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

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

  1. SIGTRAN - An Introduction Tareque Hossain

  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

  3. Comparison of SS7 & IP Stack INAP ¡ HTTP ¡ TCAP ¡ TCP ¡ SCCP ¡ IP ¡ MTP3 ¡ DLL ¡ MTP2 ¡ Ethernet ¡ MTP1 ¡ MTP : Message Transfer Part SCCP : Signalling Connection Control Part TCAP : Transaction Capabilities Application Part INAP : Intelligent Network Application Part

  4. SIGTRAN Protocol Stack TCAP ¡ SCCP ¡ MTP3 ¡ ISDN ¡ M3UA ¡ M2UA ¡ M2PA ¡ SUA ¡ IUA ¡ SCTP ¡ IP ¡ 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

  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

  6. SS7/ SIGTRAN Network Architecture PSTN ¡Phone ¡ MGC ¡ MGC ¡ SSP ¡ IP ¡Network ¡ SG ¡ STP ¡ STP ¡ SG ¡ IP ¡Phone ¡ SCP ¡ SSP ¡ MG ¡ MG ¡ SoftSwitch ¡ PSTN ¡Phone ¡ SG: Signaling Gateway MGC: Media Gateway Controller STP: Service Transfer Point MG: Media Gateway SCP: Service Control Point SSP: Service Switching Point

  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?

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