Alterations to SIP REFER

The original implementation of the SIP REFER feature made available in Oracle® Enterprise Session Border Controller Release S-C6.0.0 resulted in instances where SDP parameters were not being communicate properly. Issues arose when the Oracle® Enterprise Session Border Controller maintained the original dialog with the user agent that did not support REFER and failed to communicate and SDP changes to that endpoint.

The alterations to SIP REFER made available in Oracle® Enterprise Session Border Controller Release S-C(X)6.1.0M2 solve those issues. Now, the Oracle® Enterprise Session Border Controller sends re-INVITE with the negotiated SDP to the user agent for which the Oracle® Enterprise Session Border Controller performs the call transfer.