In article , Martin Rich
writes
According to the BT archives, the handful of A/B button
phones in Scotland survived because they used radio links which didn't
support the meter pulsing necessary for the pay-on-answer phones.

Could it be that A/B phones could only be used for local calls?

There was a time in the mid-1970s when some rural exchanges still didn't
have Subscriber Trunk Dialling when most places did. I remember seeing a
placard in a phone box saying that local calls were 2p unlimited if STD
was not available, or 2p per [3 minutes, I think] if it was.

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Clive D.W. Feather | Home:
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