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Explore: SIP, Protocols

The Session Initiation Protocol (SIP) is an application-layer control (signaling) protocol for creating, modifying, and terminating sessions with one or more participants. These sessions include Internet telephone calls, instant messaging, multimedia...
This page was last updated on September 5th, 2008
SIP (from Protocols)
Canadian Content » Computers » Internet » Protocols » SIP »
VoIP UserVoIP User
Consumer guide and forum. Also has software phone downloads and links to service providers.
VoIP NewsVoIP News
Information on available technologies and software/hardware product reviews.
SIP Compose GroupSIP Compose Group
A working group experimenting and documenting the protocol. Contains various internet technical resources.
SIP ForumSIP Forum
A membership based forum. Also contains a news board.
Brekeke SoftwareBrekeke Software
Products for small to medium sized offices and a server database.
Session Initiation Protocol (SIP)Session Initiation Protocol (SIP)
FAQs, background materials and lists of current work in this field.
Free IP CallFree IP Call
A proxy service provider with information in English and French.
SipcallSipcall
A UK based service provider. Also contains hardware related links and protocol white-papers.
Soft FrontSoft Front
Provides a development environment for software centered around SIP/VoIP technology.
PC Phone ReviewPC Phone Review
News and reviews of hardware, software and service providers in the United States.
The SIP CenterThe SIP Center
Portal with technical and market resources aimed at commercial developers. Also provides a testbed area for software and proxy development.
BaseVoiceBaseVoice
Commercial software development company that produces PBX, router, proxy and application server software.
JustIT PBXJustIT PBX
A solid state hybrid PBX product combining PSTN telephony with Voice over IP.
SIP WikiSIP Wiki
Wiki based resource containing information and links.
SIP411 Directory ServicesSIP411 Directory Services
A Yellow Pages style directory of SIP addresses.
Parrish SystemsParrish Systems
Sells off the shelf code for SIP, SDP and RTP protocols and provides a software consultancy service
Interactive Intelligence, Inc.Interactive Intelligence, Inc.
Developers of a proxy server. Site contains downloads, documentation and a forum.
Ninetel USANinetel USA
A USA based proxy service provider and supplier of hardware phones and routers. Site contains call rates and service details.
SIPquest Inc.SIPquest Inc.
Software component developer for service providers and telecom equipment vendors.
PROTOS Test SuitePROTOS Test Suite
A test-suite to find vulnerabilities in protocol software.
pulver.compulver.com
A collection of information on the protocol. Contains news, reports and an IP telephony job noticeboard.

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