Slides from the talk given at FOSDEM 2012

1. SIP beyond VoIP
Saúl Ibarra Corretgé | AG Projects

2. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
AG Projects
● SIP infrastructure for providers
● SIPThor: horizontal scalability
● Software projects:
● Blink
● SIP SIMPLE SDK
● SylkServer
● MediaProxy
● OpenXCAP
● MSRPRelay

3. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
Did you use SIP for non-VoIP related stuff?

4. What do we use SIP for?

5. To emulate PSTN
... booooooooring!

6. ¿Can you send
it over E-Mail?
Did it also happen
to you?

7. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
Beyond VoIP
● SIP was designed to be extensible
● Audio & video (RTP) are only 2 examples
of possible media streams
● There are 10s of RFCs already defined,
it's time to get our hands dirty

9. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
7 years ago...
Published in July
2005
No, seriously

10. SIP beyond VoIP
New media Collaboration
Presence
types tools

11. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
Presence

12. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
SIMPLE presence
● SIP for Instant Messaging and Presence Leveraging
Extensions
● IETF WG who delivered instant messaging and
presence for SIP
● SIMPLE defines an extensible framework based in
the Pub-Sub model
● SUBSCRIBE
● PUBLISH
● NOTIFY
● Extended in several RFCs

13. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
SIMPLE presence
● Presence, 21st century's ringtone?
● We need to syncronize the time for communication

14. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts

15. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
SIMPLE is not simple

16. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
New media
types

17. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
MSRP
● Message Session Relay Protocol
● The “beyond VoIP” media type
● Session based IM for SIP
● RFC 3428 (SIP MESSAGE) is not true IM
● Just a couple of RFCs! (4975 & 4976)

18. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
MSRP
● With MSRP a TCP connection is negotiated between
endpoints
● Chat sessions
● File transfer (RFC 5547)
● Desktop sharing
– VNC over MSRP (expired draft)
– Image streaming

19. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
Collaboration
tools

20. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
SIP Conferencing
● Current conference servers are usually just RTP
mixers
● Conferences need additional context aware
information
● Enhancing conferencing with SIP. Today.
● New media types
● Session information
● Participants information
● Shared resources

21. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
SIP Conferencing
● Extensible framework defined in a few RFCs: 4575,
4353, 4579, draft-ietf-simple-chat
● Uses Pub-Sub framework: PUBLISH, SUBSCRIBE y
NOTIFY (same as presence, MWI)
● Conference control operations: REFER method

22. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts

23. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
Contact: <sip:test@81.23.228.139:5060>;isfocus

24. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts

25. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
SylkServer
● Open Source conferencing server
● Built on top of SIPSIMPLE SDK
● Features
● HD audio conferencing
● Multiparty ad-hoc chatrooms
● Participants information
● File transfers (push / pull)
● Screen sharing
http://sylkserver.com

26. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts

27. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
Blink
● A “SIP beyond VoIP” client
● Some stuff is in progress ;-)
● Cross platform and Open Source
http://icanblink.com

28. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
Blink Cocoa
● HD audio
● Chat
● File transfers
● Desktop sharing
● Rich conferencing
● Contact sync (XCAP)
● Acoustic Echo
Cancellation (AEC)

29. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts

30. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
Blink Qt

31. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
Go beyond
VoIP today

32. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts

33. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
BYE

34. 1. VoIP is old and boring

35. 2. Our customers need help

36. 3. Use Open Standards
and Open Source

37. 4. “Let's build it before
we're too old to enjoy it”
Carl G. Fisher

38. 5. “Skate to where the
puck is going to be, not
where it has been”
Wayne Gretzky

39. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts

40. AG Projects SIP beyond VoIP
The SIP Infrastructure Experts
BYE sip:audience@fosdem2012 SIP/2.0
Via: SIP/2.0/UDP 192.168.99.23:49919;rport;branch=z9hG4bKPjDb30Dx0sH-ozn9QB.cCCboyU.atR97aM
Max-Forwards: 70
From: "saghul" <sip:saul@ag-projects.com>;tag=UCpGKVZbQQx7BUKYtiuPEX668oa9jaU7
To: <sip:audience@fosdem2012>;tag=as59aef35c
Call-ID: DEWDfu63OACwYeQk7MrhmRhRq.1cqqis
CSeq: 10633 BYE
Route: <sip:81.23.228.129;lr;ftag=UCpGKVZbQQx7BUKYtiuPEX668oa9jaU7;did=641.a8a9c553>
User-Agent: blink-0.20.2
Content-Length: 0
@saghul
saul@ag-projects.com
sip:saul@ag-projects.com