Telecom Convertors for DS1/DS3 signals

[Devon True <devon+nanog () noved org>]

All:

I am looking for recommendations for devices that can take a DS3 signal 
from a carrier via coax, convert it to optical so I can use fiber across 
buildings to transport the signal, and then on the other side, demux the 
DS3 signal to individual DS1 channels and terminate them on a RJ-48 
port. Any suggestions? I am only looking at one DS3's worth of data to 
transport across buildings. Distance is around 1000 feet.

Thanks!

Devon