POTS; was: Anyone here from Oregon USA to help with collection pickup?
Gordon JC Pearce
gordon at gjcp.net
Tue Oct 10 15:40:19 CDT 2006
Alexey Toptygin wrote:
> On Mon, 2 Oct 2006, Sean Conner wrote:
>> But what about cell phones and roaming? Last year I went to Las Vegas
>> with a friend of mine. My cell phone is in the 561 area code (Palm Beach
>> County), my friend's phone is in the 205 area code (Tuscaloosa, Alabama).
>> Las Vegas is 702. My Dad was able to call me (760) while I was in Las
>> Vegas, and I was able to call my friend (205 area code, although
>> five feet away) from my cell phone.
>> How do they handle *that*?
> This is getting dangerously OT, but what the hell, I used to test these
> things :-)
> All calls from the PSTN to a particular cell number go to that number's
> 'home' switch. This switch owns the enclosing block of numbers in the
> PSTN sense. It also keeps track of which switch is the 'serving' switch
So there's no real way to distinguish between a mobile phone and a landline?
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