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Categories
Client Software (8)
Server Software (6)
Service Providers (3)
Web Pages
Viewing in Google PageRank order               View in alphabetical order
  Session Initiation Protocol (SIP) - http://www.cs.columbia.edu/sip/
FAQs, background materials and lists of current work in this field.
  pulver.com - http://www.pulver.com/
A collection of information on the protocol. Contains news, reports and an IP telephony job noticeboard.
  The SIP Center - http://www.sipcenter.com/
Portal with technical and market resources aimed at commercial developers. Also provides a testbed area for software and proxy development.
  SIP Forum - http://www.sipforum.org/
A membership based forum. Also contains a news board.
  Tech Invite - http://www.tech-invite.com
Portal containing links to technical information and RFC documentation.
  PROTOS Test Suite - http://www.ee.oulu.fi/research/ouspg/protos/testing/c07/sip/
A test-suite to find vulnerabilities in protocol software.
  SIPfoundry - http://www.sipfoundry.org/
An international open source community providing VoIP solutions and technology based on the SIP standard.
  FirstHand Technologies - http://www.firsthandtech.com/
Client and server software developer for service providers and telecom equipment vendors, to address enterprise mobility markets.
  VoIP User - http://www.voipuser.org
Consumer guide and forum. Also has software phone downloads and links to service providers.
  Soft Front - http://www.softfront.co.jp/en/
Provides a software development environment.
  SIP Wiki - http://www.toyz.org/cgi-bin/sipwiki.cgi
Wiki based resource containing information and links.
  Voice System - http://www.voice-sistem.ro
Design, consultancy and development for SIP Express Router (SER) servers.
  Vidosystem - http://www.vidosystem.com
Produces softphones. Site has downloads section and information on protocols supported.
  SIP411 Directory Services - http://www.sip411.com
A Yellow Pages style directory of SIP addresses.
  IETF SIP Charter - http://www.ietf.org/html.charters/sip-charter.html
Working group for protocol development. Links to RFC's and internet drafts.

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