EFB-Elektronik LC-LC Duplex Fiber Optic Patch Cable, OM3 Multimode 50/125, 2m, LSZH 2.0mm, Aqua

The EFB-Elektronik O0312.2 is a 2 m duplex LC-to-LC OM3 multimode (50/125 µm) fibre patch cable with a 2.0 mm LSZH jacket in aqua, for connecting SR/SX multimode optics in switches, routers, media converters and patch panels.

Duplex means two fibres in one cord: one transmits and one receives, which is what almost every SFP module and media converter expects. The LSZH (Low Smoke Zero Halogen) jacket gives off little smoke and no halogen gases in a fire, which is why it is the usual choice for offices, server rooms and shared spaces.

• 1 × duplex fibre patch cable LC-LC, 2 m
• 2 × duplex clips
• 1 × individual measurement report
• 1 × information sheet
• Resealable EFB poly bag

• Multimode 50/125 fibre is for short-reach optics at 850 nm: SFP and SFP+ modules marked SR or SX. Per IEEE 802.3, 10GBASE-SR reaches up to 300 m on OM3 and 400 m on OM4; 1000BASE-SX reaches 550 m on 50/125 fibre.
• OM3 and OM4 use the same 50/125 core and the same optics, so this cord can be mixed into an existing OM3 or OM4 link; the link simply performs to the lower grade.
• LC: the small-form-factor connector used by SFP, SFP+, SFP28 and QSFP transceivers and most modern patch panels
• Colour code: aqua is the usual jacket colour for OM3 fibre, so the run is easy to tell apart in a shared rack.
• Handling: keep the dust caps on until you plug in, clean the end faces before mating, and route the cable without sharp bends or tight ties — most "dead" fibre links are a dirty connector or a kinked cord, not a faulty cable.

• Single-mode LX/LR transceivers (1310/1550 nm) — they need OS2 single-mode cable.
• 62.5/125 (OM1) cable, couplers or older equipment ports — the core sizes differ and the mismatch causes heavy loss in one direction.
• Copper RJ45 ports — fibre needs an optical transceiver or a media converter at each end.