DS EN 50377-8-7:2007 Connector Sets And Interconnect Components To Be Used In Optical Fibre Communication Systems - Product Specifications - Part 8-7: Lsh-Pc Terminated On Iec 60793-2-50 Category B1.1 And B1.3 Singlemode Fibre, With Full Zirconia Ferrule Category C Defines the initial, start of life dimensional, optical, mechanical and environmental performance requirements which a connector terminated with cylindrical Zirconia PC ferrule and assembled singlemod