| Directory > Computers > Internet > Protocols > SIP VoIP User
Consumer guide and forum. Also has software phone downloads and links to service providers.
http://www.voipuser.co.uk
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VoIP News
Information on available technologies and software/hardware product reviews.
http://www.voip-news.com
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SIP411 Directory Services
A Yellow Pages style directory of SIP addresses.
http://www.sip411.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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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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Curibo
German vendor offering hardware and software SIP products.
http://www.curibo.de/
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Interactive Intelligence, Inc.
Developers of a proxy server. Site contains downloads, documentation and a forum.
http://www.inin.com/sipproxy
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Parrish Systems
Sells off the shelf code for SIP, SDP and RTP protocols and provides a software consultancy service
http://www.parrishsys.com
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Fordyce UK
FreeSIP and SIPCall proxy services. Also sells broadband communications hardware.
http://www.fordyce.uk.com
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Brekeke Software
Offers SIP products for small-mid sized offices and a SIP server database.
http://www.brekeke.com/
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SIPquest Inc.
Software component developer for service providers and telecom equipment vendors.
http://www.sipquest.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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SIP Forum
A membership based forum. Also contains a news board.
http://www.sipforum.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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Sipcall
A UK based service provider. Also contains hardware related links and protocol white-papers.
http://www.sipcall.co.uk/
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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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SIPdev
An online community devoted to the emerging developments in Session Initiated Protocol.
http://www.sipdev.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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Session Initiation Protocol (SIP)
Protocol for establishing multimedia sessions and Internet telephone calls. FAQs, background
materials and lists of current work.
http://www.cs.columbia.edu/sip/
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