Contact Header URI Replacement
When no GRUU is encountered in the contact header, and when a SIP message is forwarded to the egress realm, the contact header’s URI is replaced with the Oracle® Enterprise Session Border Controller’s egress interface. For example:
![](img/GUID-C96AB12D-B50E-41DB-84C7-906F1C9D1E10-default.gif)
When the Oracle® Enterprise Session Border Controller forwards a request where the original Contact header contains a GRUU, the contact header’s URI is forwarded unchanged on the egress side of the call. For example:
![](img/GUID-DBB07E00-EE36-45A8-B5E8-9B03FF1B2BC2-default.gif)