Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Interworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networks (3GPP TS 29.163 version 9.26.0 Release 9)
The present document specifies the principles of interworking between the 3GPP IM CN subsystem and BICC/ISUP
based legacy CS networks, in order to support IM basic voice, data and multimedia calls.
Life cycle
NOW
PUBLISHED DS TS 129 163 V9.26.0:2019 60.60
Standard published Jul 16, 2019