[TUHS] X.25 stacks on Unix

Rudi J. Blom rudi.j.blom at gmail.com
Thu Jun 12 12:46:18 AEST 2025


Greg,

a long time a go while still working for Computer Division of Philips
Electronics I used X.25 and X.21 extensively on various proprietary
O.S.-es. X.25/X.21 (or PSDN/CSDN) was used for Teletex (CCITT T series,
TTX, better than telex but lost to FAX which was easier, cheaper and
legally acceptable).

I still have some dedicated boards which Philips used for X.25, X.21 and
SDLC. At a customer side in a test environment with SCO UNIX 3.2V4.2 SDLC
links are still used, X.25 was phased out a few years ago. Same with DEC
Tru64, a multi-port SYNC-2000 with appropriate DEC software could support
both X.25 and SDLC. AlphaServer DS25 with SDLC links still in production.

I still have all the applicable software for SCO UNIX and DEC Tru64.

Cheers,
uncle rubl
-- 
The more I learn the better I understand I know nothing.
24 x 7 is not enough but my request for 25 x 8 is still under consideration.
24 x 7 is not enough but my request for 25 x 8 is still under consideration
24 x 7 is not enough but my request for 25 x 8 is still under consideration
24 x 7 is not enough but my request for 25 x 8 is still under consideration
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