Telepresence Interoperability Protocol (TIP) Overview for IMTC SuperOp 2010 Workshop 1 Allyn Romanow Cisco Telepresence Systems Business Unit (TSBU) 15 June 2010

Agenda  What is TIP?  Background  Interesting Features  Documentation  Current status  What is TIP?  Background  Interesting Features  Documentation  Current status 2

What is TIP?  Telepresence Interoperability Protocol  Immediate interoperability with Cisco WHILE working on an industry standard  Signaling media and media control – Controls media – Identifies positions and lots of functions – Uses RTCP for signaling instead of SIP/SDP  Telepresence Interoperability Protocol  Immediate interoperability with Cisco WHILE working on an industry standard  Signaling media and media control – Controls media – Identifies positions and lots of functions – Uses RTCP for signaling instead of SIP/SDP 3

Use Cases, Point to Point and Multi-point TIP MCU TIP Point-to-point Calls Multipoint Calls TIP Call Agent

Background  Cisco opened up TIP to kick start multi-vendor, multi-screen interoperability while IMTC, the industry work on a suite of standards  Spec (v6, v7) and profile(s)  TIP Library Open Source project to launch by 1 July  Cisco to transfer ownership of TIP and Library to IMTC to own, govern, change control  Cisco opened up TIP to kick start multi-vendor, multi-screen interoperability while IMTC, the industry work on a suite of standards  Spec (v6, v7) and profile(s)  TIP Library Open Source project to launch by 1 July  Cisco to transfer ownership of TIP and Library to IMTC to own, govern, change control 5

Features- What’s Interesting? Using RTCP for signaling media controlMultiplexing similar RTP streams onto 1 RTP sessionSwitching (simulcasting) rather than transcodingSecurity 6

Telepresence Interoperability Protocol (TIP) Session Establishment (SIP)TIP Message Exchange RTCP Data RTP CTMS CUCM A

Signaling Media Control  Signals endpoints multi-screen capabilities and how streams are mapped to physical devices.  Defines positional identifiers (left, right, center,aux)  Uses the RTCP private extension mechanism  APP packet – APP MUXCTRL – number and positions of media streams can transmit and receive – APP MEDIAOPTS – AAM, G.711, Refresh, codec,feedback, algorithms  Uses RTP Contributing Source (CSRC)

RTP Muxing  Multiplexes all its video and audio streams into one video RTP session and one audio RTP session  CSRC used to demultiplex at receiver  Advantages – getting through SIP B2BUAs, NAT/FW that does not support multiple media lines of same media type  Disadvantages – non-standard

All Video Streams Share 1 Common RTP Connection  Max 4 Video Streams – Center, Left and Right Camera = 3 Video streams – Data Video = 1 Video stream  Each Camera stream is sent to the corresponding Display  Data Video stream is sent to the Projector HDMI Outlet Video RTP Session CTS 2 CTS 1 or

All Audio Streams Share Common RTP Connection  Max 4 AAC-LD Audio Streams  Center, Left and Right channels = 3 streams  Line in and Audio Add-in = 1 stream CTS 1 (In) CTS 2 (Out) Audio RTP Session

CUVC Interoperability through “Switching” New York London H.323 or H.320 Videoconferencing H p or 720p AAC-LD Tokyo CTMS G.722 or G.711 Any video format CUVC supports Any audio format CUVC supports H.264 CIF (SD interop only) Active Segment Cascade Video Telephony SIP Video Telephony 12

Security (in v7)  Encryption (SRTP) with these key exchange approaches  Point-to-point: Keys negotiated through DTLS (TLS over UDP) in-band within the RTP media stream [RFC 5764]  Point-to-multipoint: EKT (Encrypted Key Transport)

Current Status  Becomes part of IMTC July 31  New IMTC working group- TIP AG – Process for making changes to spec – Interop testing – Co-chairs  Source license management

Questions?

TIP Capabilities  1080p at 30 fps, or 780p  AUX/collaboration screen, w/ maximum fps indication (1, 5 or 30 fps)  Audio Activity Metric (for multipoint switching)  Enhanced Codec capability/profile negotiation, such as CABAC, LTRP, GDR and IDR, etc.  TIP feedback is ACK centric

Telepresence Interoperability Protocol (TIP) TIP Use Cases – 3 rd party Endpoints in Cisco Deployment TIP Point-to-point Calls Multipoint Calls Adhoc, Scheduled, Static CUCM Endpoints Registered To CUCM (*) Endpoints Registered To CUCM (*) Cisco TelePresence Cisco CTMS or TelePresence Server (*) Alternatively may connect to a separate call agent that connects to the CUCM via a trunk interface. TIP

TIP Use Cases – 3 rd party MCUs in Cisco Deployment Telepresence Interoperability Protocol (TIP) TIP Trunk To CUCM (*) TIP Cisco TelePresence Cisco CTMS Other MCU (*) Alternatively may connect to a separate call agent that connects to the CUCM via a trunk interface. Trunk To CUCM (*) TIP