| 1. | Session Initiation Protocol (SIP) | | | Protocol for establishing multimedia sessions and Internet telephone calls. FAQs, background materials and lists of current work.
www.cs.columbia.edu |
| 2. | The SIP Center | | | Portal with technical and market resources aimed at commercial developers. Also provides a testbed area for software and proxy development.
www.sipcenter.com |
| 3. | SIPdev | | | An online community devoted to the emerging developments in Session Initiated Protocol.
www.sipdev.com |
| 4. | pulver.com | | | A collection of information on the protocol. Contains news, reports and an IP telephony job noticeboard.
www.pulver.com |
| 5. | Sipcall | | | A UK based service provider. Also contains hardware related links and protocol white-papers.
www.sipcall.co.uk |
| 6. | Soft Front | | | Provides a development environment for software centered around SIP/VoIP technology.
www.softfront.co.jp |
| 7. | SIP Forum | | | A membership based forum. Also contains a news board.
www.sipforum.org |
| 8. | PROTOS Test Suite | | | A test-suite to find vulnerabilities in protocol software.
www.ee.oulu.fi |
| 9. | SIPquest Inc. | | | Develops software for enterprises and ISPs to facilitate communication over converged networks.
www.sipquest.com |
| 10. | Brekeke Software | | | Offers SIP products for small-mid sized offices and a SIP server database.
www.brekeke.com |
| 11. | Parrish Systems | | | Sells off the shelf code for SIP, SDP and RTP protocols and provides a software consultancy service
www.parrishsys.com |
| 12. | Curibo | | | German vendor offering hardware and software SIP products.
www.curibo.de |
| 13. | Ninetel USA | | | A USA based proxy service provider and supplier of hardware phones and routers. Site contains call rates and service details.
www.ninetelusa.com |
| 14. | Free IP Call | | | A proxy service provider with information in English and French.
www.freeipcall.com |
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