Rapporteur: Mr. Bertenyi, Balazs See also:
ETSI (TISPAN) ES 282 007TS 23.517
This TS describes the IP Multimedia Subsystem (IMS) core component of the TISPAN NGN functional
architecture and its relationships to other subsystems and components.
Use of IMS functional entities in support of transit scenarios is incompletely described. Completion of this description is dependent on ongoing work in 3GPP.
Note: 3GPP SA2 is working on a solution for IMS transit, according to an agreement between TISPAN and
3GPP. When ready, that solution will replace any solution documented by TISPAN in case of
discrepancy. The affected IMS functional entities, and the way they perform transit routing, may also be
different in the SA2 solution than what is documented in the present document. The SA2 solution will be
added to the TISPAN Release-1 documentation.