11 Dec
2021
11 Dec
'21
2:44 a.m.
On Fri, Dec 10, 2021 at 3:18 PM Paul Koning <paulkoning at comcast.net> wrote:
I don't know that VMS ever did it, but a number of
DECnet systems support
DDCMP over async lines (terminal serial ports). That's part of the
standard.
DECnet-VAX implemented dynamically switching a terminal line to DDCMP
around 1985-1986. The DCL command was something like SET
TERMINAL/PROTOCOL=DDCMP. The idea was to dial into the VAX via modem line,
login, then issue the SET command to start DDCMP. The first release or two
of VMS to implement this was buggy in ways that annoyed a certain NYC-based
customer whom I had to support. ;-)
Bob Leigh
(NY/NJ SWS 1982-1987)