Cisco TIP Presentation

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

Agenda
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
3

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

Background
Cisco opened up TIP to kick start multi-vendor, multi-screen interoperability while IMTC, the industry work on a suite of standardshttp://www.cisco.com/go/tip
Spec (v6, v7) and profile(s)
TIP Library Open Source project to launch by 1 Julyhttp://tiprotocol.sourceforge.net
Cisco to transfer ownership of TIP and Library to IMTC to own, govern, change control
5

Features- What’s Interesting?
6

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

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
CTS 1
CTS 2
Video
RTP Session
or
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

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

Interoperability through “Switching”
Active SegmentCascade
London
H.323 or H.320 Videoconferencing
Tokyo
CUVC
CTMS
SIP Video Telephony
New York
Video Telephony
H.264 1080p or 720p
Any video format CUVC supports
H.264 CIF (SD interop only)
Any audio format CUVC supports
AAC-LD
G.722 or G.711
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

TIP Use Cases – 3rd party Endpoints in Cisco Deployment
Endpoints
Registered
To CUCM (*)
Point-to-point Calls
CUCM
Cisco TelePresence
Endpoints
Registered
To CUCM (*)
Multipoint CallsAdhoc, Scheduled, Static
CUCM
TIP
TIP
TIP
TIP
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 Use Cases – 3rd party MCUs in Cisco Deployment
Trunk
To CUCM (*)
Cisco TelePresence
Cisco CTMS
Other MCU
Trunk
To CUCM (*)
TIP
TIP
TIP
TIP
Cisco TelePresence
Other MCU
(*) Alternatively may connect to a separate call agent that connects to the CUCM via a trunk interface.

Cisco TIP Presentation

by IMTC on Jul 01, 2010

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