SIP Diversion to SIP-ISUP Interworking

For networks in which there are devices that do not support SIP-T or SIP-I (and support native SIP alone), the Oracle® Enterprise Session Border Controller now supports SIP Diversion interworking. This feature enables such devices to function properly in instances that require SIP-T/SIP-I style ISUP IAM message encapsulation in ISUP requests, and to receive any call forwarding information in the IAM according to ISUP standards.

The Oracle® Enterprise Session Border Controller interworks a native SIP INVITE request to SIP-T one by inserting an ISUP IAM body based on the INVITE; this includes redirections information based on the Diversion header. This feature can also perform the reverse translation. That is, it can interwork a SIP INVITE that does have the ISUP IAM body to a non-ISUP INVITE. In this case, the Oracle® Enterprise Session Border Controller generates the necessary Diversion headers based on the IAM’s Redirection information.