PTCL Training & Development

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Presentation transcript:

PTCL Training & Development

SIGTRAN Protocols…. SIGTRAN: SIGnaling TRANsport to carry SS7 signals over the Internet PSTN’s signals are being carried over IP network after converting from SS7 to IP signals Underlying transport vehicle is SCTP (Signaling Control transmission Protocol) to carry SS7 over IP PSTN signals SS7 are transmitted to SG (Signaling Gateway) which in turns converts SS7 into SIGTRAN signals SIGTRAN signals are sent to a SoftSwitch or to next Signaling Gateway SG

SIGTRAN Protocols…… Basic function of SIGTRAN: To transport PSTN (SS7) signals over IP keeping the functions & requirements of PSTN Idea is to transport ISDN(Q.931, ISUP, SCCP etc) messages between IP nodes (SG, MGC, MGW) or to an IP-based database To provide signaling capability for Call Management and to provide media paths for IP real-time traffic Real-time traffic can be Voice, Music, video which needs instant transportation

SIGTRAN Protocols Model Common Signaling Transport SCTP Upper Layer protocols Adaptation Protocols Redefines new Transport service Common Signaling Transport SCTP Carries SS7 signals over IP runway Standard IP protocols The Real IP Standard Transport means Adaptation protocols-to make TCP/IP look like an upper layer protocols MTP3 (which are MTP1, MPT2, MTP3 all SS7 signals)

Integration of SS7 & IP protocols ISUP SCCP users, RANAP, TCAP etc SCCP MTP3 Q931 MTP2 M2UA M2PA M3UA IUA SUA 2904 3565 2905 9900 1401 SCTP IP

SIGTRAN benefits….. Ease of deployment: No need to distrupt SS7, future enhancements are transparent Better Efficiency: Using IP over SDH and IP over fiber can achieve much higher throughput Flexible architecture: IP signaling is flexible than TDM-based legacy networks Enhanced Services: Implementation of a core IP network facilitates a variety of solutions and value added services (VAS)

All Signaling Protocol scenario…. SIP-T/BICC SS SS SIGTRAN SIGTRAN H248 H.248 SG SG H323 /SIP SS7 SS7 E1 E1 TMG/UMG PSTN PSTN TMG/UMG AGW SIP Phone Phone B Phone A MAP phones GSM MSC * SIP-T: SIP for Telephone

Protocol abbreviation used…. ISUP—ISDN User Part SCTP– Stream Control transmission Protocol RANAP– Radio Network Access part TCAP– Transaction Capability part MTP1, 2 3 – Message Transfer Part 1, 2 ,3 M2UA, M3UA – Message 2 User Adaptation, Adaptation 3 IUA– ISDN User Adaptation SUA– SCCP User Adaptation SCCP– Signaling Connection Control Point