ITU-T H.460.23-2009 PDF

Scope: This Recommendation defines the capability and procedures for determining whether an endpoint is located behind a network address translator (NAT) or firewall (FW) and to determine the characteristics of the NAT/Firewall device. This feature detects the NAT/Firewall characteristics in order to allow a gatekeeper to determine whether it is possible to stream media directly between two endpoints. If used in conjunction with [ITU-T H.460.24], the scalability of [ITU-T H.460.18]/[ITU-T H.460.19] may be extended to allow media to flow directly between ITU-T H.323 endpoints, thus avoiding the necessity to proxy media through an ITU-T H.460.19 server.

ITU-T H.460.23-2009 Referenced Document

ITU-T H.225.0-2009 Call signalling protocols and media stream packetization for packet-based multimedia communication systems (Study Group 16)
ITU-T H.245-2009 Control protocol for multimedia communication (Study Group 16)
ITU-T H.323-2009 Packet-based multimedia communications systems (Study Group 16)
ITU-T H.460.1-2002 SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Supplementary services for multimedia Guidelines for the use of the generic extensible framework Study Group 16
ITU-T H.460.17-2005 Using H.225.0 call signalling connection as transport for H.323 RAS messages Study Group 16
ITU-T H.460.18-2005 H.323 Signaling Overcoming Network Address Decoders and Firewall Barriers Research Group 16
ITU-T H.460.19-2005 Traversal of H.323 media across network address translators and firewalls Study Group 16
ITU-T H.460.24-2009 Point-to-point media through network address translators and firewalls within ITU-T H.323 systems Study Group 16

2009 ITU-T H.460.23-2009 Network address translator and firewall device determination in ITU-T H.323 systems Study Group 16