I'm helping out my family's church with their networking. When they first installed their current network, they went with 10/100 fiber/ethernet converters, and now we're working on getting everything up to gigabit.

The problem is that I never work with fiber (most of my clients don't need such distances). I've attached a photo of the current product in place. I had the church order two of these to replace the current adapters.

When I went to install the new ones, the plugs at the end of the fiber cables just didn't seem to fit into the new converter. The outlets seemed to shallow. Did I order the wrong equipment? What's the right one?

Thanks for your help.