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 | BaseVoice
Commercial software development company that produces PBX, router, proxy and application server software. |  | Brekeke Software
Products for small to medium sized offices and a server database. |  | eSMS.com
Provides UK phone numbers which forward calls to SIP. |  | Free IP Call
A proxy service provider with information in English and French. |  | Interactive Intelligence, Inc.
Developers of a proxy server. Site contains downloads, documentation and a forum. |  | LignUp Corp
Applications developer. Products include software PBX's for enterprise and service providers. |  | Ninetel USA
A USA based proxy service provider and supplier of hardware phones and routers. Site contains call rates and service details. |  | OpenSER
A branch of the SIP Express Router project, offering an open-source SIP server. |  | Parrish Systems
Sells off the shelf code and provides a software consultancy service. |  | PC Phone Review
News and reviews of hardware, software and service providers in the United States. |
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