ETSI - TS 129 235
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Interworking between SIP-I based circuit-switched core network and other networks
|Publication Date:||1 August 2020|
The present document specifies the interworking between SIP-I based circuit-switched core network, as specified in TS 23.231  and TS 29.231 , with out-of-band transcoder control related procedures in TS 23.153 , and:
- an external SIP-I based signalling network compliant to ITU-T Recommendation Q.1912.5 ,
- an ISUP (ITU-T Recommendations Q.761 to Q.764 ) based network such as an ISUP based 3GPP CS Domain or a PSTN,
- a BICC (ITU-T Recommendations Q.1902.1 to Q.1902.6 ) based network such as an BICC based 3GPP CS Domain as specified in TS 23.205  and TS 29.205 ,
- an IP Multimedia Subsystem, as specified in TS 23.228  and TS 24.229 .