I have a Cisco 2950 switch with a dead fan in it. I am replacing with another Cisco 2950 switch. Both are 24 port switches. The difference is, the old switch has built in Gigabit fibre ports(25&26), that fibre goes from the fibre box directly into the switch using a SC to ST fibre patch cable. The new switch has Gigabit fibre ports(25&26), but it requries the GBIC cards to plug the SC to SC fibre patch cable to work. My problem is this: When I plug the SC from he the Fibre box to the new GBIC Switch, I get no data light, period. I have tried swapping switches, gbic cards, sc-sc cables, etc. The output from the fibre box is good and working now, so I know the fibre isn't bad. I am using the same two fibre strands from the fibre box to the new switch, just with a sc-sc cable because a sc-st is now being used. What am I missing?