SCCPSignaling Connection Control Part

UsersSCCPSignaling Connection Control Part

Connection OrientedConnection LessMTP

Connection LessSCCP

Connection Oriented

MSC/VLRBSCBSSAPBase Station

System Application PartConnection OrientedConnection Less

STPGTGlobal Title

SCCPMTPGT

MTPSCCPNSPNetwork Service Part

OSINSPNetwork LayerOSI

Non Circuit Related Signaling-Circuit Related Signaling

Speech

DataMTP

UsersMTP

HLRUpdateMSC/VLRHLR

SCCP

Circuit-RelatedNon-Circuit-Related

Signaling Connection

SCCPMTPC.OConnection

OrientedISUPISDN User PartC.O

MTPC.L

C.L (Connection Less)

C.O (Connection Oreiented)

C.O

Logical Connection

TimeSlot

SCCP User

SCCPC.RConnection Request

SCCPMTPSCCP

IndicationSCCP User

SCCP UserSCCP User

SCCP UserResponseSCCP

C.RMTPSCCP

ResponseSCCP

CCConnection ConfirmationSCCP User

CCCREEConnection Refused

O&MLeased Line

Service User

C.OC.L

Real TimeC.O

.

SCCPC.LC.O

Protocol Classes

SCCP

C.LC.O

Abbreviation

UnitdataUDT

Data Form

DT

Data Form

DT

Extended Unitdata XUDT

SCCP UserNSDUs

Network Service Data UnitsSCCPNSDUs

C.LUDT (Unit Data)XUDT (Extended Unit

Data)

Protocol Class (Basic C.L)

(NSDUs)SCCPSCCP

Protocol Class (Sequenced C.L)

NSDUs

Protocol Class (Basic C.O)

NSDUs

MTP

Protocol Class (Flow Contorol)

SCCP

Primitive

C.OResponse

RequestIndicationConfirmMTPSCCP

SCCPSCCP UserPrimitive

PrimitiveUserPrimitive

Layer Idenifier

Generic Name

ConnectUnit Data

Specific Name

ReponseRequestIndicationConfirm

Connect

ParameterSpecific NameGeneric NameLayer Identifier

Parameter

SCCPSCCP functional Structure

SCCP

SCCP Control Oriented Part (SCOP)

SCCP Connection Less Part (SCLP)

SCCP Management and Operation Part (SCMOP)

SCCP

SCLP

SCCP Connection Less Control (SCLC)

SCCP Connection Less Routing (SCLR)

SCLC

UDTXUDTSCLR

UserMTP

SCLRMTP

SCOP

SCCP Connection Oriented Control (SCOC)

SCCP Connection Oriented Routing (SCOR)

SCOC

SCOR

SCMOP

UpdateSCCPSCMOP

SCCP

SCCPSCCPSCCP

SCCP

C.L (Connection Less)

,

UDT (Unitdata)

,

XUDT (Extended Unitdata)

,

UDTS (Unitdata Service)

,

XUDTS (Extended Unitdata Service)

C.L (Connection Less)(SCCP User)

UDTXUDT

SCLC

UDTXUDT

C.o (Connection Oriented)

CR (Connection Request)

CC (Connection Confirm)

CREF (Connection Refused)

RLSD (Released)

RLC (Release Complete)

DT (Data Form )

ERR (Protocol Data Unit Error)

IT (Inactivity Test)

CRCCCREFDTI

IT

ERR

RLSDRLCRLSD

LRN (Local Refrence Number)

C.O

C.O

LRN

CRCC

ACOCB

ACRBACR

BCCBB

BCCRC

ABLRN

CCRCCBCBC

BCCC

BCCAAB

AB

CRCCLRNABBCA

BBCACC.O

LRN

AB B

CCC

BCB

BAA

BBAC

ABB

SCCP

SCCP

SLRSource Local NumberDLRDestination Local number

LRNLocal Reference Number

LRN

DLRSLR

Called party address

SPSCCPSCCP UserGT

(Global title)SPC (signaling point code)SSN (subsystem)

Calling party address

SPSCCPSCCP User

Called party addressCalling party addressGT (Global title)SPC (signaling

point code)SSN (subsystem number)

Data

DataSCCP

Realease

Segmentation

UDT

XUDT

Error

LRN

SCCP

SCCP

Routing table

MTPDPCOPCSLS

SCCPSCCP

Message type

Message type

Parameter

User Dataoptional

mandatory

LRNC.O

Called party address

SCCPUser DataSCCP User

SCCP

Protocol Class

SCCPC.LC.O

Pointer

PointerPointer

Pointer

Called Party Address

length of address (LA)address indicator (AI)

length of address (LA)Called Party

Address

Address Indicator (AI)

(Address indicator) AI

AddressAIAddressGTSPCSSN

Routing indicatorGTSPC

GTGTGT

SSN, SPC

Address

SSN (Subsystem Number)

SCCPISUPHLRMSC

SSN

SSN not known / not used

SCCP management

ISUP

OMAP

MAP

HLR

VLR

MSC, GMSC

EIR

AUC

SC

BSC (BSSAP), ANSI signaling

BSC (BSSAP),CCIT signaling

GT (Global Title)

GTSCCPSCCP

GTMTPDPC

GT

NP (Numbering plan)

Example Numbering PlanCode

MSISDN. GT addressISDN / Telephony Numbering Plan (E.

/

E. )

MSI, MGT (Location Updating).

ISDN / Mobile Numbering Plan (E. )

AI (Address Information)

NP (Numbering Plan)

AI

MSC/VLR

NA (Nature of address)

AI

NA (Nature of Address)Code

National

International

TT (Translation Type)

GTTT

GTGTTT

SPC (Signaling point code)

NodeSPCMTPDPC

OPC

SCCP

MTPMTPSIF(Signal Unit)

SISCCPMSU

SL (signaling link)Node

(Global Title Translation (GTT)) GT

GTSSGTT

GTTAddress field

ResultSCCP

SPC (Signaling Point Code)

GTTDPC

SSN (SubSystem Number)/SPC

GT (Global Title)

GTSCCPGTTTNANP

GTT

SSN

SCCPSSN

GTT

GT

GT Type

GT Type

GT Type

GT Type

GT supplements

NA (Nature of Address)

***TT (Translation Type)

* * NP (Numbering Plan)

SCCP

SCCP

CRMSCBSC

SCCPMTP

Message TypeCR

LRN

Protocol Class

Called party address

GT

SPC

BSSAP

Pointer

SCCP

SCCPSCCPCLCalling Party AddressCalled

Party AddressUDTXUDTCO

SCCP(CR)

Called Party AddressCalling Party

AddressCalled Party AddressLRN

C.O

SCCP UserN-CONNECT Request PrimitiveSCCP

SCCPCR

SCCPCRCCSCCP

LRN

SCCP User

DT

N-DISCONNECT Request PrimitiveSCCP UserSCCP

SCCPRLSD (Released)SCCP

SCCP

SCCPRLSDRLC (Released Complete)SCCP

Intermediate Node

SCCP UserSCCPSCCP SCCP SCCP User

N-Connect

CR CR Request

N-Connect

Indication

N-Connect

Response CC CC

N-Connect

Confirm

N-Data

DT DT DT Request

N-Data

Indication N-Discon

RLSDRLSDRequest

N-Discon

Indication RLC RLC

Destination node Originating node

CL

SCCP User

CRCCSCCP UserN-UNITDATA Request

PrimitiveSCCPSCCPCL

SCCPUDT (UnitData)

SCCPN-UNITDATA Indication PrimitiveSCCP User

Intermediate Node

SCCP UserSCCPSCCP SCCP SCCP User

N-Unit Data

UDT UDT Request

N-Unit Data calling/called

Indication address

N-Unit Data

Request

UDT UDT

calling/calledN-Unit Data

party address Indication

Destination nodeOriginating node

www.protocols.com

www.squire-technologies.co.uk/SCCP

www.techfest.com/networking/wan/ss .htm

www.openss .org/sccp.html

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