SIP Registration Event Package Support

The Oracle Communications Unified Session Manager supports UA subscriptions to the registration event package, as defined in RFC3680. As such, it maintains contact with entities, often application servers, that need to know about UA registration events and provides those application servers with notifications when registration events occur.

Common usage for this functionality includes:

Forcing re-authentication
The provision of welcome notices to users who need information or instructions customized to their location

An operational example, shown below, begins with the Oracle Communications Unified Session Manager performing 3rd party registration on behalf of a UA to an AS, based on the iFC request from the UA. The AS, being an appropriately authorized UA itself, subscribes to NOTIFY messages on reg events for the initial UA. The Oracle Communications Unified Session Manager sends a 200OK to the AS, and then proceeds to forward NOTIFY messages about that UE’s registration events to the AS.

This image depicts the OCUSM or OCCSM subscribing to a UE's registration events.

This feature is relevant when the Oracle Communications Unified Session Manager is performing S-CSCF functions. You enable this feature on the Oracle Communications Unified Session Manager per registrar, by simply creating a profile and applying it to the applicable registrar.