H.460
Encyclopedia
H.460 is a series of extensions to the H.323
H.323
H.323 is a recommendation from the ITU Telecommunication Standardization Sector that defines the protocols to provide audio-visual communication sessions on any packet network...

 videoconferencing standard from the ITU. Introduced in 2005, several of the extensions, including H.460.17, H.460.18 and H.460.19, deal with firewall
Firewall (computing)
A firewall is a device or set of devices designed to permit or deny network transmissions based upon a set of rules and is frequently used to protect networks from unauthorized access while permitting legitimate communications to pass....

 and NAT traversal
NAT traversal
NAT traversal is a general term for techniques that establish and maintain Internet protocol connections traversing network address translation gateways. Network address translation breaks end-to-end connectivity. Intercepting and modifying traffic can only be performed transparently in the...

. For example, they enable end points to communicate with each other without the need of intermediate nodes.
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