So you are from Germany? :) nobody else invested in ISDN. Whats more US ISDN was incompatible and incumbent telcos fought hard against implementing anything all

So you are from Germany? :) nobody else invested in ISDN. Whats more US ISDN was incompatible and incumbent telcos fought hard against implementing anything allowing users faster speeds without bigger bills https://yarchive.net/phone/isdn_politics.html https://yarchive.net/phone/isdn_politics.html