From mboxrd@z Thu Jan 1 00:00:00 1970 From: cym224@gmail.com (Nemo) Date: Thu, 30 Jun 2016 10:11:50 -0400 Subject: [TUHS] A Talk on Early Unix In-Reply-To: References: <20160630065609.GA20869@minnie.tuhs.org> <201606300710.u5U7AnW5019439@freefriends.org> Message-ID: On 30 June 2016 at 06:30, Andrew Warkentin wrote: > On 6/30/16, arnold at skeeve.com wrote: >>> For example, I thought Unix was used at some point as the OS for some >>> of the ESS switches in AT&T, but now I think I was mistaken. >> >> I think that your initial statement is correct. At Georgia Tech AT&T gave >> us some 3B20s - vax size and larger, running System V, and I remember some >> discussion that they were used inside AT&T as switches. >> >> This, of course, is second hand information; perhaps some of the Bell Labs >> alumni can verify for real. >> >> Arnold >> > > AFAIK the later ESS switches include a 3B machine but it only handles > some administrative functions, with most of the the actual call > processing being performed in dedicated hardware. I feel dated: 2ESS was just coming in and offices had Strowger switches when I left that field. Wikipedia (https://en.wikipedia.org/wiki/5ESS_Switching_System) claims that 5ESS ran under UNIX-RTR. N.