1. Javascript SIP
A javascript port of
JAIN SIP stack over websocket
François Joseph Levée, Laurent Strullu, Orange Labs
2012 Mobicents Summit
Thanks to Yuemin Qin

2. Rationales
 WebRTC is gaining momentum
– WebRTC = standardized (W3C and IETF) Real Time Communications
in the browser
– Part of webRTC are already available in Google Chrome (Firefox,
opera, and IE are coming..)
 WebRTC does not standardize signaling….
– left to the developer’s choice : JSON, XMPP, SIP, …over HTTP, XHR,
WS…
– WebRTC focus on Media Path (API and protocols): codecs, NAT,
SDP…
 …but re-using already in place SIP based
infrastructure in webRTC would be definitively cool!
– need definition of usage of SIP over a web transport: SIP over WS
IETF draft
– need a Javascript SIP Stack based on a large community  Here we
are with Javascript JAIN SIP!
– need support of WS in SIP components (see Jean and Vladimir
2
presentation tomorrow) libre
diffusion Orange JAIN SIP Javascript port
– need a GW to bridge to already deployed SIP networks and access

3. WebRTC in a nutshell
SIP
SRTP,
Multiplexing,
ICE…
3 diffusion libre

4. Where are we? Availa
ble
 All core JAIN SIP classes today !
have been ported by !
hand (no ugly tool),
 JAIN SIP stack
architecture, API and
naming convention
 used, CORE (RFC3261) implementation supported
all SIP
 Tested with Mobicents SIP over WS early
implementation
 ~550Kb (compressed)
 not fully optimized yet (see next steps)
 no SDP Javascript library available (but SDP handling is
part of PeerConnection API)
 http://code.google.com/p/jain-sip/source/checkout?
4 repo=javascript
Javascript SIP diffusion libre Orange JAIN SIP Javascript port

5. Example
 JAIN SIP Client sample : SIP INVITE request creation and
emission for a JAIN SIP ware developer ;-)
 Higher level API for web developer is planned as
next step
5 diffusion libre Orange JAIN SIP Javascript port

6. Default application
• A basic WebRTC JAIN SIP softphone WebApp can be found
in the project Google code repository:
~50
lines
= of
code!!
 This application will be the default application in
MSS2.0, allowing to do SIP calls without a native SIP
phone !
6 diffusion libre Orange JAIN SIP Javascript port

7. Next Steps
 Very Short term (Q4 2012)
– Provide a higher level Communication Framework
– New features:
– Add WSS support (required for security and proxy
traversal)
– Add Keep Alive (RFC5626) (required for server side
connectivity info)
– Optimizations:
– multithreading using web workers for message parsing
– more library size minimization
 Short term (Q12013)
– Add IMS/RCS profile
7 diffusion libre Orange JAIN SIP Javascript port

8. References
 rtcweb IETF WG: http://tools.ietf.org/wg/rtcweb/
 WebRTC W3C: http://www.w3.org/TR/2012/WD-webrtc-
20120821/
 www.webrtc.org
 Javascript JAIN stack port:
http://code.google.com/p/jain-sip/source/checkout?
repo=javascript
8 Javascript SIP diffusion libre Orange JAIN SIP Javascript port

9. Questions ?
9 Javascript SIP diffusion libre

10. Thank you !