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D-Link DGS-1250-28X and DGS-1250-52X: BiDi SFP OSNOVO detected, but link on one fiber won't come up
Servicing a small office network, two buildings linked by a single single-mode fiber that contractors pulled. The job was supposed to take half an hour: bring up a gigabit link between the switches in the two buildings. It's been two weeks and it still won't come up. What's installed: main…