TELECOM Digest OnLine - Sorted: Re: GSM Roaming

Re: GSM Roaming

{{{{{Welcome}}}}} (bhx@hotmail.co.uk)
Fri, 13 May 2005 23:38:50 +0100

Thus spaketh Graham Gower:

> 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?

> Graham

http://www.mobileshop.org/howitworks/roaming.htm

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