I found a couple of cables with the cable checker and have not been able
to find out what these things are. Both ends are terminated with RJ-45
connectors, and the cable checker has pins 1 & 8 (blue/black) and 2 & 7
(yellow/orange) shorted together. They have a tag labled "IBM P/N
58X9806". One of them has a date of March 1990; anyone know what these
things are used for? Thanks!