Part 1 explained why firewalls break video conferencing calls. This Polycom's Real Presence Access Director provides scalable and secure firewall traversal solution that enables seamless video collaboration across business-to-business and intra-company networks for H.323 and SIP devices, including new Polycom SVC solutions. How does it work?
The RealPresence Access Director (RPAD) system is a software based edge server that securely routes communications, management and content through firewalls without requiring additional client hardware or software--it securely fixes what your firewall would otherwise be stopped.
It lets your IT team enable employees to securely and transparently access video services and collaborate with colleagues and customers as if they were inside the network. It opens up secure connections to RealPresence Distributed Media Appliance (DMA) and RealPresence Resource Manager. In the same way your corporate phone system is connected the public telephone network, the RPAD securely connects your internal video network to the ouside world--calls (and only calls and related traffic) can go from inside to outside, and the reverse. There is no need for dedicated VPN for this traffic.
Much in the same way a data firewall looks at web and mail traffic, the RPAD is a specially designed firewall that looks at the voice, video and related traffic passing through the firewall and determines whether it's safe.
There are three main deployment scenarios depending on your firewall configuration, security needs, and preferences.
RPAD is licensed by the number of concurrent calls that are supported, from 25 to 1000 per unit. It supports both H.323 and SIP signalling, as well as secure support for H.264 AVC and SVC media traffic.