Deployment of voice-over-IP endpoints, such as Session Initiation Protocol phones and H.323 IP PBXs, within corporations has presented IT with new interoperability challenges. A new breed of network ...

Earlier this month, the National Infrastructure Security Coordination Centre in the U.K. advised that implementations of the H.323 protocol are vulnerable to denial-of-service attacks and could even ...

For years, carriers and equipment manufacturers loved to quibble over the best signaling scheme for their voice-over-IP (VoIP) gateway architectures. During the debate, industry members pitted the ...

H.323, the ITU's umbrella standard for audio, video and data-sharing over packet (IP) networks, is already widely deployed and has significant market share. SIP, the IETF's multimedia signaling ...