Atlanta Open House Tomorrow

There are a couple of 56K-xxx AT&T keyboards there, but I counted, and there are only 6 wires in the female connector. There is not a fixed cable. -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Ethan Dicks Sent: Thursday, August 11, 2016 8:25 AM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Atlanta Open House Tomorrow On Wed, Aug 10, 2016 at 8:15 PM, Al Kossow <aek at bitsavers.org> wrote: Likewise, I'm looking for a couple of AT&T/Teletype keyboards for my 5620/Blit and my 730+. They do _not_ have a round DIN plug, which distinguishes them from 98% of what's out there. They have an 8p8c connector ("RJ-45"). There are several matching keyboards with different numbers of keys (~98-103). 56K-341-AAN is one part number. Keyboards that will work are the same ones used on the AT&T 4410 and Teletype 5410 terminal. I'm also seeing part numbers in the technical drawings (http://www.brouhaha.com/~eric/retrocomputing/att/5620/att5620_eng.pdf pp 87-95) like: 56K224 56K229 56K230 410896 410967 It appears to have 6 of the 8 pins in use - serial in, serial out, +5V, -12V, signal GND, and frame GND (it makes its own -5V for the MCU One is good. Two is better. Thanks, -ethan