🚀 go-pugleaf

In article <4dxpLbK00VsaE=uz...@andrew.cmu.edu> "Joseph M. Newcomer" <jn...@andrew.cmu.edu> writes:
>Before the days of the TTY33 (the cheapo model) there was the virtually
>indestructible TTY35.  Back at CMU, the G-20 was accessed by dozens of
>TTY35s scattered over the landscape.
>
>To avoid penetration by hackers, each TTY35 had an answerback drum; the
>G-21 front end would send a ^E (ENQ), and if the answerback wasn't right
>(it said CIT G-21 TTYnn, or something like that, but had some non-printing
>control characters interspersed)  (CIT == Carnegie Institute of Technology,
>the original name of what became known as Carnegie-Mellon University, now
>Carnegie Mellon University.

The modems (separate boxes from Ma Bell with telephone attached) could
be used to call other Teletripes and what you typed would print on
both machines.  An uncoroborated story I heard was that someone got
Alan Perlis's phone number (Perlis was then the head of the CS Dept
and rated a home TTY).  He called Perlis's machine, and started
sending form feed characters to it.  Perlis was at home at the time
and had the presence of mind to type CTRL-E and got the remote's
answer back drum to identify the miscreant.  A phone call to the
security office and a rent-a-cop walked the 50 feet to the terminal
room and took care of the problem.

Personal to Joe:
!@%@$% quit triggering old memories!  I have work to do!  Type "u" now!
-- 
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