adrian georgescu ag projects blink, a state of the art sip client the sip infrastructure experts...

Adrian Georgescu <[email protected]>

AG Projects Blink, a state of the art SIP clientThe SIP Infrastructure Experts

State of the art, easy to use SIP client



Adrian Georgescu

Founder and CEO of AG ProjectsAdvocate of IETF standardsCo-chair of the Dutch ISOC SIP WGTreasurer of OpenSIPS Software Foundation http://opensips.org



I always wanted to create an easy to use real-time communications software



Future proof, based on SIP standards



Not for just for plain telephony but also for other desirable forms of communication:

Wideband Audio, Instant Messaging, File Transfers and Desktop Sharing



I knew it was a difficult task



There are +1200 standards related to SIP today



I was lucky being mentored by Henry Sinnreich, The Godfather of SIP



Most of all relevant Internet technologies are embedded into such software



Many have tried and many have failed



Those who have tried and succeeded are silos, they do not interoperate and are not using Open Standards



What does one need to create a compelling end-user experience for a SIP client application?



First, it has to work!



And one needs a good SIP server implementation with all relevant features to make it work



I started from my goal backwards in 2003



By building the servers, one understands how SIP clients should behave



In 2008, we ended being involved into building relevant SIP infrastructure elements in use by many SIP operators today



OpenSIPS, MediaProxy, OpenXCAP, CDRTool, MSRPRelay



We have created in this process what is AG Projects core business today, selling SIP infrastructure



We gained the necessary experience required for building the SIP client



Phase 1. We secured the necessary funding in early 2008



Phase 2. The foundationStarted the design of the necessary libraries, fall of 2008



SIP SIMPLE client SDK

SIP SIMPLE client SDK is a Software Development Kit for development of Real Time Applications based on SIP and related protocols for media transport like Presence, Audio and Instant Messaging (IM). Other media types can be easily added by using an extensible high-level API.



Target Platforms

The SDK has cross platform capabilities on Linux, Mac OSX, Microsoft Windows is on the roadmap.



General Features

Written in Python Programming LanguageNon-blocking, asynchronous behaviorHigh Level Middleware with Configuration FrameworkTLS Security for signaling (SIP) and media (MSRP, XCAP)Multiple media types per Session (Audio + Video + IM + File Transfer)re-INVITE for adding and removing media to and from SIP sessionsAudio Conferencing, Presence, session based IM, HD Video (roadmap)Wide-band Internet codecs: Speex, G722Narrow-band codecs: G711, iLBC, GSM



SIP Signaling

Session Initiation Protocol RFC3261Session Description Protocol RFC4566An Offer/Answer Model with SDP RFC4566



Location Discovery

Next hop address resolution RFC3263 (DNS NAPTR, SRV, A record lookups) Multicast DNS (a.k.a. Bonjour) draft-lee-sip-dns-sd-uri-03 Other next hop lookup mechanisms can be easily added (e.g. P2PSIP)



NAT Traversal

SIP Signaling: Symmetric Response Routing Symmetric media RFC3581RTP media (Audio and Video): Interactive Connectivity Establishment (ICE) RFC5245MSRP media (IM and File Transfers): Relay Extension RFC4976 and MSRP-ACM



Voice and Video over IP

RTP, A Transport Protocol for Real-Time Applications RFC3550Real Time Control Protocol (RTCP) attribute in Session Description Protocol RFC3605The Secure Real-time Transport Protocol (SRTP) RFC3711Generation and parsing of telephone-events payload in both RTP and SDP RFC283



Multi-party Conferencing

Conference Event Package RFC4575A Framework for Conferencing with the SIP RFC4353 (work in progress)SIP Call Control - Conferencing for User Agents RFC4579 (work in progress)MSRP ad-hoc multi-party chat sessions draft-ietf-simple-chat-06 (work in progress)



Instant Messaging

Common Presence and Instant Messaging (CPIM): RFC3862Session Initiation Protocol (SIP) Extension for Instant Messaging RFC3428MSRP Protocol RFC4975Indication of Message Composition for Instant Messaging RFC3994Message Summary Event Package RFC3842File Transfers RFC5547Desktop Sharing: draft-garcia-mmusic-sdp-collaboration-00 using RFB over MSRP



Presence

SIP Specific Event Notification RFC3265SIP Extension for Event State Publication RFC3903Presence Data Model (PIDF) RFC3863, RFC3379, RFC4479Watcher-info Event Package RFC3857, RFC3858Rich Presence Extensions to PIDF RFC4480Contact Information Extension to PIDF RFC4482User Agent Capability Extension to PIDF RFC5196XCAP Protocol RFC4825Common Policy RFC4745Presence Rules RFC5025Resource Lists RFC4826RLS Services RFC4826PIDF manipulation RFC4827



SIP SIMPLE client SDKThe software has undergone in the past years several interoperability tests at SIPIT and today is of industry strength quality.

The software is now available at:http://SipSimpleClient.com



Having the foundation in place we moved to the next stagePhase 2. The design of the GUI



The key was simplicity and desirability



My father should be able to use it



I stole a bit from Skype and iChat …

“It's not where you take things from - it's where you take them to”. Jean-Luc Godard



Live Demo

Well almost…



Adrian [email protected]: agprojects

http://icanblink.com

mailto:[email protected]

adrian georgescu ag projects blink, a state of the art sip client the sip infrastructure experts...

Documents

art sip client

sip client slide

sip infrastructure slide

sip standards

sip operators

sip clients

sip client application

godfather of sip slide