Good Connections OM4 Fibre Patch Cable LC/UPC to LC/UPC Duplex Uniboot 50/125 µm Multimode, 0.5m, LSZH, Violet

The Good Connections LW-U8005LC4 is a 0.5 m duplex uniboot OM4 multimode fibre optic patch cable (50/125 µm) with LC/UPC on one end and LC/UPC on the other, for short-reach multimode optics such as 1000BASE-SX or 10GBASE-SR SFP/SFP+ transceivers, multimode patch panels and server connections.

The violet 3.0 mm jacket is LSZH (low smoke, zero halogen), with a minimum bend radius of 7.5 mm. Every cable is tested and shipped with its own measurement report. OM4 is the higher-bandwidth 50/125 µm multimode grade (violet): it carries SR optics over longer distances than OM3 and mixes without problems with existing OM3 cabling.

• 1 × Good Connections OM4 duplex patch cable, LC/UPC to LC/UPC, 0.5 m
• Dust caps on the connectors
• Individual test / measurement report
• No couplers, adapters or transceivers are included

• Duplex = two fibres, one to transmit and one to receive. A standard SFP/SFP+ module uses both, so one duplex cable makes one link.
• Same connector on both ends: LC (small, latching) — fits SFP/SFP+ modules and high-density panels.
• Uniboot: both fibres run in one round cable with a single boot, which the manufacturer says saves up to 50% space versus a classic duplex cord — useful on crowded switch fronts.
• If the link shows no light, the duplex clip can be opened to swap polarity (A/B) — no re-termination needed.
• The pull tab lets you release the LC latch in tightly packed ports without a tool.
• Jacket colour follows the usual convention (yellow single-mode, aqua OM3, violet OM4, lime OM5), so the cable is easy to identify later in the rack.

• Single-mode (LX/LR/ER) transceivers or yellow OS2 cabling.
• Old 62.5/125 µm (OM1) cabling — the core size does not match 50/125 µm.
• APC (green) ports — many FTTH/GPON ONTs and fibre wall outlets use SC/APC.
• Ports other than LC (e.g. SC, ST, MPO/MTP) — use the matching cable or a suitable coupler.
• It is a passive cable: it does not turn an RJ45 copper port into fibre — that needs an SFP module or a media converter.