The first three Macs had this jack in the front for the keyboard and a PC-like serial port in the back for the mouse. With the Mac SE and II, the switched to ADB, which looked like a PS/2 port, but you could daisy chain your mouse, keyboard, and other inputs like tablets or joysticks all into one jack in the back of the computer.
In my day, the RJ-11 jack was for connecting the keyboard, not the phone line.
Okay that’s something I had no idea about hahaha
The first three Macs had this jack in the front for the keyboard and a PC-like serial port in the back for the mouse. With the Mac SE and II, the switched to ADB, which looked like a PS/2 port, but you could daisy chain your mouse, keyboard, and other inputs like tablets or joysticks all into one jack in the back of the computer.
I remember those days.