Ah, you are so right John. Must be my old age.
I seem to remember him saying that they could
use a lower-grade circuit, but that was over
fifty years ago. Thanks for the info.
Mike
John R wrote:
> You wrote "the lines didn't have to carry DC"
>
> Not true.... :-))
>
> All local phone lines have DC on them.... 48 Volts.
> That's what powers the touch tone pad and makes the phone work.
> The loop current on the line when "Off Hook" is about 20 Ma and the line
> voltage
> drops to about 6 - 8 volts. depending on the resistance of the cable
> pair to the local office
> or remote unit.
>
>
> 73 John (Bell guy , retired)
>
>
>
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