I have 2 floors that need to connect to each other. I have fiber conduit running between them.
I have a pair of media converters which translate ethernet to fiber and vice versa.
I also have Cisco switches with SFP - GLC-SX-MMs on either end.
A laptop connected to a media converter over ethernet on one floor can talk with a laptop connected to the other media converter over ethernet on the other floor. The cables connecting the media converters to the fiber conduit are ST ended and have the following markings: Orange cable: BERK-TEK OPTICAL FIBER CABLE - 62.5/125 - ICR0X0 - FDDI TYPE OFNR (UL) CSA OFN FT-4 75C 04/94 079636 FEET.
However, I cannot get a laptop connected to a media converter on one floor to talk with the switch connected on the other floor over an LC-ST-MM cable into the with the following markings: Orange cable: CORNING OPTICAL FIBER 62.5/125 MM-2. O*4. 1 04/2013 FIBER OF (UL) OFNR ROHS 00683M
The first scenario has the same kind of cables on both floors. The second scenario has the 2 kinds of cables - one from scenario one and the other from senario two.
I've swapped out cables, had the fiber panel connectors cleaned and refitted (which helped lessen the dB variation) and even swapped out the SFP - GLC-SX-MMs and their respective ports. I still cannot get this to work.
Any viable ideas will be much appreciated.