Everything there is to find on tag: ISDN.
KPN quits ISDN after almost 30 years and starts closing lines.
KPN has started to shut down most ISDN lines. ISDN was introduced almost thirty years ago and made it possible...
Everything there is to find on tag: ISDN.
KPN has started to shut down most ISDN lines. ISDN was introduced almost thirty years ago and made it possible...