...
System was up and taking data. (Reporting about 1000 spurious interrupts per second, then later 500 after Chris replaced some TRHs). The pocketec disk has data files for April 28 to the present, so no loss of data. Could not ping manitou server, 192.168.100.1, at other end of fiber link. Power cycling the fiber/copper media converter at the tower did not help. In retrospect I should have also cycled power on the 5 port switch. Cycling power on the media converter in the seatainer also did not bring it back. Only the power LED was lit on the converter at the tower, not SDF (signal detect fiber), SDC (signal detect copper), or RXC/F (receive copper/fiber). I am not sure whether the SDC LED was on in the seatainer.
Site note: There is a heavy smell of what I believe is butanol in the seatainer where the turbulence tower fibers are terminated. This is the first seatainer as one drives into the site. There are several butanol bottles in that seatainer.
The manual for the converters (Transition Networks, model E-100BTX-FX-05) describes the dip switch options. I've cut and pasted some of the manual to the end of this entry. It seems that we should disable the pause control, link pass-through and far-end fault options on both converters. Link pass-through and far-end fault options can cause a copper interface to be disabled if a fault is detected on the remote copper interface or on the fiber. These options appear to be for a building network with good network monitoring equipment. Perhaps a power outage, cable disconnect, or powering down a network switch could cause the converters to think there is a fault in the copper line, and then the copper interfaces would be disabled. The manual says nothing about whether the interfaces are automatically brought up if the fault disappears.
...