2009/06 17 p.
The following aspects of IMS Centralized Services (ICS), though studied in Release 8 (and to some extent documented in TR 23.892
), required further study and are herein documented:
ICS supplementary service data management (e.g. Supplementary Services data synchronization).
Management of Telephony Application Server (TAS) user configuration for an ICS UE when PS access cannot be used.