Applied Voice & Speech Technologies, Inc. (AVST) - Applied Voice and Speech Technologies, Inc. (AVST) offers SIP integrations to its flagship CallXpress unified communications platform.
BaseVoice - Commercial software development company that produces PBX, router, proxy and application server software.
Bluenote Internet Telephony Networks - Server software targetted at the enterprise sector.
3CX - Developers of IP PBX software for Windows.
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.
OpenSER - A branch of the SIP Express Router project, offering an open-source SIP server.
Help build the largest human-edited
directory on the web.
