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Version 363 (Adrian Georgescu, 01/10/2009 01:19 pm)

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= Description =
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[[Image(htdocs:SIPSIMPLE-client.png, align=right, nolink)]]
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SIP SIMPLE client is Python software library built on top of PJSIP that
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together with middleware allows for easy development of Client/Server and
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Peer-to-Peer Internet communications end-points based on SIP SIMPLE family
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of protocols for voice, video, presence, instant messaging (IM) and file
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transfer capabilities.
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The software is provided under the [source:LICENSE GPL LICENSE] 
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The goal of this project is to deliver the best open source Python library
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for rich featured SIP end-points, while hiding the complex underlying
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functionality behind an easy to use high-level application-programming
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interface. This package supports to the SDP negotiation, audio codecs and
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NAT traversal functionality provided by PJSIP and will thus deliver rich
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communications combining instant messaging (IM), voice and video streams. It
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also supports file transfer and multi-party chat sessions using MSRP
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protocol, publication and subscription for rich presence information such as
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availability, moods, activities and geo-location, management for presence
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rules, resource lists, RLS services using XCAP protocol.
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== Background ==
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SIP stands for 'Sessions Initiation Protocol', an IETF standard described by
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[http://tools.ietf.org/html/rfc3261 RFC 3261]. SIP is an application-layer control protocol that can establish,
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modify and terminate multimedia sessions such as Internet telephony calls
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(VoIP). Media can be added to (and removed from) an existing session.
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SIP transparently supports name mapping and redirection services, which
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supports personal mobility, users can maintain a single externally visible
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address identifier, which can be in the form of a standard email address or
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E.164 telephone number regardless of their physical network location.
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SIP allows the endpoints to negotiate and combine any type of session they
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mutually understand like video, instant messaging (IM), file transfer,
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desktop sharing and provides a generic event notification system with
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real-time publications and subscriptions about state changes that can be
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used for asynchronous services like presence, message waiting indicator and
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busy line appearance.
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== Features ==
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The software allows you to create elegant real-time communications applications without having to read [http://www.rfc3261.net the +1200 RFC documents] behind it. As a library with a high-level [wiki:PyPJUADesign API], the toolkit can be used to add voice, IM and Presence functionality to any network devices as long as Python/C environment is supported by such platform.
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Additional to the SIP standards implemented by the underlying PJSIP library, this project implements:
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 * XCAP protocol [http://www.tools.ietf.org/html/rfc4825 RFC4825]
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 * MSRP protocol [http://tools.ietf.org/html/rfc4975 RFC4975]
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 * MSRP protocol relay extension [http://tools.ietf.org/html/rfc4976 RFC4976]
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 * Rich Presence Information Data model and Format (RPIDF) [http://tools.ietf.org/html/rfc3856 RFC3856], [http://tools.ietf.org/html/rfc3863 RFC3863 ], [http://tools.ietf.org/html/rfc4479 RFC4479]
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 * XCAP-diff event package [http://www.ietf.org/internet-drafts/draft-ietf-simple-xcap-diff-09.txt draft-ietf-simple-xcap-diff-09]
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 * Watcher-info [http://tools.ietf.org/html/rfc3857 RFC3857], [http://tools.ietf.org/html/rfc3858 RFC3858]
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 * Conference [http://tools.ietf.org/html/rfc4575 RFC4575]
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 * Message summary [http://tools.ietf.org/html/rfc3842 RFC3842]
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 * Presence rules [http://www.tools.ietf.org/html/rfc5025 RFC5025]
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 * Resource-lists and RLS-services [http://www.tools.ietf.org/html/rfc4826 RFC4826]
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 * PIDF manipulation [http://www.tools.ietf.org/html/rfc4827 RFC4827]
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 * Bonjour multicast DNS [http://www.ietf.org/internet-drafts/draft-lee-sip-dns-sd-uri-03.txt draft-lee-sip-dns-sd-uri-03]
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 * Locating SIP services [http://tools.ietf.org/html/rfc3263 RFC3263]
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 * MSRP ad-hoc multi-party chat sessions [http://tools.ietf.org/html/draft-ietf-simple-chat-03 draft-ietf-simple-chat-03]
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== Documentation ==
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For download and installation instructions, API description and other 
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documentation see the files under docs/ directory.
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 * SIP SIMPLE client [wiki:SipInstallation installation guide].
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 * [wiki:SipApiDocumentation API] documentation
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 * [wiki:SipMiddleware Middleware design]
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 * [wiki:SipTesting Testing] the client
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== Support ==
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The project is developed and supported by [http://ag-projects.com AG Projects] via the wiki collaboration system available at http://sipsimpleclient.com. To request support you must open a ticket. To open ticket please [/register Register] first. The source browser and ticketing system are available only for registered users. 
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If you wish to contribute and become an active developer of this project, send your request by email to pypjua-devel@ag-projects.com.