On Mon, Aug 05, 2019 at 06:30:14PM +0200, Neels Hofmeyr wrote: > > IIUC, in the traditional core network. When an MSC receives a MO SETUP > > from a local MS, and it does not have this number in the VLR, it should > > be querying HLR for routing info, (which may subsequently query another > > HLR) no? why are we only doing VLR lookup in the MSC? Is it simply "To > > be implemented" ? > > Yes, these are leftovers of the OsmoNITB paradigm, being "I am the entire core > network". If a subscriber isn't attached, it doesn't exist.
Let me rephrase: back then the subscriber database was in the OsmoNITB and non-attached subscribers did exist. The inability to recognise unattached subscribers as existing crept in during the separation of the HLR. ~N
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