ITU-T Kaleidoscope 2010 Beyond the Internet? - Innovations for future networks and services SIP Trunking The route to the new VoIP Services Ivan Gaboli, Virgilio Puglia Italtel SpA Ivan.Gaboli@ italtel.it [email protected] Pune, India, 13 – 15 December 2010 SIP Business Trunking Architectural Model AS AS Class 5 Softswitch NGN SIP-I 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 Very Large Enterprise Medium/Large Enterprise Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 2 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 Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 3 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 Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 4 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 Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 5 Basic Call Setup Flow Private Domain Custom IP Phone ICT CSN IPPBX CSN Public Domain SIP SIP BE SIP BE H.248 SSW-C5 ISUP MGW PSTN Phone Control INVITE (no SDP) SETUP Ringing (180) RTP RTP RTP (Ring Back Tone) Answer Answer (200 OK) RTP RTP RTP Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 6 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 Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 7 SIP Business Trunking – Signaling Model Class 5 Softswitch Class 5 Softswitch Class 5 Softswitch HF IP-PBX IP-PBX MTP IP-PBX IP-PBX IP-PBX IP-PBX MTP ISDN-Like Pure SIP Hierarchic Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 8 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 Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 9 Pure SIP Model – Service invocation IP Phone IP-PBX SBC SSW SBC IP-PBX IP-Phone Trunking Gateway INVITE – 200 OK RTP (Voice) Hold / Media Channel Renegotiation RTP (Musid on Hole) Call Transfer (REFER) RTP Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 10 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 Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 11 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 Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 12 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 Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 13 IDAD Media Anchoring Media Anchoring No Media Anchoring Class 5 Softswitch Class 5 Softswitch IDAD BE BE BE BE IP-PBX IP-PBX Enterprise A BE Enterprise B BE IP-PBX IP-PBX Enterprise A Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services Enterprise B 14 Interdomain features harmonization IP Phone SBC IP-PBX INVITE SSW IP Phone B Trunking Gateway INVITE 200 OK 200 OK RTP IP Phone B IP-PBX SBC RTP IP Phone HOLD RTP Hold Tone RTP Hold Tone TRANSFER RTP Trunking Gateway RTP Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 15 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: Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 16 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 Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 17 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. Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 18 Back Up Slide Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 19 Basic Call Setup Flow Private Domain Custom Public Domain ICT CSN IPPBX IP Phone SIP SIP CSN BE SIP H.248 BE SSW-C5 ISUP MGW PSTN Skinny ICT 1. INVITE (no SDP) 2. 100 Trying 3. INVITE (no SDP) 4. 100 Trying 5. INVITE (no SDP) 6. 100 Trying 7. IAM 8. ACM 13. 180 ringing (g729, sendrcv) ICT 12. 180 ringing (g729, sendrcv) 9. CRCX (g711, g729, T.38) 10. OK (g729) 11. 180 ringing (g729, sendrcv) Skinny 14. PRACK (g729) 19. 200 OK ICT RTP 15. PRACK (g729) 18. 200 OK RTP 16. PRACK (g729) 17. 200 OK RTP (Ring Back Tone) 15. ANM 20. 200 OK (g729) 21. 200 OK (g729) ICT 22. 200 OK (g729) Skinny 23. ACK (g729) RTP 24. ACK (g729) RTP 25. ACK (g729) RTP Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 20 Pure SIP Model – Service invocation Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 21 Hierarchic Model - Service Invocation Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 22 ITU Standardization vs IDAD The strengthening of the standards is the main way to go forward 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. Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 23