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 ...

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 ...

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 ...

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 ...

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 ...

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 ...