Fiber Loop Converters are sometimes required to operate over multimode fiber because
an existing span of installed multimode fiber may already be in place between two points
requiring FLC transmission. The FLCs were designed for use over singlemode fiber, and
if there is a choice, singlemode fiber should be installed. However, FLC operation over
multimode fiber is possible and, in fact, is a functioning application with several customers.
LAN applications over short distances have been successful. The following aspects of
this application require attention....