H.245

When in H.245 proxy mode, the Oracle® Enterprise Session Border Controller proxies or passes through the call signaling (H.225) messages and the call control (H.245) messages. It allows media to flow between the two H.323 endpoints, as shown in the following diagram.

In some deployments, the media might be treated by a NAT device. When the Oracle® Enterprise Session Border Controller is in H.245 proxy mode, any tunneled H.245 message on the ingress side is tunneled in the egress side. However, if the tunneling is refused on the egress side, a separate H.245 session is established.

H.245 proxy mode support is defined in the following table.

Ingress	Egress
Tunneled	Tunneled
Tunneled	Separate H.245 session
Separate H.245 session	Tunneled
Separate H.245 session	Separate H.245 session