Interworking between SIP-I based circuit-switched core network and other networks
The present document specifies the interworking between SIP-I based circuit-switched core network, as specified in TS 23.231 [3] and TS 29.231 [4], with out-of-band transcoder control related procedures in TS 23.153 [5], and:
- an external SIP-I based signalling network compliant to ITU-T Recommendation Q.1912.5 [6],
- an ISUP (ITU-T Recommendations Q.761 to Q.764 [7]) 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 [8]) based network such as an BICC based 3GPP CS Domain as specified in TS 23.205 [9] and TS 29.205 [10],
- an IP Multimedia Subsystem, as specified in TS 23.228 [11] and TS 24.229 [12].