56k modems didn’t always negotiate to the full 56k. The handshaking allowed connections at much slower speeds. It depended on the quality of the line. This is the US - we didn’t have ISDN, at least no one I knew had it in 1996.
ISDN was available near me in 1996 (Southern California, Pacific Bell) ... but nobody I knew had it. It cost a lot for the install and monthly, and there was no unlimited local calls tariff like there was for a regular "analog" lane. You'd have to be pretty serious to want that.
strikefo · · focus · HN ↗
aduty · · focus · HN ↗
stingraycharles · · focus · HN ↗
iirc ISDN did require a special phone line, but 56k was fine over regular lines.
TedDoesntTalk · · focus · HN ↗
toast0 · · focus · HN ↗