Sun 3/E reports sun2-keyboard, but it is happy with sun3 db15 keyboard
On Friday, October 29, 2021, Michael Thompson via cctech <
cctech at classiccmp.org> wrote:
 
 AFAIK, the posts are there so you don't plug your mouse into a phone
 jack or a modem port.  There are cutouts on the back of the Sun3
 keyboard to admit that connector.
 
 My Sun 2/120 server has an RJ mouse connector next to the RJ keyboard
 connector on the back of the chassis.
 My Sun 2/50 desktop client has a DA-15 keyboard connector on the back and
 has the mouse plugged into the keyboard.
 I have a black Mouse Systems mouse with a Sun sticker on the front. P/N
 900783-002/01. Maybe for a Sun-1?
 --
 Michael Thompson