EFB-Elektronik LC-LC Duplex Fibre Optic Patch Cable, OM4 multimode 50/125µm, LSZH 2mm, 1m, Violet

The EFB-Elektronik O0319.1 is a 1 m duplex OM4 multimode 50/125 µm fibre optic patch cable with LC connectors on both ends, for linking switches, servers, media converters and patch panels in racks and comms rooms.

OM4 is the higher-bandwidth grade of 50/125 µm multimode fibre, recognised by its heather (erica) violet jacket. It uses the same 850 nm SR optics as OM3 but reaches further: IEEE specifies OM4 for 10GBASE-SR up to 400 m and 25GBASE-SR up to 100 m.

• 1 × LC-LC duplex patch cable, 1 m
• 2 × duplex clips
• 1 × individual measurement report
• 1 × information sheet

• At 1 m it suits patching inside one rack: switch to patch panel, or server to top-of-rack switch.
• Duplex means two fibres in one cable: one carries transmit and the other receive, so one cable completes one link between two transceivers.
• The LSZH (low smoke, zero halogen) jacket is the usual requirement in offices, data centres and public buildings: in a fire it gives off little smoke and no corrosive halogen gas.
• Keep the end faces covered until you plug in: a dirty connector is the most common reason a new fibre link does not come up.

• Single-mode optics (LX, LR, ER at 1310/1550 nm): they need an OS2 single-mode cable, not multimode.
• SC or ST ports, or a mix of connector types: this cable is LC on both ends.
• Copper RJ45 ports: fibre needs an optical transceiver or a media converter at each end.
• MPO/MTP ports (40G/100G SR4 parallel optics): they use multi-fibre trunk cables, not duplex patch cords.