I sent a friend a setup to run fiber from his house to his detached garage. Along with the terminated fiber, I sent him 2 Digi MIL-140 media converters. I tested the setup completely before I sent it to him, and he installed everything with no problem. Shortly (2-3 hours?) after his system was up and functional, it locked up on him.

The MIL-140 in the garage is showing a "Collision UTP" red light (which I guess would be losing link on RX), while the one connected to his router (D-Link DIR-655) is not showing any collision.

Should we set the dip switches 2 & 3 on the second unit (garage) to the down position? I can't recall ever having to mess with the dip switches on these, but it's been a while since i worked with them.