Adding the Reason Header To enable the Oracle® Enterprise Session Border Controller to add the Reason header: In Superuser mode, type configure terminal and press Enter. ORACLE# configure terminal Type session-router and press Enter. ORACLE(configure)# session-router Type sip-config and press Enter. ORACLE(session-router)# sip-config ORACLE(sip-config)# add-reason-header—Enable this parameter to add the Reason header. The default value is disabled. The valid values are: enabled | disabled Save and activate your configuration for changes to take effect.