Thread: CharlieCards v.v. Oyster (and Octopus?)
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Old April 3rd 12, 06:28 PM posted to uk.railway,uk.transport.london,misc.transport.rail.americas
Adam H. Kerman Adam H. Kerman is offline
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First recorded activity at LondonBanter: Jan 2012
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Default Cell phones (was: Telephone line numbers, prefixes, and area codes)
wrote:

I'm not sure how the A/B switched worked.

They used different sets of channels in the 800 Mhz band.
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