Traditionally, as DSX frameworks grew, DSX chassis and the jumper rings associated
with them were added one by one. Existing cross-connect jumpers had to be fed into
the new jumper rings as the new chassis were installed. Jumper movement in any one
direction was often restricted since jumper rings were not present at unequipped chassi
positions. If jumpers were pulled too tightly across unequipped positions, feeding them
into new rings was difficult if not impossible. Also, jumpers may have cut across corner
as they transitioned from vertical to horizontal wireways....