The PSB/SPSB is used in conjunction with an OTDR and covers the OTDR's dead zone, enabling loss measurement on the first and last connections of a fiber under test. Available as modular FTB-LTC, portable SPSB (soft bag) and stand-alone PSB, in singlemode and multimode versions and in lengths of 15, 150, 300, 500, 1000 and 2200 m. See spec sheet for ordering codes and connector options.