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 ...

Abstract: Both of SIP and H.323 are widely used in VoIP. H.323 has wonderful structure. With H.323, it is easy to establish and control a call. SIP is a text based protocol. Although it is simpler ...

Abstract: As a result of some protocols of high security like SRTP protocol which is applied effectively in some occasions of quite high security requirements, here, propose an encryption algorithm ...

So far in this series I have described two telephony protocols (SIP and MGCP) that feature prominently on the CCIE Voice and CCVP exam blueprints. In this blog entry, I am going to describe another, H ...

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 ...

COLORADO SPRINGS, Colo. — Radvision's technology business unit, responsible for licensing OEM versions of H.323 conferencing protocol stacks, has begun shipping integrated software tool kits and ...

Layer 7 switching isn’t just for Web servers anymore. Two companies are working to integrate the technology into voice-over-IP networks for corporations and service providers. The ability to route ...

A lack of interoperability between different systems has been one of the barriers preventing videoconferencing and telepresence from being widely adopted in the enterprise. There’s nothing worse that ...

An ITU standard for real-time voice and videoconferencing over packet networks, including LANs, WANs and the Internet. Although H.323 is a very comprehensive standard that supports voice, video, data, ...