1.4 Transfer of information from HLR to VLR

23.0843GPPMulti Party (MPTY) supplementary serviceRelease 17Stage 2TS

If the provisioning state for MPTY is "Provisioned" then, when the subscriber registers on a VLR, the HLR shall send that VLR information about the logical state of MPTY.

If the logical state of MPTY is changed while a subscriber is registered on a VLR then the HLR shall inform the VLR of the new logical state of MPTY.