SIGTRAN - An Introduction Tareque Hossain SS7 & SIGTRAN SS7 - - PowerPoint PPT Presentation

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Nov 04, 2022 750 likes •833 views

SIGTRAN - An Introduction Tareque Hossain SS7 & SIGTRAN SS7 Stands for Signaling System No. 7 A set of telephony signaling protocols which are used to set up public switched telephone network calls throughout the world

SLIDE 1

SIGTRAN - An Introduction

Tareque Hossain

SLIDE 2

SS7 & SIGTRAN

SS7

Stands for Signaling System No. 7
A set of telephony signaling protocols which are used to

set up public switched telephone network calls throughout the world SIGTRAN

Stands for Signaling Transport
An IETF task force that defined the specifications for a

protocol family to provide reliable datagram service and user layer adaptation (UA) for Signaling System 7 (SS7) & ISDN protocols over IP

SLIDE 3

Comparison of SS7 & IP Stack

INAP ¡ SCCP ¡ TCAP ¡ MTP3 ¡ MTP1 ¡ MTP2 ¡ Ethernet ¡ DLL ¡ IP ¡ TCP ¡ HTTP ¡

MTP: Message Transfer Part SCCP: Signalling Connection Control Part TCAP: Transaction Capabilities Application Part INAP: Intelligent Network Application Part

SLIDE 4

SIGTRAN Protocol Stack

TCAP ¡ IP ¡ SCTP ¡ M3UA ¡ M2UA ¡ M2PA ¡ SUA ¡ IUA ¡ MTP3 ¡ SCCP ¡ ISDN ¡

M3UA: MTP3 User Adaptation Layer M2PA: MTP2 User Peer-to-Peer Adaptation Layer SUA: SCCP User Adaptation Layer IUA: ISDN User Adaptation Layer SCTP: Stream Control Transmission Protocol

SLIDE 5

SCTP

A new transport protocol with time sensitive signaling

in mind

Flexible enough for general use SCTP can use multi-homed endpoints for redundancy

as opposed to TCP strictly connecting 2 endpoints

TCP is byte streamed, application is responsible for

structuring data. SCTP is message oriented, defining structured frames of data at transport layer

Provides multi-streaming capability: data is split into

multiple streams, each independently sequenced

SLIDE 6

SS7/ SIGTRAN Network Architecture

MGC ¡ MGC ¡ SG ¡ MG ¡ IP ¡Phone ¡ SCP ¡ IP ¡Network ¡ SG: Signaling Gateway MG: Media Gateway MGC: Media Gateway Controller SCP: Service Control Point STP: Service Transfer Point SSP: Service Switching Point SG ¡ MG ¡ SoftSwitch ¡ PSTN ¡Phone ¡ STP ¡ SSP ¡ SSP ¡ PSTN ¡Phone ¡ STP ¡

SLIDE 7

Future of SIGTRAN

Traffic increased by Local Number Portability & SMS

has pushed SS7 networks beyond capacity

SIGTRAN allows PSTN network to offload traffic to

IP networks

PSTN infrastructure is many times larger and far

reaching than IP networks

SIGTRAN will last as long as PSTN networks last Questions? Comments?