Hello Markus,

On Tuesday March 28 2017 12:39, you wrote to me:

 MvdV>> But it is technology on the way out. Telcos are converting from
 MvdV>> POTS/ISDN to VOIP and very few offer ISDN emulation and if they
 MvdV>> do, it is seldom a complete emulation.

 MR> ISDN is marked EOL ;) Deutsche Telekom is migrating ISDN to VoIP and
 MR> plans to shut down ISDN end of next year.

KPN (the old incumbent) has not mentioned an explicit date, but it is clear
that they will fase out ISDN. No more new connections.

 MR> A few telcos keep running ISDN for some time longer but the technology
 MR> was phased out by manufacturers. So there aren't any spare parts
 MR> besides what's left in your warehouse. My guess is that ISDN will be
 MR> history in about 5 years.

And then the FTSC can stop documenting it...

 MR> For ISDN (X.75) over VoIP you can use RFC4040 (clear mode). AFAIK the
 MR> most inexpensive device supporting that is the FritzBox.

X75 over VOIP makes little or no sense to me. To me it looks like putting a man
on a horse on a trailer behind a car. Perhaps useful if one wants to ride in an
area too far away for the horse to get their on itsown power, but if you just
want to get the man from A to B, forget about the horse and the trailer and
just have the man sit in the car...

I still see X75 flags in the German, Austrian and Swiss part of the Nodelist.
But not much in the rest of the world. In R28 it has been gone for several
years. The system of Kees van Eeten was the last to fly an X75 flag. Something
broke and as he no longer had ISDN callers, he did not bother to repair it.


Cheers, Michiel

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