Optical cord (patch-cord) single (simplex) or double (duplex) pass-through unimode (with fibres G652D, G657A1, G657A2, G65). Optical cord (patch cord) single (simplex) or double (duplex) transitional single mode (with fibres G652D, G657A1, G657A2, G6) Optical cord (patch cord) single (simplex) or double (duplex) pass-through single mode FOPS-SX (DX)-ST/UPC-ST/UPC-SM Optical cord (patch cord) single (simplex) or double (duplex) pass-through single modem with connectors (FOPS-SX (DX)-SC/APC-SC/ Optical cord (patch cord) single (simplex) or double (duplex) pass-through single modem with FOPS-SX (DX)-FC/APC-FC/A connectors Optical cord (patch cord) single (simplex) or double (duplex) pass-through single mode FOPS-SX (DX)-SC/UPC-SC/UPC-SM Optical cord (patch-cord) single (simplex) or double (duplex) pass-through unimode (with fibres G652D, G657A1, G657A2, G65). FOPS-12DB-12MPOm/APC-12E2000/UPC-SM Optical cord (patch cord) single (simplex) or double (duplex) transitional single mode (with fibres G652D, G657A1, G657A2, G6) Optical cord (patch cord) single (simplex) or double (duplex) pass-through multimode (with OM1, OM2, OM3, OM4, OM5 fibres) Optical cord (patch cord) single (simplex) or double (duplex) pass-through multimode (with OM1, OM2, OM3, OM4, OM5 fibres) Optical cord (patch cord) single (simplex) or double (duplex) transitional single mode (with fibres G652D, G657A1, G657A2, G6)