LC Duplex Single-Mode Fiber Keystone Jack, White (KEYLCSM-WHI)

This is a duplex LC keystone jack for single-mode fiber, in white. It's a snap-in keystone insert with an LC duplex coupler in it: the LC connectors on the horizontal fiber plug into the back, the LC patch cord plugs into the front, and the plate, box, or panel looks like every other keystone outlet. It's specified for OS1 and OS2 9/125 µm single-mode, with 1.25 mm ceramic ferrule alignment and a typical insertion loss under 0.3 dB per fiber. The housing is UL 94 V-0 PBT with a stainless steel clip, rated for 500 matings and 10 kgf of pull. It fits standard keystone wall plates, surface-mount boxes, and blank keystone patch panels. It's sold individually. For the multimode version, the KEYLCMM-WHI; for the duplex LC single-mode cords that plug into it, the LCLCSM; for the plate, box, or panel, the WP2-series wall plates, the SMB006 keystone surface box, and the PPSTD blank keystone panel.

Features

• Duplex LC, single-mode. Transmit and receive in one keystone opening; OS1 and OS2 9/125 µm.
• Under 0.3 dB insertion loss. Typical, per fiber, with 1.25 mm ceramic ferrule alignment.
• 500 mating cycles minimum. 10 kgf tensile.
• Standard keystone snap-in. Tool-free; wall plates, surface-mount boxes, and blank keystone panels.
• UL 94 V-0 housing and insert. PBT housing, ABS insert, stainless steel clip, phosphor bronze sleeve.
• −20 to 70 °C operating. −40 to 80 °C storage.
• White.
• Sold individually.

Where It Fits

It suits a single-mode drop to a desk, a lab bench, or an equipment room where the pair lands at a wall plate beside the copper jacks and a duplex LC cord goes from the plate to the switch, the ONT, or the media converter. It suits a data center or a carrier room where a single-mode handoff has to come out at a keystone plate or a blank keystone panel rather than a fiber enclosure. Installers terminating long-reach single-mode at a keystone outlet use it, and so do IT staff adding one fiber port to a classroom, a camera position, or a remote building's wall box without a separate enclosure. A blank keystone patch panel in a small closet that mixes a few single-mode ports with the copper is a candidate. It goes with the single-mode bulk fiber, the LC connectors or pigtails for the horizontal side, and the duplex LC cords from the fiber collections, and with the WP2-series wall plates, the SMB006 keystone surface box, and the PPSTD blank keystone panel from the copper collection. For the single-mode cord, the LCLCSM. For a multimode plant, the KEYLCMM-WHI. For a blank keystone panel, the PPSTD.

Good to Know

Match the fiber on both sides: this is the single-mode jack, and for OM1, OM3, or OM4 the multimode KEYLCMM-WHI is the one to order. The page doesn't name a polish, and the connectors on single-mode keystone cords and pigtails are almost always UPC; if the plant is APC, with green connectors, check before you buy, since an APC ferrule in an adapter meant for UPC gives an air gap and a loss spike. The jack is a passive coupler, so it adds a mated pair to the link, roughly 0.3 dB per fiber, which the loss budget has to carry along with the connectors at the panel; on a long single-mode link that's usually small change, but it's worth noting on the as-built. The duplex insert keeps the A and B fibers side by side; check polarity when you plug in the back, since a crossed pair at the plate is the most common reason a fiber outlet that tests clean doesn't link. Clean and inspect both the cord's connectors and the connectors behind the plate before mating, and keep dust caps in the front of any jack without a cord in it; a 9 µm core is far less forgiving of a speck of dust than a multimode one. The fiber behind the plate needs room to bend: a standard single-gang box is shallow, so use a deep box or a surface-mount box and coil the slack in a loop no tighter than the fiber's bend radius before it enters the jack. The tensile rating is 10 kgf, which is more than enough for a patch cord but not for a cable hanging on the jack, so strain-relieve the horizontal fiber in the box. The jack is a standard keystone, so it snaps into standard keystone openings and not into a high-density panel such as the PPHD-24.

Specifications

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