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Adrian Georgescu Founder and CEO of AG Projects Advocate of IETF standards (Internet Standards) Co-chair the Dutch ISOC SIP Special Interest Group Treasurer of OpenSIPS Software Foundation http:// opensips.org. SIP SIMPLE Client SDK.

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Adrian Georgescu

Founder and CEO of AG Projects

Advocate of IETF standards (Internet Standards)

Co-chair the Dutch ISOC SIP Special Interest Group

Treasurer of OpenSIPS Software Foundation http://opensips.org



The project started with my dream to create an easy to use Real Time Communications software library


Based on Open Standards related to SIP protocol Real Time Communications software library


SIP protocol Real Time Communications software library

SIP stands for 'Session Initiation Protocol', an IETF standard described by RFC 3261.

SIP is an Internet application-layer control protocol that can establish, modify and terminate multimedia sessions such as Internet telephony calls (VoIP). Media can be added to (and removed from) an existing session.


SIP is not for just for plain telephony replacement but also for other desirable forms of communication:

HD Audio, Video, Instant Messaging and Desktop Sharing.

SIP is a future-proof protocol, think about email and www


I knew it was a difficult task for other desirable forms of communication:


There are +1200 related standards today for other desirable forms of communication:




Those who have tried and succeeded are walled-garden 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 application?


First, it has to work! experience for a SIP application?



I started from my initial goal in 2003 with all relevant features


Building SIP servers with all relevant features



In 2008, we finished building several relevant SIP server components in use by many operators today


OpenSIPS components in use by many operators today - SIP Proxy/Registrar/Presence Agent

MediaProxy - Relay for RTP media

MSRPRelay - Relay for MSRP media

OpenXCAP - Policy server for Presence

CDRTool - Accounting and Mediation


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




We started building the foundation for a generic SIP client in early 2008.

We are now 90% done after 2 years of development


SIP SIMPLE client SDK in early 2008.

http://SipSimpleClient.com


SIP SIMPLE client SDK in early 2008.

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.

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


SIP SIMPLE client SDK in early 2008.

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

The library should work with minimal changes on any platform that supports C and Python development environments.


Generic Features in early 2008.

Written in Python Programming Language

Non-blocking and Asynchronous

High Level Middleware with Configuration Framework

TLS Security for signaling (SIP) and media (MSRP, XCAP)

Multiple Media Types per Session (e.g. Audio + IM)

Trace capability for all underlying protocols

Supports re-INVITE for adding and removing media

Audio Conference Bridge

Wav Player and Recorder

Acoustic Echo Cancelation

Answering Machine with take over support

Wide-band Internet codecs: Speex and G722

PSTN compatible codecs: G711, iLBC, GSM


SIP Signaling in early 2008.

Session Initiation Protocol RFC3261

Session Description Protocol RFC4566

An Offer/Answer Model with Session Description Protocol (SDP) RFC4566


Location Discovery in early 2008.

RFC3263 next hop resolution lookup

Bonjour multicast DNS http://tools.ietf.org/html/draft-lee-sip-dns-sd-uri-03 (work in progress


NAT Traversal in early 2008.

SIP Signaling: Symmetric Response Routing Symmetric media RFC3581

RTP media (Audio and Video): Interactive Connectivity Establishment (ICE) draft-ietf-mmusic-ice-19

MSRP media (Instant Messaging and File Transfers): MSRP Protocol Relay Extension RFC4976


Voice and Video over IP in early 2008.

RTP, A Transport Protocol for Real-Time Applications RFC3550

Real Time Control Protocol (RTCP) attribute in Session Description Protocol (SDP) RFC3605

The Secure Real-time Transport Protocol (SRTP) RFC3711

Generation and parsing of RFC 2833/telephone-events payload in both RTP and SDP RFC283


Multi-party Conferencing in early 2008.

Conference Event Package RFC4575

A Framework for Conferencing with the Session Initiation Protocol 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-05 (work in progress)


Instant Messaging in early 2008.

Common Presence and Instant Messaging (CPIM): RFC 3862

Session Initiation Protocol (SIP) Extension for Instant Messaging RFC3428

MSRP Protocol RFC4975

Indication of Message Composition for Instant Messaging RFC3994

Message Summary Event Package RFC3842

File Transfer RFC5547

Desktop Sharing: Variation of draft-garcia-mmusic-sdp-collaboration-00 using RFB over MSRP


Presence in early 2008.

SIP Specific Event Notification RFC3265

SIP Extension for Event State Publication RFC3903

Presence Data Model (PIDF) RFC3863, RFC3379, RFC4479

Watcher-info Event Package RFC3857, RFC3858

Rich Presence Extensions to PIDF RFC4480

Contact Information Extension to PIDF RFC4482

User Agent Capability Extension to PIDF RFC5196

XCAP Protocol RFC4825

Common Policy RFC4745

Presence Rules RFC5025

Resource Lists RFC4826

RLS Services RFC4826

PIDF manipulation RFC4827



We secured the funding from AG Projects and Graphical User Interface SIP clientNLNet Foundation


The key was simplicity and desirability Graphical User Interface SIP client


My father should be able to use it Graphical User Interface SIP client


My wife should find pleasure in using it Graphical User Interface SIP client


My son should be proud his father did it Graphical User Interface SIP client


Welcome to Graphical User Interface SIP clientBlink!


My name is Adrian Georgescu Graphical User Interface SIP client

[email protected]

Twitter: agprojects

http://SipSimpleClient.com

http://iCanBlink.com


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