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Network Architecture

Carrier Use of SIP Aparna Vemuri Voice Engineering Architect Level 3 Communications Eric Zimmerer Director of Product Management ipVerse Inc. Network Architecture. SS7 Network. Softswitch. SS7 Network. Softswitch. SIP BCP-T. MGCP. Circuit Switch. Circuit Switch. IP/ATM Network.

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Network Architecture

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  1. Carrier Use of SIPAparna Vemuri Voice Engineering ArchitectLevel 3 CommunicationsEric Zimmerer Director of Product ManagementipVerse Inc. Vemuri, Zimmerer,

  2. Network Architecture SS7 Network Softswitch SS7 Network Softswitch SIP BCP-T MGCP Circuit Switch Circuit Switch IP/ATM Network Home/SOHO Enterprise Trunking Gateway Trunking Gateway RTP Vemuri, Zimmerer,

  3. Network Architecture • SIP with additions = Softswitch to Softswitch • Open Standards (SIP BCP-T) • Isolate legacy signaling and Maintain backward compatibility • Enable scalable deployment of Softswitch network Vemuri, Zimmerer,

  4. SIP BCP-T • SIP: Session Initiation Protocol RFC 2543 • INFO Method • ISUP MIME Type • ISUP – SIP Mapping • NAP Architecture Vemuri, Zimmerer,

  5. SIP Session Initiation Protocol • IETF Standards track: RFC 2543 • Simple: Set up and tear down sessions • Wide acceptance • Stack commercially available Vemuri, Zimmerer,

  6. INFO method • Session initiation and teardown is not enough • Mid-Call events • More complex services enabled Vemuri, Zimmerer,

  7. ISUP MIME Type • Standard method of encapsulating legacy signaling • Simplifies Inter-working: • Local variant • Interconnect variant (LCD) • Specific target: do one thing well Vemuri, Zimmerer,

  8. Why not use ISUP? • Which ISUP? • Build Tomorrow’s network with Yesterday’s protocol? • SIP BCP-T isolates legacy signaling problems • New services develop faster with IP protocols Vemuri, Zimmerer,

  9. ISUP SIP mapping • Use SIP as a basic function or tool • Build applications that use SIP for call setup • Remember: SIP is not ISUP Vemuri, Zimmerer,

  10. NAP architecture • Interconnect Packet Networks • Circuit to packet origination • Packet to packet NAP • Packet to circuit termination • Security! Vemuri, Zimmerer,

  11. Network Access Point ipVerse Control Switch SS7 Network SS7 Network Softswitch SIP BCP-T MGCP NAP Circuit Switch Circuit Switch IP/ATM Network IP/ATM Network Home/SOHO Enterprise Trunking Gateway Trunking Gateway RTP Vemuri, Zimmerer,

  12. MGC to SIP end user device • Tremendous power in distributing intelligence • Software development at Network Edge • Homebrew PBX • Incorporation of Apps in the Network • Security! Vemuri, Zimmerer,

  13. Intelligence at the Edge SS7 Network ipVerse Control Switch SS7 Network Softswitch SIP BCP-T Circuit Switch Circuit Switch IP/ATM Network Home/SOHO Enterprise Trunking Gateway Trunking Gateway Vemuri, Zimmerer,

  14. Summary • SIP BCP-T: Open standard for Softswitch to Softswitch Communication • Isolate Legacy Signaling and Maintain Backward Compatibility • Build Scalable Softswitch Networks Vemuri, Zimmerer,

  15. Proven Interoperability SS7 Network ipVerse Control Switch SS7 Network Lucent Softswitch SIP BCP-T MGCP Circuit Switch Circuit Switch IP/ATM Network Home/SOHO Enterprise Trunking Gateway Trunking Gateway RTP Vemuri, Zimmerer,

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