Notification Bodies
Registration state changes are reported in XML attachments to NOTIFICATIONS generated by the S-CSCF. As shown above, the XML consists of one or more registration elements that report the state of a specific address-of-record. Attributes supported by the registration element are as follows:
aor contains the address-of-record
id identifies this specific registration
state reports the Registration state — init, active, or terminated
init — address-of-record not yet cached
active — address-of-record maintained in current cache
terminated — address-of-record removed from cache, not currently valid
registration elements, in turn, contain one or more child contact elements. Attributes supported by the contact element are as follows>
id identifies this specific contact
state reports the Contact state — active or terminated
event reports the event that generated the last state change — registered, created, refreshed, shortened, expired, deactivated, probation, unregistered, or rejected
duration-registered reports the length (in seconds) of the current registration
contact elements, contain a single child uri element that identifies the contact address of FQDN.