extended Interface

board No

Power unit PIU Power interface unit 22, 25

Fan unit FAN Fan control unit 23, 24

Other functional unit AFB Backplane No

79



Auxiliary Parts

SAP

SEI

PIU

FAN

80



SAP Board

Functions of SAP: Lanswitch Function for the other boards ETH port for NMS connection COM port for debugging Processes E1, E2 & F1 bytes Processes S1 ~ S4 Processes subnet outgoing audio signal Monitors 2 X -48V power supply Powers Rack indicators Back up power supply 3.3V, 100W for each board

81



SAP board


Board

hardware

indicator -

STAT




100ms alternatively, red

The board hardware is mismatched.

Off The board is not power on.

Board

software

indicator -

PROG


FPGA upload is normal, or the board

software initialization is normal.



Board software is being uploaded to

FLASH or FGPA




BIOS boot stage.





82



SEI board

Front panel of SEI

Function: SEI provides the extent interfaces:

F & f interface

OAM interface

Orderwire interface

Clock input/output interface

F1 interface, etc.

83



SEI Board No. Name Interface No. Name Interface

1 ALMO1 For 4-channel Boolean outputs 2 ALMI1 For 4-channel Boolean inputs

3 ALMO2 For 4-channel Boolean output concatenation

4 ALMI2 For 4-channel Boolean inputs

5 LAMP1 For four cabinet alarm indicator outputs 6 S1 Serial 1

7 LAMP2 For four cabinet alarm indicator input concatenation

8 S2 Serial 2

9 OAM OAM 10 S3 Serial 3

11 F1 F1 12 S4 Serial 4

13 F & f F & f 14 V1 Subnet outgoing audio interface

15 PHONE Orderwire interface 16 V2 Subnet outgoing audio interface

17 CLK1 120 clock 18 Reserved

19 CLK2 120 clock 20 Reserved

21 CLKO1 75 clock output 1 22 CLKO2 75 clock output 2

23 CLKI1 75 clock input 1 24 CLKI2 75 clock input 2

84



PIU board

PIU is the power interface board in Slot 22 and 25

Functions: Power access Lightening protection and filtering

PIU front panel

85



FAN

Functions and features:

A single sub rack needs two fan boxes Fan control board Fan speed adjustment Fan failure detection Report failures and alarms

Protection:

1+1 hot backup

Alarm:

FAN_FAIL: fan failure

BDSTATUS: board is not on line

86



FAN

The appearance of Modular fan

Indicator description of the fan box

Indicator Color Description

Operation

status

indicator-

STATE

On,

green

The fan operates

normally.

On, red

The fan, fan power

board or FAN is

abnormal.

On,

yellow

The fan is turned off

due to low

temperature.

87



Summary


Sub-rack

Circuit Boards

Auxiliary Parts

88



Documents

OTA105102 OptiX OSN 2500 Hardware System Overview ISSUE1.0