31 Restricted Local Operator Services (RLOS)

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

Based on inter-operator agreement, RLOS as described in 3GPP TS 24.229 [5] may be supported over the roaming II-NNI.

If RLOS is supported, a REGISTER request with a "+g.3gpp.rlos" Contact header field parameter, as defined in 3GPP TS 24.229 [5] clause 7.9.9 shall be supported at the roaming II-NNI.

An initial request for a dialog or a request for a standalone transaction with the Request-URI containing the dummy MSISDN value as defined in 3GPP TS 23.003 [35] or a RLOS service specific dial string and a P-Preferred-Service header field set to "urn:urn-7:3gpp-service.ims.icsi.rlos", as defined in 3GPP TS 24.229 [5] clause 7.11.2 shall be supported at the roaming II-NNI.