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| Web Sites |
BaseVoice
Commercial software development company that produces PBX, router, proxy and application server software.
http://www.basevoice.com
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Brekeke Software
Products for small to medium sized offices and a server database.
http://www.brekeke.com/
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eSMS.com
Provides UK phone numbers which forward calls to SIP.
http://www.esms.com
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Free IP Call
A proxy service provider with information in English and French.
http://www.freeipcall.com
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LignUp Corp
Applications developer. Products include software PBX's for enterprise and service providers.
http://www.lignup.com/
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Ninetel USA
A USA based proxy service provider and supplier of hardware phones and routers. Site contains call rates and service details.
http://www.ninetelusa.com
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OpenSER
A branch of the SIP Express Router project, offering an open-source SIP server.
http://openser.org/
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Parrish Systems
Sells off the shelf code and provides a software consultancy service.
http://www.parrishsys.com
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PC Phone Review
News and reviews of hardware, software and service providers in the United States.
http://www.pcphonereview.com
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PROTOS Test Suite
A test-suite to find vulnerabilities in protocol software.
http://www.ee.oulu.fi/research/ouspg/protos/testing/c07/sip/
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pulver.com
A collection of information on the protocol. Contains news, reports and an IP telephony job noticeboard.
http://www.pulver.com/
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Session Initiation Protocol (SIP)
FAQs, background materials and lists of current work in this field.
http://www.cs.columbia.edu/sip/
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SIP Forum
A membership based forum. Also contains a news board.
http://www.sipforum.org/
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SIP Made Easy
An introductory tutorial talks about protocol functions, components, message types, how it works and where it is applied.
http://geocities.com/intro_to_multimedia/SIP/
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SIP Wiki
Wiki based resource containing information and links.
http://www.toyz.org/cgi-bin/sipwiki.cgi
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SIPfoundry
An international open source community providing VoIP solutions and technology based on the SIP standard.
http://www.sipfoundry.org/
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Soft Front
Provides a development environment for software centered around SIP/VoIP technology.
http://www.softfront.co.jp/en/
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Tech Invite
Portal containing links to technical information and RFC documentation.
http://www.tech-invite.com
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The SIP Center
Portal with technical and market resources aimed at commercial developers. Also provides a testbed area for software and proxy development.
http://www.sipcenter.com/
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Voice System
Design, consultancy and development for SIP Express Router (SER) servers.
http://www.voice-sistem.ro
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VoIP News
Information on available technologies and software/hardware product reviews.
http://www.voip-news.com
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VoIP User
Consumer guide and forum. Also has software phone downloads and links to service providers.
http://www.voipuser.org
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