Extron 2LC OM4 MM P/40 (part number 26-671-40) — 40 meters of two-fiber OM4 multimode cable with LC ends and an OFNP plenum jacket. Extron lists the part number as retired.

At 40 meters the assembly is doing backbone duty. It spans multiple rooms, a long corridor, or a riser between adjacent floors, and it does so on a single continuous piece of glass with no intermediate connections to introduce loss or reflection. Even at this length the cable stays slim — 2.0 mm by 4.0 mm across the duplex body — so it competes for very little tray space against the copper it replaces.

Key Capabilities

• 40 m (131 ft) single continuous run with no intermediate splices.
• Laser-optimized OM4 glass, 2 fibers, 50/125 µm geometry.
• Under 1.2 dB per km attenuation at 1300 nm for the longer wavelength window.
• Under 3.0 dB per km at 850 nm for standard multimode transceivers.
• Duplex body only 2.0 mm x 4.0 mm — minimal tray and conduit fill.
• Retired Extron part number; sourcing depends on remaining inventory.

Where It Is Used

Forty-meter fiber assemblies tie Extron optical endpoints across building risers, arena concourses, multi-room medical suites and large corporate floors — distances where a factory-terminated cable removes the cost and schedule risk of on-site termination.

Specifications at a Glance

• Length: 40 m (131 ft)
• Optical: 50 µm (OM4) / 125 µm multimode, 2 fibers
• Connector type: LC with UPC polish
• Safety listing: ETL/c-ETL OFNP FT6, plenum rated
• Operating range: 0 to +70 °C

Also referenced as Extron 2LCOM4MMP40, 2LC-OM4-MM-P-40, part number 2667140.