Several critical vulnerabilities have been discovered in voice over Internet Protocol (VoIP) and videoconferencing products based on the H.323 protocol that’s used in IP telephony applications to ...

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 ...

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 ...

Microsoft is still investigating which of its products are vulnerable to a bug in its implementation of the H.323 Voice over IP (VoIP) standard. While the company has patched its Internet Security and ...

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 ...

Microsoft is still investigating which of its products are vulnerable to a bug in its implementation of the H.323 voice over IP (VoIP) standard. While the company has patched its Internet Security and ...

Testing your VoIP security system against all the threats that exist on the network can be a full time job. This guide documents how a VoIP system can be tested and suggest some of the available tools ...