CDDI

from The Free On-line Dictionary of Computing (8 July 2008)

Copper Distributed Data Interface
CDDI

   (CDDI) {FDDI} running over conventional copper cables.  A
   {Cisco}/{Crescendo} copyright term(?).  All {FDDI}
   connections, {single-attached} or {dual-attached}, can be
   either {optical fibre} or copper.

   (1994-12-14)