TELECOM Digest OnLine - Sorted: GSM Roaming

GSM Roaming

Graham Gower (
12 May 2005 20:31:01 -0700

Do switching centres lookup a person's phone in the local VLR before
searching for its HLR?

e.g., If my friend from Sydney calls me when I get off the plane
(at Sydney airport), does the switching centre realise that I'm
already connected to the local VLR, or will it try to find me
via my HLR instead?

Would this happen often enough for it to be a worthwhile optimisation?


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