I have a cust. who has two blgs about 4500 feet apart. Obviusly we arn't going to run 18 gauge 100 pair cable that length. What we want to do is run a 12 strand fiber between both facilities to supply for their voice and data needs. It would be the Magix at both ends. Avaya sells a piece of equipment that will convert fiber to a T1. The cost is $1500 a unit. Anybody know about anything that can so this that will support B8ZS and ESF?