... brand and specializing in R&D, manufacture and sales of fiber optical communications equipments. YHT was establish in 2003, and grow ... coupler,5, Attenuator,6, Optic media converter,7, Optic splice closure,8, Optic terminal box,9, ODF (patch panel)etc. which ... are widely used in telecommunications, broadband, broadcast, CATV and network industry. All the products acquired the approval of ...