i have a new office going into a large building. this office will connect to our network via a t-1. the qwest demarc is 500 feet away from where the router will sit and the contractor is pulling 6 strands of multimode. my question is should i use a media converter to go from copper to fiber and back to copper at the router and into the wic-dsu-t1-v2?

any other suggestions would be great - this is the first time i've had to use fiber so it's new to me.

thanks in advance.