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SIP - Introduction to SIP Protocol
The document covers the Session Initiation Protocol (SIP) and its role in modern telecommunications, detailing its evolution from analog to digital networks and the emergence of IP as a mediator. It includes explanations of SIP's functionalities, base flow, and content services, outlining how SIP facilitates communication through various protocols and devices. The document emphasizes the significance of IMS (IP Multimedia Subsystem) as an architectural framework for delivering integrated multimedia services over IP networks.
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SIP - Introduction to SIP Protocol
- 1. SIP – SessionInitiation Protocol March, 2014 LP Voice Team More than meets the
- 2. 1 Yossi Maimon -LivePerson VOIP Technical Leader Ofer Cohen - LivePerson VOIP Group Leader More than 15 years of experience in telecom networks. Especially with conversions systems. About the Presenters FMC, IMS, IFC, IPT, CTI, GW, IN, VSSF, SIPT, MSC GW, SIP Tunneling over Https, Media Transcoding, SIM-IP Softphone
- 3. 1Chapter headings Part 11. Telecom in a Nutshell 2. How IP became a common mediator network 3. One word on IMS Part 2 4. SIP Base flow Part 3 5. SIP Content services. Part 4 6. IMS
- 4. 1Chapter headings Part 11. Telecom in a Nutshell 2. How IP became a common mediator network 3. One word on IMS Part 2 4. SIP Base flow Part 3 5. SIP Content services. Part 4 6. IMS
- 5. 1The IP effectin telecom networks IP
- 6. 1Telecom in aNutshell • Analog Networks (PSTN) • Digital networks • Mobile • Phone over IP
- 7. 1Telecom in aNutshell • Analog Networks (PSTN) Analog, CS, PSTN as ―telephony Internet‖, Evolution. • Digital networks • Mobile • Phone over IP
- 8. 1Telecom in aNutshell • Analog Networks (PSTN) • Digital networks ISDN – Integrated Services Digital Network. IN services. GW to PSTN. • Mobile • Phone over IP
- 9. 1Telecom in aNutshell • Analog Networks (PSTN) • Digital networks ISDN – Integrated Services Digital Network. IN services. GW to PSTN. • Mobile • Phone over IP
- 10. 1Telecom in aNutshell • Analog Networks (PSTN) • Digital networks ISDN – Integrated Services Digital Network. IN services. GW to PSTN. • Mobile • Phone over IP
- 11. 1Telecom in aNutshell • Analog Networks (PSTN) • Digital networks ISDN – Integrated Services Digital Network. IN services. GW to PSTN. • Mobile • Phone over IP
- 12. 1Telecom in aNutshell • Analog Networks (PSTN) • Digital networks ISDN – Integrated Services Digital Network. IN services. GW to PSTN. • Mobile • Phone over IP
- 13. 1Telecom in aNutshell • Analog Networks (PSTN) • Digital networks ISDN – Integrated Services Digital Network. IN services. GW to PSTN. • Mobile • Phone over IP
- 14. 1Telecom in aNutshell • Analog Networks (PSTN) • Digital networks ISDN – Integrated Services Digital Network. IN services. GW to PSTN. • Mobile • Phone over IP
- 15. 1Telecom in aNutshell • Analog Networks (PSTN) • Digital networks ISDN – Integrated Services Digital Network. IN services. GW to PSTN. • Mobile • Phone over IP
- 16. 1Telecom in aNutshell • Analog Networks (PSTN) • Digital networks ISDN – Integrated Services Digital Network. IN services. GW to PSTN. • Mobile • Phone over IP
- 17. 1Telecom in aNutshell • Analog Networks (PSTN) • Digital networks ISDN – Integrated Services Digital Network. IN services. GW to PSTN. • Mobile • Phone over IP Analog Network
- 18. 1Telecom in aNutshell • Analog Networks (PSTN) • Digital networks • Mobile Just the endpoint is ―mobile‖. Analog, GSM, 3G Integrated into SS7, use ISDN as GW. 4G • Phone over IP Digital Analog IP
- 19. 1Telecom in aNutshell • Analog Networks (PSTN) • Digital networks • Mobile Just the endpoint is ―mobile‖. Analog, GSM, 3G Integrated into SS7, use ISDN as GW. 4G • Phone over IP Digital Analog IP
- 20. 1Telecom in aNutshell • Analog Networks (PSTN) • Digital networks • Mobile • Phone over IP LAN LAN IP
- 21. 1Telecom in aNutshell • Analog Networks (PSTN) • Digital networks • Mobile • Phone over IP H.323, Skinny, H.324m, Skype, SIP LAN LAN IP
- 22. 1 IP as amediator LAN LAN IP Telecom in a Nutshell
- 23. 1 IP as amediator LAN LAN IP Telecom in a Nutshell
- 24. 1 IP as amediator LAN LAN IP Telecom in a Nutshell
- 25. 1Chapter headings: Part 11. Telecom in a Nutshell 2. How IP became a common mediator network 3. One word on IMS Part 2 4. SIP Base flow Part 3 5. SIP Content services. Part 4 6. IMS
- 26. 1How IP becamea mediator network ISDN
- 27. 1 ISDN ISDN How IP becamea mediator network ISDN IP
- 28. 1 ISDN ISDN How IP becamea mediator network ISDN ISDN IP
- 29. 1 ISDN ISDN How IP becamea mediator network ISDN ISDN IP IP IP
- 30. 1 ISDN ISDN How IP becamea mediator network ISDN ISDN IP IP IP
- 31. 1 ISDN ISDN How IP becamea mediator network ISDN ISDN LTE / IMS IP IP IP
- 32. 1How IP becamea common mediator network • Simple Integration with IP networks, decrease communication cost. • Phone became a content device and not just phone-call device. • One integration IP Service Digital Digital IP IP
- 33. 1 • Simple /HTTP style. • Ability to capsulate foreign protocols. • The dominate architecture for internet integration are using* SIP. * IMS: SIP based FMC: Major functions Soft Switch : Common implementations. Why SIP and not other IP Protocols
- 34. 1Chapter headings: Part 11. Telecom in a Nutshell 2. How IP became a common mediator network 3. One word on IMS Part 2 4. SIP Base flow Part 3 5. SIP Content services. Part 4 6. IMS
- 35. 1One word onIMS IMS - IP Multimedia Subsystem
- 36. 1One word onIMS IMS Services scheduler CSCFHSS ServiceServiceServiceService
- 37. 1One word onIMS IMS Re-router CSCFHSS OUT ServiceServiceServiceService
- 38. 1One word onIMS IMS Adapt networks according their abilities. CSCFHSS SIP NON SIP OUT ServiceServiceServiceService
- 39. 1Chapter headings Part 11. Telecom in a Nutshell 2. How IP became a common mediator network 3. One word on IMS Part 2 4. SIP Base flow Part 3 5. SIP Content services. Part 4 6. IMS
- 40. 1SIP Protocol Communication session= Signaling + Media Signaling: initiating, Capability exchange, Media: The content itself – voice, video, message, files, control events, … Signaling: modifying, terminating a session.
- 41. 1SIP Protocol The SIPDefine IP Signaling Session. The session may initiated by: • IP endpoint (SIP Phone, Click-To-Call, etc.) • GW/Soft-Switch/FMC (Legacy to IP). • Invoked as a mid-service. IP Service Digital Digital IP IP
- 42. 1SIP Protocol SIP messageis HTTP like: text base. request response. head line, headers, body. Example of Network elements • User Agent – UAC, UAS • Proxy server • Registrar • Redirect server Example of SIP Request: • Invite • Bye • Cancel • Register
- 43. 1SIP Protocol SIP Response: •1xx—Provisional Responses • 2xx—Successful Responses • 3xx—Redirection Responses • 4xx—Client Failure Responses • 5xx—Server Failure Responses • 6xx—Global Failure Responses Example for responses for Invite request: 180 Ringing 200 OK 302 Moved Temporarily 404 Not Found 407 Proxy Authentication Required 503 Service Unavailable
- 44. 1SIP Protocol The Bodymay contains any type. SDP: Capability declaration - voice, video, data, application, control, (text, message). XML / TXT. MULTI: Usually in order to cover foreign protocols. INVITE sip:[email protected] SIP/2.0 Call-ID: [email protected] CSeq: 1 INVITE From: <sip:[email protected]>;tag=4882894371614 To: <sip:[email protected]> Content-Type: application/sdp Contact: <sip:[email protected];transport=udp> Via: SIP/2.0/UDP 1.2.3.4:5060;branch=z9hG4bK49ddba9a2ba8c7ec Content-Length: 126 v=0 o=app-name 0 0 IN IP4 192.1.2.3 s=SIP-Call c=IN IP4 192.1.2.3 m=audio 27174 RTP/AVP 0 18 a=rtpmap:0 PCMU/8000 a=rtpmap:18 g729a/8000 a=fmtp:18 annexb=yes
- 45. 1Native basic flowto basic flow Register BOB ALICE BOB 200 ok Invite BOB 200 ok ACK BYE 200 ok Registrar
- 46. 1SIP INVITE INVITE sip:[email protected]SIP/2.0 Via: SIP/2.0/UDP alice.lp.com;branch=z9hG4bK776asdhds To: Bob <sip:[email protected]> From: Alice <sip:[email protected]>;tag=1928301774 Call-ID: [email protected] CSeq: 1 INVITE Contact: <sip:[email protected]> Content-Type: application/sdp Content-Length: 142 v=0 o=Alice 2890844526 2890844526 IN IP4 host.atlanta.example.com c=IN IP4 alice.example.com m=message 7394 TLS/MSRP * a=accept-types:text/plain a=path:msrp://alice.example.com:7394/2s93i9ek2a;tcp
- 47. 1SIP INVITE –VIA &Contact headers INVITE sip:[email protected] SIP/2.0 Via: SIP/2.0/UDP alice.lp.com;branch=z9hG4bK776asdhds To: Bob <sip:[email protected]> From: Alice <sip:[email protected]>;tag=1928301774 Call-ID: [email protected] CSeq: 1 INVITE Contact: <sip:[email protected]> Content-Type: application/sdp Content-Length: 142 v=0 o=Alice 2890844526 2890844526 IN IP4 host.atlanta.example.com c=IN IP4 alice.example.com m=message 7394 TLS/MSRP * a=accept-types:text/plain a=path:msrp://alice.example.com:7394/2s93i9ek2a;tcp
- 48. 1SIP INVITE -BODY INVITE sip:[email protected] SIP/2.0 Via: SIP/2.0/UDP alice.lp.com;branch=z9hG4bK776asdhds To: Bob <sip:[email protected]> From: Alice <sip:[email protected]>;tag=1928301774 Call-ID: [email protected] CSeq: 1 INVITE Contact: <sip:[email protected]> Content-Type: application/sdp Content-Length: 142 v=0 o=Alice 2890844526 2890844526 IN IP4 host.atlanta.example.com c=IN IP4 alice.example.com m=message 7394 TLS/MSRP * a=accept-types:text/plain a=path:msrp://alice.example.com:7394/2s93i9ek2a;tcp
- 49. 1Alice Registers toLP1, BOB to LP2 Register 200 ok 200 ok RegisterLP1.COM LP2.COM ALICE BOB
- 50. 1Alice calls BOBand gets Music on Hold ALICE BOB LP2.COM IVR LP1.COM redirect server Invite BOB + SDP Alice 200 ok + SDP IVR
- 51. 1redirect the callto LP2 LP2.COM IVR LP1.COM redirect server ALICE BOB
- 52. 1LP1 routes thecall to BOB via LP2 ALICE BOB IVR Invite BOB + Alice SDP 200 ok with BOB SDP Invite BOB + LP2 SDP 200 ok LP2 SDP LP2.COMLP1.COM redirect server
- 53. 1Connect the mediabetween Alice and BOB through LP2 IVR (re) Invite + LP2 SDP 200 ok redirect server ALICE BOB LP2.COMLP1.COM
- 54.
- 55. 1 LP2.COM IVR LP1.COM redirect server ALICE BOB Connect themedia between Alice and BOB through LP2
- 56. 1Chapter headings Part 11. Telecom in a Nutshell 2. How IP became a common mediator network 3. One word on IMS Part 2 4. SIP Base flow Part 3 5. SIP Content services. Part 4 6. IMS
- 57. 1SIP Content Services SIPis used by: • SIP Devices. • Converters to SIP-Based network: GW Soft Switch SIP-T, SIP-I : protocols that allow ISUP messages to be transported over SIP networks. FMC (Fixed mobile convergence): collection of services and abilities. Used by SIP for redirection, forking, seamless switches etc. IMS (IP Multimedia Subsystem): architectural framework for delivering IP multimedia services. It define an integration of other networks with Internet services. • IP Content Services IP Service DigitalIP IP Digital
- 58. 1SIP Content Services SIPis used by: • SIP Devices. • Converters to SIP-Based network: GW Soft Switch SIP-T, SIP-I : protocols that allow ISUP messages to be transported over SIP networks. FMC (Fixed mobile convergence): collection of services and abilities. Used by SIP for redirection, forking, seamless switches etc. IMS (IP Multimedia Subsystem): architectural framework for delivering IP multimedia services. It define an integration of other networks with Internet services. • IP Content Services IP Service DigitalIP IP Digital
- 59. 1SIP Content Services •Unified communication. • Device hunting (sequential dialing). • Seamless network switch (VCC, MCM). • Media manipulation Text to speech, Recording, Lawful interception, conference with side streaming (distance learning). • Remote Camera control. • Smartphone application wakeup. • In-Browser application (WebRtc). • Presence server (Sync IM presence and Calendar) • Reflect PBX Phones (CTI to IMS). • Pull call/chat to mobile. • Location service (use Cell location for chat application) • Mobile event (lost my phone, unmute lost phone,..)
- 60. 1Example Alice and BobSignaling Session
- 61. 1SIP abilities -Example Alice Bob
- 62. 1SIP abilities -Example Alice BobBob get update in its IM application about Alice location location IM applicationLocation application
- 63. 1 Alice SIP abilities -Example Bob IM application Bob get update in its IM application about Alice location So he sends her a message.
- 64. 1 Alice SIP abilities -Example BobBob get update in its IM application about Alice location So he sends her a message. Alice call Bob through a UC system UC Server
- 65. 1 Alice SIP abilities -Example BobBob get update in its IM application about Alice location So he sends her a message. Alice call Bob through a UC system Bob cellular is off, other devices keep ringing. UC Server
- 66. 1 Alice SIP abilities -Example BobBob get update in its IM application about Alice location So he sends her a message. Alice call Bob through a UC system Bob cellular is off, other devices keep ringing. Bob reject the call from one of his devices UC Server
- 67. 1 Alice SIP abilities -Example BobBob get update in its IM application about Alice location So he sends her a message. Alice call Bob through a UC system Bob cellular is off, other devices keep ringing. Bob reject the call from one of his devices System detect a ‗human reject‘ and cancel all devices. UC Server reject
- 68. 1SIP Content Services •Unified communication. • Device hunting (sequential dialing). • Seamless network switch (VCC, MCM). • Media manipulation Text to speech, Recording, Lawful interception conference with side streaming (distance learning). • Remote Camera control. • Smartphone application wakeup. • In-Browser application (WebRtc). • Presence server (Sync IM presence and Calendar) • Reflect PBX Phones (CTI to IMS). • Pull call/chat to mobile. • Location service (use Cell location for chat application) • Mobile event (lost my phone, unmute lost phone,..)
- 69.
- 70.
- 71.
- 72. 1 IMS - IPMultimedia Subsystem
- 73.
Editor's Notes
- #3 SIP implements a three-way handshake.