1. 1 TAC2000/2000.7 LABORATORY 117 SIP Peering in APAN Quincy Wu Email: solomon@ipv6.club.tw July 5, 2004

2. 2 TAC2000/2000.7 LABORATORY 117 Outline  Brief introduction to SIP comparing it to H.323  The initiatives occurring internationally  The initiatives occurring in APAN including peering and the proposed APAN Working Group  How to peers SIP services internationally based on the SIP.edu initiative  Goal: Each campus/organization builds a Registrar/Proxy Server Each campus/organization builds a Registrar/Proxy Server All SIP users can call each other with their SIP URI. All SIP users can call each other with their SIP URI.

3. 3 TAC2000/2000.7 LABORATORY 117 SIP History H.323SIP ITU-T protocol IETF protocol May 1995 Became “proposed standard” in March 1999. Study Group 16 SIP, SIPPING, SIMPLE WG Now V.5 Now RFC 3261

4. 4 TAC2000/2000.7 LABORATORY 117 ComponentsH.323SIP End Station Terminal SIP UA Network Server Gatekeeper Registrar, Redirect Server, Proxy Server MCU Conference Server PSTN Gateway

5. 5 TAC2000/2000.7 LABORATORY 117 Protocols H.323SIP SignalingRAS/Q.931SIP Capacity Negotiation H.245SDP CodecsAnyAny Real-time Communication RTP/RTCPRTP/RTCP

6. 6 TAC2000/2000.7 LABORATORY 117 Protocols (cont.) H.323SIP Message Encoding BinaryASCII Transport UDP and TCP Mostly TCP UDP and TCP Most UDP Data Conference T.120 Instant Message RFC 3428 Inter-Domain Routing Annex G DNS

7. 7 TAC2000/2000.7 LABORATORY 117 SIP is PBX/Centrex ready call waiting/multiple calls RFC 3261 hold RFC 3264 transfer RFC 3515/Replaces conference RFC 3261/callee caps message waiting message summary package call forward RFC 3261 call park RFC 3515/Replaces call pickup Replaces do not disturb RFC 3261 call blast RFC 3261 from Rohan Mahy’s VON Fall 2003 talk simultaneous ringing RFC 3261 basic shared lines dialog/reg. package barge-inJoin “ Take ” Replaces Shared-line “ privacy ” dialog package divert to admin RFC 3261 intercom URI convention auto attendant RFC 3261/2833 attendant console dialog package night service RFC 3261 centrex-style features boss/admin features attendant features

8. 8 TAC2000/2000.7 LABORATORY 117 Affordable SIP products  Finally, basic IP phones below $100  802.11 phones  video phones  speakerphones

9. 9 TAC2000/2000.7 LABORATORY 117 SIP deployments – landline  Consumer broadband: Vonage (90,000 lines), Packet8, … buckets of minutes or unlimited long- distance Vonage (90,000 lines), Packet8, … buckets of minutes or unlimited long- distance  SIP invisible, but it just works Time-Warner: “ Time Warner Cable, the second-largest US cable group, will [in 2004] roll out a national internet-based telephone service. ” Time-Warner: “ Time Warner Cable, the second-largest US cable group, will [in 2004] roll out a national internet-based telephone service. ” AT&T: “ The long-distance giant plans to offer VoIP-enabled services to 1 million consumers in the next two years, beginning with a roll-out in major cities across the U.S. in the first quarter of 2004. ” AT&T: “ The long-distance giant plans to offer VoIP-enabled services to 1 million consumers in the next two years, beginning with a roll-out in major cities across the U.S. in the first quarter of 2004. ” Verizon Verizon  MCI Advantage (for business)  Focused on hosted SIP services, rather than just SIP termination from Henning Schulzrinne’s International SIP 2004 talk

10. 10 TAC2000/2000.7 LABORATORY 117 SIP deployments – wireless  Usage for controlling new push-to-talk services not user-visible, but may emerge from hiding not user-visible, but may emerge from hiding first step to presence-enabled voice services first step to presence-enabled voice services  Sprint PCS Readylink service “ first commercial deployment of SIP by a wireless carrier ” “ first commercial deployment of SIP by a wireless carrier ”  3G (R5) services much slower in coming R4 – All IP network R4 – All IP network R5 – IMS (IP multimedia subsystem) requires SIP R5 – IMS (IP multimedia subsystem) requires SIP from Henning Schulzrinne’s International SIP 2004 talk

11. 11 TAC2000/2000.7 LABORATORY 117 Deployment example: SIP.edu  Deploy SIP and VoIP across Internet2 educational institutions  Transition E.164  SIP URIs  It is difficult to recall people ’ s phone numbers, but email addresses are easier. “+1-617-637-8562, come here. I need you!” (from slides by Ben Teitelbaum) A. G. Bell did not say:

12. 12 TAC2000/2000.7 LABORATORY 117 SIP Proxy DNS SIP-PBX Gateway PBX INVITE (sip:bob@bigu.edu) INVITE (sip:12345@gw.bigu.edu) DNS SRV query sip.udp.bigu.edu telephoneNumber where mail=”bob” PRI / CAS bigu.edu Campus Directory SIP User Agent Bob's Phone SIP.edu Architecture (Phase 1) © Ben Teitelbaum @ Internet2

13. 13 TAC2000/2000.7 LABORATORY 117 DNS INVITE (sip:bob@bigu.edu) DNS SRV query sip.udp.bigu.edu bigu.edu SIP User Agent SIP.edu Architecture (Phase 2) location DB If Bob has registered, ring his SIP phone; Else, call his extension through the PBX. REGISTER (Contact: 207.75.164.131) INVITE (sip:bob@207.75.164.131) SIP Proxy SIP Registrar Bob's SIP Phone © Ben Teitelbaum @ Internet2

14. 14 TAC2000/2000.7 LABORATORY 117 SIP.edu growth http://voip.internet2.edu/SIP.edu/ e.g., sip:hgs10@columbia.edu  +1 212 939 7042

15. 15 TAC2000/2000.7 LABORATORY 117 SIP Peering in APAN  What does each country need to do? Almost nothing special. SIP re-uses the DNS to finding the destination, so it does not not require centralized national directory gatekeeper as H.323. Almost nothing special. SIP re-uses the DNS to finding the destination, so it does not not require centralized national directory gatekeeper as H.323.  APAN VoIP Working Group  SIP tutorial & demo in future APAN meetings Build a SIP proxy server which supports RFC 3263 Build a SIP proxy server which supports RFC 3263 QoS between members’ VoIP network QoS between members’ VoIP network Advanced topics Advanced topics  RADIUS, NAT, H.323 integration, IPv6, ENUM, TRIP  Additional services Instant Message & Presence Instant Message & Presence Conference server Conference server PSTN gateways PSTN gateways

16. 16 TAC2000/2000.7 LABORATORY 117 Action Items  Liaise with APAN to set up WG  Refine the training materials for tutorial  Identify the local organization which will organize the next tutorial  Study advanced topics of SIP in next tutorial