ITU-T Recommendations

Recommendation ITU-T H.460.22 defines a security negotiation mechanism for ITU-T H.225.0 call signalling. The negotiated security mechanism between two entities is to be applied for ITU-T H.225.0 call signalling messages before initiating a call establishment procedure. Detailed negotiation procedures, which provide the necessary security interoperability among ITU-T H.323 systems, are specified in this Recommendation. The syntax of the security capability parameters in call signalling messages is also specified.
This revision includes procedural clarifications and introduces support for ITU-T H.460.18 and ITU-T H.460.19 NAT traversal and negotiating datagram transport layer security (DTLS) for ITU-T H.323 Annex E over UDP transport.