I have a fiber run that will serve 3 buildings. One building, where fiber was merely being routed thru, now has a Catalyst 3750 for future users. I have installed the switch and have connected the fiber to 2 gig interfaces but I can't get the far side to light up. The port back to the ITN will link up, put the port meant to pass on data to the next building where I have current users does not. Please advise if this switch application is correct and if so where my interface config is going wrong. Thank you.