mark lewis wrote to Robert Bashe on Tuesday July 10 2018 at 08:36:

RB>> I use analog phons and have done so since I started telephoning. The
RB>> bare wires into the NTBA naturally give no dial tone,

ml> exactly and that's the whole point! it has been the whole point since
ml> i wrote my statement... a POTS line and standard POTS phone do not
ml> need any other equipment on the customer end... this distinction
ml> between dial tone on the bare wires is exactly one of the major
ml> distinctions between POTS and ISDN or other some digital services...
ml> DSL, for example, can run on either dry or wet pairs...

I don't know whether you or I am confusing things, but I have one line into my
office, and it carried bogh ISDN and DSL. Natuerally it has no dial tone, how
could it? A mix of DSL and ISDN wouldn't. But after the splitter and the
TK-equipment (I see it's called a "business telephone system" in English),
which translates the ISDN into analog signals for the phones, there is
naturally a dial tone. Now, whether that comes from the phones, the TK
equipment or from the phone company is something that I neither know nor
particularly care about.

Cheers, Bob

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