From mboxrd@z Thu Jan 1 00:00:00 1970 From: andreww591@gmail.com (Andrew Warkentin) Date: Thu, 30 Jun 2016 04:30:15 -0600 Subject: [TUHS] A Talk on Early Unix In-Reply-To: <201606300710.u5U7AnW5019439@freefriends.org> References: <20160630065609.GA20869@minnie.tuhs.org> <201606300710.u5U7AnW5019439@freefriends.org> Message-ID: 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.