On: ISDN: The Untravelled Path of Mobile Computing (2015)

[pantalaimon]

ISDN was pretty prevalent in Germany, but it always would cost a premium compared to POTS

[LargoLasskhyfv → pantalaimon]

Not really true from the times I remember, because heavily subsidised.

[wink → LargoLasskhyfv]

I don't remember the base price, but I'm pretty sure for Telekom there was like a 5-10 DM premium for ISDN over analog, at least in 98-2000