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ITU-T Kaleidoscope 2010 Beyond the Internet? - Innovations for future networks and services

SIP Trunking The route to the new VoIP Services. ITU-T Kaleidoscope 2010 Beyond the Internet? - Innovations for future networks and services. Ivan Gaboli, Virgilio Puglia Italtel SpA Ivan.Gaboli@ italtel.it Virgilio.Puglia@italtel.it. SIP Business Trunking Architectural Model. NGN. SIP-I.

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ITU-T Kaleidoscope 2010 Beyond the Internet? - Innovations for future networks and services

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  1. SIP Trunking The route to the new VoIP Services ITU-T Kaleidoscope 2010Beyond the Internet? - Innovations for future networks and services Ivan Gaboli, Virgilio Puglia Italtel SpA Ivan.Gaboli@ italtel.it Virgilio.Puglia@italtel.it

  2. SIP Business Trunking Architectural Model NGN SIP-I Class 5 Softswitch AS AS ISUP PSTN/PLMN Media SIP Network Border Elements Public Domain Private Domain Customer Border Elements Customer Border Elements AS CN IP-PBX IP-PBX IP-PBX Medium/Large Enterprise Very Large Enterprise

  3. Network Elements • Public Domain • Applications Servers • Class 5 Softswitch • Media Gateways • Network Border Element • Private Domain • Corporate Border Element • Corporate Switching Node • Application servers • IP PBXs

  4. New world of services • Mobile Enterprise • Mobile office • User ubiquity • Any-Device, Any-Time, Any-Where • Unified communication & collaboration • Unified messaging • Telepresence • Document sharing • Virtual meeting rooms • Web 2.0 • Social Media Networks • Presence Federation • Co-opetition & Mass creativity

  5. Innovation Fields • Security • Secured channels • Data confidentiality • Network reliability • Governance • Simplified network management • Managed services • Easy customization • High performance • User autonomy (Self-Care portals) • Sustainability • Virtualization • Ecology

  6. Basic Call Setup Flow

  7. SIP Business Trunking – Signaling Model • ISDN Like • Signaling is decoupled by IP-PBX and Media is anchored by the IP-PBX using a Media Termination Function to emulate a PBX behaviour • Pure SIP • Signaling goes peer-to-peer between IP-PBXs • Hierarchic • Signaling between IP-PBXs is manipulated by a centralized harmonization function (HF) that can also anchor the media

  8. SIP Business Trunking – Signaling Model Class 5 Softswitch Class 5 Softswitch Class 5 Softswitch HF IP-PBX IP-PBX IP-PBX IP-PBX IP-PBX IP-PBX MTP MTP Pure SIP ISDN-Like Hierarchic

  9. SIP Business Trunking - User Plane Models • Fixed Media  RTP is anchored by IP-PBX • The core network it is not affected by media changing related to services invocation • IP-PBX needs a Media Termination Function to perform media anchoration • Variable Media  RTP is peer-to-peer • The core network must manage all the RTP negotiatons due to user services invocation • IP-PBX can implement various type of services and use several types of codecs

  10. Pure SIP Model – Service invocation

  11. Go to market approach • Full Jacket • Pre-packaged solution • Low customization • High reusability • Customer Tailored • High customer requirements compliancy • High customization possibility • High costs for deployment and certification

  12. Services Enabler Features To implement New Services the network must leverage the following capabilities: • Identity management & certification • Voice-Video codec/rating adaptation • Signaling harmonization • Security & Encryption capabilities • Management of specific peculiarities • Accounting capabilities

  13. Services Enabler Device IDAD  Inter-Domain Adaptation Device • Interdomain features harmonization • Signaling decoupling & normalization • Media Anchoring • Dynamic Audio/Video transcoding/Transrating • Session Admission Control • Fax adaptation • DTMF interworking • Encryption termination

  14. IDAD Media Anchoring Media Anchoring No Media Anchoring Class 5 Softswitch Class 5 Softswitch IDAD BE BE BE BE BE BE IP-PBX IP-PBX IP-PBX IP-PBX Enterprise A Enterprise B Enterprise A Enterprise B

  15. Interdomain features harmonization

  16. Network Semplification A measure of complexity can be assessed in proportion to the possible combination of all the devices involved. When a new domain is added, the complexity with IDAD is significantly minor than without:

  17. SIP Business Trunk Benefits • Fast provisioning • High performance & reliability • Governance • Cost savings • Replacement of local telephone connections with VoIP gateways • Reduction in IT operating costs • Growth • More efficient communications platforms • Improved services • Smart migration • Acceleration of communications processes for greater efficency • Support for community and semi-formal teams

  18. Lesson learned • Facts • SIP Trunking will permit creation of new services for VoIP business market • Standardization facilitates interoperability • Manufacturers extend standards with proprietary customization to provide new services IDAD is the trade-off between time to market and standardization.

  19. Back Up Slide

  20. Basic Call Setup Flow

  21. Pure SIP Model – Service invocation

  22. Hierarchic Model - Service Invocation

  23. ITU Standardization vs IDAD The strengthening of the standards is the main way to goforward for multi-vendor interoperable solutions, but it’s a must also consider the presence of several small/medium players that perform customization to provide services. IDAD is the trade-off between time to market and standardization.

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