8/20/2019 SDH Summary

1/1

 

ITU-T

Rec.

G.783

Speed Up Your SDH Analysis

SDH Maintenance Interactions

Generation Detection

LOS/LOF

RS-TIM

BIPErr.

HP-REI

LP-REI

HP-RDI

LP-RDI

 TU-AIS

 TU-LOP

LOM

HP-PLM

MS-AIS

MS-BIP Err.

MS-REI

MS-RDI

AU-AIS

AU-LOP

HP-UNEQ

HP-TIM

HP-BIPErr.

LP-UNEQ

LP-TIM

LP-BIP Err.

LP-PLM

RegeneratorSection

MultiplexSection

Higher-OrderPath

Lower-OrderPath

“1”

“1”

“1”

“1”

“1”

“1”

“1”

AIS

AIS

AIS

AIS

AIS

AIS

AIS(V5)

(V5)

(V5)

(V5)

(V5)

(J2)

(C2)

(H4)

(G1)

(G1)

(B3)

(J1)

(C2)

(K2)

(M1)

(B2)

(K2)

(B1)

(J0)

A no ma li es /D ef ec t s D et e ct io n c ri te r ia

LossofSignal Drop ofincoming optical power level causeshigh

biterror rate

LOS G.783

OutofFrameOOF A1,A2,incorrectfor ≥ 625 µs G.783

LossofFrameLOF G.783IfOOF persistsfor ≥ 3 ms(to be defined)

 

RS BIPError Regenerator Section BIP

Error (B1)

Mismatch ofthe recovered and computed BIP-8

coversthe whole STM-N frame

G.783

 

R S- TI M R egenera tor Sec ti on Tra ce

Identifier Mismatch

Mismatch ofthe accepted and expected Trace

Identifier in byte J0

G.783

G.783MS BIPError MultiplexSection BIPError (B2)

Mismatch ofthe recovered and computed N × BIP-24coversthe whole frame,except RSOH

G.783MS-AIS MultiplexSection AIS K2 (bits6,7, 8) = 111 for ≥ 3 frames

AU-AIS Administrative UnitAIS All “1” in the AU pointer bytesH1,H2

G.783HP-UNEQ H0 Path Unequipped C2 = “0” for ≥  5 frames

G.783HP-RDI H0 Path Remote Defect

IndicationG1 (bit5) = 1 for ≥ z frames (z = 3,5,or 10)

G.783H P- P LM H 0 P at h P ay lo a d L ab e l

Mismatch

Mismatch ofthe accepted and expected Payload

Label in byte C2 

G.783 TU-LOM LossofMu ltiframe H4 (bits7,8) multiframe not recovered for X m,

X = 1 - 5 ms

G.783 TU-AIS TributaryUnit AIS All “1” in the TU pointer bytesV1, V2

G.783 TU-LOP LossofP ointer 8 - 10 NDF enable,8 - 10 Invalid pointers

G.783LPBIPError LOPath BIPError Mismatch ofthe recovered and computed BIP-8 (B3)or BIP-2 (V5 bits1,2) coversentire VC-n

G.783LP-UNEQ LOPath Unequipped VC-3:C2 = “0” for ≥ 5 frames,VC-m (m = 2,11,12):V5 (bits5,6,7) = 000 for ≥  5multiframes

G.783L P -T IM L O Pa th T r a ce I d e n ti fi e r

Mismatch

Mismatch ofthe accepted and expected Trace

Identifier byte J1 (VC-3) or J2

G.783LP-RDI LOPath Remote Defect

Indication

VC-3:G1 (bit5) = 1 for ≥ z frames,VC-m (m = 2,11,12):

B5 (bit8) = 1 for ≥  zmultiframes(z= 3,5 or 10)

G.783L P- P LM L O Pa th P a yl oa d L a be l

Mismatch

Mismatch ofthe accepted and expected Payload Label

in byte C2 or V5 (bits5,6, 7)

G.707LP-REI LOPath Remote Error

Indication

VC-3:Number ofdetected B3 errorsin the sinkside

encoded in byte G1 (bits1,2, 3,4) ofthe source side,

VC-m (m = 2, 11,12):Ifone ore more BIP-2 errorsdetected

sinkside, byte V5 (bits3) = 1 on the source side

 

G.783H P -TI M H 0 P a th Tra ce Identi f ier

Mismatch

Mismatch ofthe accepted and expected Trace

Identifier in byte J1

G.783AU-LOP Administrative UnitLosso f 

Pointer

8 - 10 NDF enable,8 - 10 invalid pointer s

MS-REI MultiplexSection Remote

Error Indication

Number ofdetected B2 errorsin the sinkside encoded

in byte M1 ofthe source side

G.707

 

MS-RDI MultiplexSection Remote

Defect Indication

K2 (bits6,7, 8) = 110 for ≥ z fr ame s(z = 3 - 5) G.783

 

HPBIPError H0 Path BIPError (B3) Mismatch ofthe recovered and computed BIP-8

coversentire VC-n

G.783

 

HP-REI H0 Path Remote Error

Indication

Number ofdetected B3 errorsin the sinkside

encoded in byteG1 (bits1,2,3,4) of the source side

G.707

Note: Specifications, termsand conditionsare subject to changewithout notice.©2012JDS UniphaseCorporation. All rightsreserved. 30137179 504 0812 SDH.PO.OPT.TM.AE

 

 To learn more, visit www.jdsu.com/test

 T-BERD® /MTS-5800/6000A/8000

ONTFamily

 

Reg.MUX/DEMUX

PDH

MUX/DEMUX

PDHDXC

B1 B1 B1

B2 B2

B3/V5

Path

MUX section MUX section

Reg. section Reg. section Reg. section

AU-4

AU-Pointer

RegeneratorSectionOverhead

RSOH

MultiplexSectionOverhead

MSOH POHC-4

Datapayload

VC-4 260columns (bytes)

9 bytes 261 bytes

270columns (bytes)

9rows(bytes)

1

3

4

5

9

STM-1FrameStructure

STM-1SOH&POH 9bytes

MSOH

RSOH

AUPointer

HOPOH

LOPOH

9rows

K4

N2

J2

V5X

Media dependentbytes

Reserved for national use

Unscrambled bytes,therefore care

should be taken with their content

E1

D2H2

K1

D5

D8

D11

M1 E 2

D12

D9

D6

K2

H3D3

F1 X X

H1 H 1 H2 H 2 H3 H 3

B2 B2

X X

 B1

D1H1

B2

D4

D7

D10

S1

A1 A1 A1 A2 A2 A2 J0

F2

J1

N1

F3

H4

G1

C2

B3

K3

VC-4Concatenati on

Bitrates

Network Segments and Their Protection Schemes

4 9 b yt e s× 4 261 bytes×

MSOH

RSOH

AU-4Pointer

3

1

5

STM-4

VC-4POH

J1

B3

C2

G1

F2

H4

F3

K3

N1

    F    i   x   e     d    s

   t   u     f    f

    F    i   x   e     d    s

   t   u     f    f

    F    i   x   e     d    s

   t   u     f    f

C-4-4c

ATM cells The firstpointer indicatesJ1

All other pointersare setto

“concatenation indication”

4×261bytes

VC-4-4c

SDH

Designation

SONET

Designation

Data rate

Mb/s

S TM -0 S TS -1 /O C- 1

STM-1

STM-4

STM-16

STM-64

STM-256

STS-3/OC-3

OC-12

OC-48

OC-192

OC-768

51.84

155.52

622.08

2,488.32

9,953.28

39,813.12

139.264 E4

44.736 DS334.368 E3ATM

×4

×4

×4

×4

×1 ×1 38.338.560

×1×1 9.854.640

×1×1 2.396.160

×1

×1

×1

× 1

×3

×3

× 7

×7

× 3

×1 139.264

×1×1 599.040

6.312

2.048 E1

1.544 DS1

Point erprocessing

Multiplexing

Aligning

Mapping

×4

VC-4-16c

VC-4-4c

C-4-256c

C-4-64c

C-4-16c

C-4

C-4-4c

STM-0

STM-256

STM-64

STM-16

STM-1

STM-4

34.368

8.448

AUG256

AUG64

AUG4

AUG1

AU-3

AU-4-256c VC-4-256c

AU-4-64c

AU-4-16c

AU-4-4c

AU-4

 TUG-2

VC-3

 TU-11

 TU-12

 TU-2

VC-12

VC-2

C-11

C-12

C-2

C-3

VC-3 TU-3

VC-11

  TUG-3

 

kb/s

AUG16

VC-4-64c

VC-4

D1- D3: Datacommunicationchannels (DCC).A 192kb/s channel usedfromacentral locationforalarms,control,monitoringandadministrationfunctions.

RSOH Regenerator Section OverheadA1,A2: Indicates thebeginningoftheSTM-1(A1:11110110,A2:00101000).

 Theframe alignmentwordofanSTM-N(N ≤ 64)frameis composedof 3 × NA1bytes followed by 3 × NA2bytes. TheframealignmentwordofanSTM-256frameis composed64A1 bytes (byteNo.705to No.768)followedby 64A2bytes. A1and A2 bytes are always unscrambl ed. Theotherbytes arereservedforfutureinternational standardization.

 

 J0: Regeneratorsectiontrace.Usedtotransmita sectionaccess pointidentifiersothata section receivercanverify its continuedconnectiontothe intendedtransmitter.

Z0: Spare.Reservedforfutureinternational standardization.

B1: Regeneratorsectionerrormonitoring.TheBIP-8 is computedoverall bits of 

theprevious STM-Nframeafterscramblingandis placedin theB1byte ofthecurrentframebeforescrambling.

E1: Provides orderwirechannels forvoicecommunicationbetweenregenerators.

F1: Reservedforuserpurposes such as temporary data/voicechannel connectionsforspecial maintenancepurposes.

 

AU Pointers

H1,H2: Pointerbytes.Thepointercontainedin thesebytes designatesthelocationof theVC-nframe.Thelast 10 bits (b7tob16)carry thepointervalue(binary numberwitha rangeof0 to782).

H3: Pointeractionbyte.Is used forfrequency justification.Depending on thepointer value,this byteis usedto adjustthefill inputbuffers.It only carries validinformationinthe eventofnegativejustification,otherwiseitis notdefined.

MSOH Multiplex Section Overhead

B2: Multiplex sectionerrormonitoring.TheBIP-N * 24is usedto determineifa transmission errorhas occurredovera multiplex section.Itis computedoverall bits oftheprevious STM-N frameexceptforthefirst threerows andis placedintheB2 byteofthe currentframe.

K1,K2: Allocatedforautomatic protection switching (APS) signalingfortheprotectionofthe multiplex section. 

Linear APS messages Ring APS messages

K1byte Condition

b1-b4

b5-b8

1111

1110

1101

1100

10111010

1001

1000

01110110

0101

0100

00110010

0001

0000

Lockoutof protection

Forcedswitch

Signal fail highpriority

Signal fail lowpriority

Signal degradehigh prioritySignal degradelow priority

Unused

Manual switch

UnusedWait-to-restore

Unused

ExerciseUnused

Reserverequest

Donotrevert

Norequest

Selects channel usedby

APS messages

K2byte

Selects bridgedchannel used

Determines automaticprotectionswitch architecture

b1-b4

b5

b6-b8 000=Reservedforfutureuse001=Reservedforfutureuse010=Reservedforfutureuse

011=Reservedforfutureuse100=Reservedforfutureuse

101=Reservedforfutureuse110=MS-RDI

111=MS-AIS

K2byte Condition

b1-b4

b5

b6-b8

SourcenodeID

Pathcode:0=shortpath;1=longpath

000=Idle001=Bridged010=Bridgedandswitched

011=Reservedforfutureuse100=Reservedforfutureuse

101=Reservedforfutureuse110=MS-RDI

Condition

K1byte Condition

b1-b4

b5-b8

1111

1110

11011100

101110101001

1000

01110110

0101

0100

00110010

0001

0000

Lockoutof protection(span)

orsignal fail (protection)Forcedswitch(span)

Forcedswitch (ring)Signal fail (span)

Signal fail (ring)Signal degrade(protection)Signal degrade(span)

Signal degrade(ring)

Manual switch(span)Manual switch(ring)

Wait-to-restore

Exerciser(span)

Exerciser(ring)Reserverequest (span)

Reserverequest (ring)

Norequest

Destinationnode ID

M1: Allocatedforuseas amulitplex sectionREI.Conveys thecountof interleavedbitblocks detectedinerrorby B2.

D4- D12: Datacommunicationchannels (DCC).A 576kbps channel is usedfromacentral locationfor alarms,control monitoringandadministrationfunctions.

 

S1: Synchronizationstatus.Bits 5-8are usedtocarry thesynchronization

messages.Thefollowingis anassignmentofbit patterns tothefoursynchroni-zationlevels agreedtowithinITU-T.

0000

00010010

00110100

01010110

01111000

100110101011

11001101

11101111

S1byte

b5-b8SDHsychronization qualitylevel description

Quality unknown(existing synchronizationne twork)

ReservedRec.G.811

ReservedSSU-A

ReservedReserved

ReservedSSU-B

ReservedReserved(SEC)SDHEquipment Clock G.813

ReservedReserved

ReservedDonotuseforsynchronization

E2: Provides orderwirechannels for voicecommunicationbetweenmultiplexers.

ITU-T G.841protection switching protocol

ITU-T G.841protection switching protocol

LO-POH Lower-Order Path Overhead 

V5: Provides thefunctions oferrorchecking,signal label andpathstatus.

 J2: Lower-orderpathtraceidentifier.A 16-byteframeis transmittedsothatapathreceiving terminal canverify its continuedconnectiontotheintendedtransmitter.

BIP-2 REI RFI RDISignallabel

b1 b2 b3 b4 b5 b6 b7 b8

b5 Meaning

00

001

11

1

b6

00

110

01

1

b7

01

010

10

1

Unequippedor supervisory channelReserverd

AsynchronousBitsynchronousBytesynchronousExtendedsi gnal label Testsignal, O.181specific mappingVC-AIS

Frame# b7definition b8definition

737475

76

Reserved(default =“0”)ODIReserved(default =“0”)

Reserved(default =“0”)

 TC-RDIReserved(default =“0”)Reserved(default =“0”)

Reserved(default =“0”)

b7-b8 multiframestructure

Frame# b7- b8definition

1 - 89-12

13-1617-20

.

.

.65-68

69-742

73-76

Frameali gnmentsignal: 1111111111111110 TC-APIdbyte #1[1 C

1C

2C

3C

4C

5C

6C

7]

 TC-APIdbyte #2[0 XXXXXXX] TC-APIdbyte #3[0 XXXXXXX]

.

.

. TC-APIdbyte #15[0 XXXXXXX]

 TC-APIdbyte #16[0 XXXXXXX]

 TC-RDI,ODIand reserved

N2: Network operatorbyte.Allocatedto provideatandem connection monitoring(TCM)function.

BIP-2 OEI TC-APId,T C-RDIODI,reserved

b1 b2 b3 b4 b5 b6 b7 b8

N2bytestructure

 TC-REIIncomingAIS

“1”

VC-1/2Extended signallabelbytecoding

b12-b15

0000

0000

00000000

b16-b19

1001

1010

10111100

Hexcode

09

0A

0B0C

Interpretation

ATMmapping

Mappingof HDLC/PPP framedsignals

Mappingof HDLC/LAPS framedsignalsGFP mapping

K4: (b1)is allocatedtoanextendedsignal label.Thebit contains a32framemultiframe.Bitnumber:

b12-b19 b20 b21-b32

MFAS Extended signal label 0 Reservedbits

b1-b11

(b2)is allocatedfortheLO virtual concatenationstring.(b3-b4) areallocatedforhigher-order path APS.(b5-b7)arereservedforan optional use.If this optionisnotused,set these bits to“0000”or“1111andthereceiverwill ignorethecontent. Thebitcontains a32

K4(b5 - b7) coding and triggers

b5 b6 b7 Meaning Triggers

0

0

1

1

0

1

0

1

1

0

1

0

Noremotedef ect

E-RDIpayloadd efect

E-RDIserverdefect

E-RDIconnectivity defect

Noremotedefect

PLM

AIS,LOP

 TIM,UNEQ

(forVC-11/VC-12/VC-2)

HO-POH Higher-Order Path Overhead

  J1:  Thefirstbyte inthevirtual container.Its locationis indicatedby theAUpointer.A 64-byte freeformatstringora 16-byteframeis transmittedso thatapathreceivingterminal canverify its continuedconnectiontothe intendedtransmitter.

B3: Higher-orderpatherrormonitoring.TheBIP-8 is calculatedoverall bits ofthepreviousVC-n. Computedvalueis placedinthe B3byte. 

C2: Signal label.Indicates thecompositionorthemaintenancestatus oftheVC-n.

C2byte codingb1-b4

00000000

000000000000

00010001

00010001

00010001

0001

0001

00010001000111111111

b5-b8

00000001

001000110100

00100011

01000101

01100111

1000

1001

10101011110011101111

Hexcode

0001

020304

1213

1415

1617

18

19

1A1B1CFEFF

Interpretation

Unequippedor supervisory-unequippedReserved

 TUG structureLockedTU-nAsynchronous mappingof34368kbps or44736kbpsintocontainer3

 

Asynchronous mappingof 139364kbps intocontainer4ATMmapping

MANDQDB mappingFDDImapping

Mappingof HDLC/PPP framedsignalsMappingofsimpledatalink withSDHself-synchronization

scramblerMappingof HDLC/APS framedsignals

Mappingofsimpledatalink withSDHself-synchronization

scramblerMappingof 10G EthernetframesGFP mappingMappingof 10G fiberchannel frames Testsignal, O.181specific map pingVC-AIS

G1: Pathstatus.Conveys thepathstatus andperformanceback tothetrailterminationsourceas detectedby atrail terminationsink.

REI RDI Spare

b1 b2 b3 b4 b5 b6 b7 b8

G1(b5- b7)codingandinterpretation

b5-b7 Meaning Triggers

000001010011100101110111

Noremotedefec tNoremotedefec tE-RDIpayloadde fectNoremotedefec tRemotedefectE-RDIserverdefectE-RDIconnectivity defectRemotedefect

Noremotedef ectNoremotedef ectPLMNoremotedef ectAIS,LOP,TIM, UNEQAIS,LOP TIM,UNEQAIS,LOP,TIM, UNEQ

TC-RDI,ODIand reserved capacityStructureofframes#73-76oftheb7-b8multiframe

Frame# b7definition b8definition

73747576

Reserved(default=“0”)ODIReserved(default=“0”)Reserved(default=“0”)

 TC-RDIReserved(default=“0”)Reserved(default=“0”)Reserved(default=“0”)

F2,F3:  Pathuserchannels.Allocatedforusercommunicationpurposes betweenpathelements and arepayloaddependent.

H4: Positionandsequenceindicator.Provides amultiframeandsequenceindicatorforvirtual concatenationandageneralizedpositionindicatorforpayloads.

K3: (b1-b4) areallocatedforhigherorderpathAPS.(b5-b8) areallocatedfor futureuse.Without a defined value, the receiver willignore the content.

 N1: Network operatorbyte.Allocatedtoprovidea TCMfunction.

b7-b8 multiframestructureFrame# b7-b8definition

1 - 89-1213-1617-20...65-6869-7273-76

Framealignmentsignal:1111111111 TC-APIdbyte# 1[1 C

1C

2C

3C

4C

5C

6C

7]

 TC-APIdbyte# 2[0 XXXXXXX] TC-APIdbyte# 3[0 XXXXXXX]...

 TC-APIdbyte# 15[0XXXXXXX] TC-APIdbyte# 16[0XXXXXXX] TC-RDI,ODIandreserved111110

IEC OEI TC-APId, TC-RDIODI,reserved

b1 b2 b3 b4 b5 b6 b7 b8

N1bytestructure TC-REI

(forVC-4/VC-3)

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