Extron 2LC OM4 MM P/20 (part number 26-671-20) — a 20 meter LC-to-LC duplex assembly on laser-optimized OM4 glass, jacketed for plenum use. Extron has retired this part number.

Twenty meters typically means the fiber is leaving the room. Runs of this length go from an AV rack to a projector position at the back of a hall, from a floor closet to a nearby classroom, or between two racks separated by a corridor. Multimode OM4 is comfortable at this distance with margin to spare, and because the fiber is bend-insensitive the installer can route it through tight ceiling turns without accumulating measurable loss.

Key Capabilities

• 20 m (65.6 ft) of ready-terminated duplex OM4 fiber.
• Bend-insensitive glass tolerates a 0.3 in (7.5 mm) radius once installed.
• Attenuation under 3.0 dB per km at 850 nm; under 1.2 dB per km at 1300 nm.
• Aramid yarn reinforcement supports pulls through conduit and tray.
• ETL/c-ETL OFNP FT6 plenum jacket for concealed above-ceiling paths.
• Listed by Extron as a retired part number.

Where It Is Used

Twenty-meter Extron fiber links serve room-to-closet and rack-to-projector paths in auditoriums, teaching hospitals, corporate training floors and municipal council chambers, where copper would already be marginal but a full building-backbone pull is unnecessary.

Specifications at a Glance

• Length: 20 m (65.6 ft)
• Fiber: 2 strands, glass, 50/125 µm OM4
• Insertion loss: below 0.5 dB per 300 m at 850 or 1300 nm
• Assembly cross-section: 2.0 mm x 4.0 mm
• Warranty: Limited Lifetime Performance

Also referenced as Extron 2LCOM4MMP20, 2LC-OM4-MM-P-20, part number 2667120.