22 Delivery of original destination identity

29.1653GPPInter-IMS Network to Network Interface (NNI)Release 18TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

Based on inter-operator agreement, the procedure to deliver original identity may be supported over the II-NNI.

NOTE: Service requirement related to the procedure is available in 3GPP TS 22.228 [9].

If the procedure to enable delivery of original destination identity is supported, the procedures in 3GPP TS 24.229 [5] shall be supported as further specified below.

The "mp" header field parameter in the History-Info header field of the initial INVITE request, as defined in IETF RFC 7044 [25], shall be supported over the II-NNI.