ITEM CONSISTS OF 20 KILOMETERS OF 50 MICRON MULTIMODE OPTICAL FIBER WITH KNOWN FEATURES AT KNOWN LOCATIONS. FIBER IS TERMINATED WITH AN ST/PC PIGTAIL FUSION SPLICED AT BOTH ENDS. THE ENTIRE ASSEMBLY IS SITUATED IN A SEALED CONTAINER WITH THE FIBER OPTIC CONNECTOR EXTERNAL. USED AS A DUMMY LOAD. END ITEM IS THE TS-4320(P)/G. NSN 6625-01-355-4087.