[ih] X.25

[William Westfield]

> More interesting [than x.28/29 PAD] would have been a [x.25] packet interface, as you then cite.

Sure, but there were any number of services (tymnet, telenet) offering local-dialup PAD connections as a substitute for long-distance modem connections.  AFAIR, direct X.25 connections (which would have required synchronous “leased lines”) were relatively rare.  (I mean, ARPANet started to use them as they become more available.)

(also, X.25 host interfaces would have been rare and expensive compared to the dialup async that were already there.)

BillW