VoIP & SIP Innovations
– The Internet Engineering Task Force: SIP Working Group
The Internet Engineering Task Force (IETF) is a large open international
community of network designers, operators, vendors, and researchers
concerned with the evolution of the Internet architecture and the
smooth operation of the Internet. It is open to any interested individual.
The Session Initiation Protocol (SIP) working group is chartered
to continue the development of SIP, currently specified as proposed
standard RFC 2543.
University Department of Computer Science – SIP
The Session Initiation Protocol (SIP) research and developments
of the Columbia University, Computer of Science Department, organised
by the Professor Henning Schulzrinne.
The SIP Center
The SIP Center is a portal for the commercial development of the
Session Initiation Protocol. Serving both the SIP community and
the wider industry.
The SIP Forum's mission is to advance the adoption of products and
services based on the Session Initiation Protocol.
– International Telecommunication Union
The ITU, headquartered in Geneva, Switzerland is an international
organization within the United Nations System where governments
and the private sector coordinate global telecom networks and services.
Open Source VoIP Products
Vovida is a communications community site dedicated to providing
a forum for open source software used in datacom and telecom environments.
– SIP Express Router
SIP Express Router (ser) is a high-performance, configurable, free
SIP (RFC3261) server. It can act as SIP registrar, proxy or redirect
Asterisk is a complete PBX in software. It runs on Linux and provides
all of the features you would expect from a PBX and more. Asterisk
does voice over IP in three protocols, and can interoperate with
almost all standards-based telephony equipment using relatively
The online site of the TMCnet Internet Telephony Magazine.
The online site of the CMP Media Communications Convergence Magazine.
The Voiceglobe users and visitors forum for VoIP and Internet Telephony.
Exchange ideas on VoIP and Videoconferencing at …
Forum for discussion of Voice over IP performance issues and problems.
A user’s guide to the VoIP revolution