61.sdh alarm & pm

5/12/2018 61.Sdh Alarm & Pm - slidepdf.com

http://slidepdf.com/reader/full/61sdh-alarm-pm 1/25

1

ALARM AND PERFORMANCE

MONITORING

SDH



2

Overhead Termination

LPT HPT MST RST RST MST HPT LPTRSOH

MSOH

VC-4 POH

VC-12, VC-3 POH

2M, 34M Unit STM-n Unit 2M, 34M Unit

LPT: Lower-order Path termination

HPT: High-order Path termination

MST: Multiplex Section Termination

RST: Regenerator Section Termination

STM-n Unit

STM-n Unit or

140M Unit

STM-n Unit or

140M Unit



3

Overhead Termination

STM-N unit

STM-N

TSI unit

RST MST HPT LPT

Crossconnect

Level

VC-12 or VC-32M or 34M

2M or 34M unit

STM-N unit

STM-N

TSI unit

RST MST HPT

Crossconnect

Level

VC-4140M

140M unit

STM-N unit

STM-N

TSI unit

RST MST HPT HPT MST RST

Crossconnect

Level

VC-12 or VC-3STM-N

STM-N unit

STM-N unit

STM-N

TSI unit

RST MST RST

Crossconnect

Level

VC-4STM-N

STM-N unit

MST



4

Performance Monitoring Point

Physical Layer

Section Layer

Adaptation

High/Low-order Path Termination



5

Optical Interface

LDBC : Laser Diode Bias Current

PDH Interface

CV-L : Code Rule ViolationES-L : Errored Second

SES-L : Severely Errored Second

External Clock Interface

CV- : Code Rule Violation

ES- : Errored Second)

SES- : Severely Errored Second

: L or P

Performance Monitoring-Physical Layer-



6

Regenerator (RS) and Multiplex (MS) SectionES- : Errored Second

SES- : Severely Errored Seconds

BBE- : Background Block Error

UAS- : Unavailable Seconds

OFS-

: Out of Frame Seconds (OOF) Multiplex Section Far-end

ES-MSFE : Errored Second

SES-MSFE : Severely Errored Seconds

BBE-MSFE : Background Block Error

UAS-MSFE : Unavailable Seconds

Multiplex Section

PSC : Protection Switching Count

PSD : Protection Switching Duration

Performance Monitoring-Section Layer-



7

AU-4 Pointer

PJE (positive) : Pointer Justification Event (positive)

PJE (negative) : Pointer Justification Event (negative)

Performance Monitoring-Adaptation-



8

High/Low-order Path (receiving direction)

ES- : Errored Second

SES- : Severely Errored Seconds

BBE-

: Background Block Error UAS- : Unavailable Seconds

High/Low-order Path (transmitting direction)

ES-FE : Errored Second

SES-FE : Severely Errored Seconds

BBE-FE : Background Block Error

UAS-FE : Unavailable Seconds

: HO or LO

Performance Monitoring-Path Termination-



9

Terms and Definitions(used by error performance)

EDC : Error Detection Code

Block : block

EB : Errored Block

Defect : defect

ES : Errored Second

SES : Severely Errored Second

BBE : Background Block Error CV : Code Violation

UAS : Unavailable Second



10

1

2

2348

1

1

1

1

2

2

2

2

3

3

3

3

4

4

4

4

5

5

5

5

6

6

6

6

7

7

7

7

8

8

8

82349

31

262

2

263

2348 2349

Gro up o f 8 bits

VC-4

261

B l o c k ( 1 8 7 9 2 b i t s / b l o c k )

BIP-8 of VC-4

B3

BIP-8 check sequence



11



Block : block

EB : Errored Block

Defect : defect

ES : Errored Second






12



Block : block

EB : Errored Block

Defect : defect

ES : Errored Second






13

Relation between ES, SES and BBE

B

l o

c

k

s

i n

1

s

e

c

.

p

e

r i

o

d

3 0 %

1 s e c .

E SS E S

EB} B B Enon E B



14



Block : block

EB : Errored Block

Defect : defect

ES : Errored Second






15

10 sec. 10 sec.< 10 sec.

Unavailability detected Availability detected

Unavailable period Available period

Error-fr ee second Sever ely e

rror ed sec

ondSES

Error ed sec

ond

ES

Unavailable Second



16

1 day

(Yester day)

Curr ent 1 day (Today)

data update : ever y 1 min.

0 : 00 0 : 00

TCA (Thr eshold Crossing Aler t)

1 day accumulation

32 per iods with zero suppr ession(32) (2) (1)

15 min.

hh : 15n hh : 15(n+1)Curr ent 15 min.

data update : ever y 1 min.

15 minute accumulation

TCA (Thr eshold Crossing Aler t)

Storage of PM data

timepast f utur e

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

item a

item b

item x

item y

item a

item b

item x

item y

memor yold new

Zero Suppression

all zero data with time stamp of occurrence

Zero Suppression

PM items of one f acility



17

Error Detection Point

LO Path

HO Path

MS

RS

RST

B2

MSTMST

B1

RST HPTHPT

BIP-8

BIP-24N

REI

REI

M1

G1

STM-16

STM-4

STM-1o

STM-1e

STM-16

STM-4

STM-1o

STM-1e

STM-16

STM-4

STM-1o

STM-16

STM-4

STM-1o

REI

B3

CMI

CV

2M/34M 2M/34M

BIP-2V5

V5

BIP-8

HDB3

BPV

LPT LPT

Generate

Terminate

140M or

STM-N

140M or

STM-N



18

Office Alarms

Miscellaneous Alarms and Controls

LCT and NMS

Housekeeping Alarms and Controls

Alarms and Remote Controls



19

Alarms Output Control

Output Function

Prompt Maintenance (PM) alarm Indicates prompt maintenance alarm initiated inthe local or remote NE.

Deferred Maintenance (DM) alarm Indicates deferred maintenance alarm initiated inthe local or remote NE.

Remote (RMT) alarm Indicates an alarm is initiated in the remote NE.User can select whether he contains it or not into alighting condition of DM lamp with a switch of lamp section.

Maintenance (MAINT) status Indicates the local or remote NE is inmaintenance status.

Alarm signal for bell (AB) Indicates the local NE is in alarm by astation alarm bell.

Alarm signal for lamp (AL) Indicates the local NE is in alarm by astation alarm.



20

Alarm States and Severity

CR - Critical

MJ - Major

MN - Minor

WA - Warning

RMT - Remote

IN - Indeterminate

NA - No Alarm (report status)



21

Remote Alarms-1

MUXStation A

REG

Station 1REG

Station 2

MUXStation B

MUXStation C

REG 1 REG 2

REG 1

REG 2

REG 1

REG 2

REG 1

REG 2

: Alar m occurr ance station

: Remote alar m detection station

: Station in which the alar m gener ated in REG 1 is detected as a r emote alar m

: Station in which the alar m gener ated in REG 2 is detected as a r emote alar m



22

Remote Alarm-2

ALM1 MJ

ALM2 MJ

ALM3 MJ

ALM4 MJ

ALM5 MN

FE_ MJ

MUX Station A MUX Station B

FE_ MN



23

NMS Network Structure

Bridge

LCT

INC

-100

Bridge

DCCr DCCr DCCr

DCCr

DCCr

DCCr

D C C r

L A

N

L A

N

Data channel ( D4~12 or other )

Area 1 Area 2

L A

N

AGENT

SC

AGENT

SC

AGENT

SC

AGENT

SC

AGENT

SC

AGENT

SC

AGENT

SC

AGENT

SC

AGENT

SC

AGENT

SC

AGENT

SC

AGENTSC

AGENT

SC

AGENT

SC

AGENT

SC



24

Remote Access by LCT



25

Housekeeping Alarms and Controls

Housekeeping Alarm Inputs

Housekeeping Control Outputs

61.sdh alarm & pm

Documents