mark lewis wrote to Michiel van der Vlist on Sunday July 08 2018 at 06:57:

MV>> Of course. When POTS was the only game in toen, there was no need tp
MV>> explicitly call them POTS mailers. That addendum only came after POTS
MV>> was the only game in town.

ml> that would be when ISDN came around... ISDN doesn't have a dial
ml> tone... dial tone is what distinguishes a POTS line from any other...

Maybe in the States, but certainly not here in Germany. I get a dial tone on my
ISDN line every time I pick up the phone.

Cheers, Bob

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