1985– IBM announced, with co-developer Texas Instruments, the Token Ring network along with PC Network software – six months ahead of schedule. The TR only did network transmission speed of 4 Mbps (It didn’t hit speeds of 16 Mbps until 1989), and worked over standard phone wiring. Using terminated BNC cable, Token Ring created just that; a Ring connection that talks in one direction. This Day in Tech History podcast show notes for October 15 Mac Plus Retires, Mac Classic Launches John Sculley resigns from Apple AOL Lays off 20%