I just tried installing a TEK4105 as a terminal on serial port 1 using the icon-driven system manager. The terminal didn't work, so I reverted to the 3.1 manual, and found 2 discrepancies: 1. In /etc/ttytype, the entry was ?tek4105 ttyd1. I removed the ?. 2. In /etc/inittab, the entry was t1:23:.... I changed 23 to 2. After I did this, the terminal worked fine.