This Recommendation extends H.323 to enable H.323 devices to successfully exchange signalling and... more This Recommendation extends H.323 to enable H.323 devices to successfully exchange signalling and establish calls, even when they are placed inside a private network behind NAT/FW devices. These extensions, when used together with the facilities of H.460.19, enable H.323 endpoints to traverse NAT/FW installations with no additional equipment on the customer premises. Alternatively, the H.460.18 extensions may be implemented by a proxy server to support unmodified H.323 endpoints.
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