Hubbell DFPCFCFCS1SM Plenum Duplex FC-FC Singlemode OS2 Fiber Patch Cord, 1 Meter

Overview

The Hubbell DFPCFCFCS1SM is a 1-meter, duplex, FC-to-FC singlemode OS2 fiber patch cord with a plenum-rated jacket — built for structured cabling runs inside air-handling spaces where fire code compliance is not optional. If you're patching between FC-port transceivers or fiber distribution panels in a ceiling plenum or raised-floor environment, this cord checks the three non-negotiable boxes: the right connector on both ends, the right fiber type, and a jacket that won't generate toxic smoke in a fire. For broader options across fiber types and lengths, browse the full fiber optic cable and assemblies category.

Key Features

• FC-to-FC Duplex Connectors: FC (Ferrule Connector) terminations on both ends — the threaded, screw-lock interface used in high-vibration environments and legacy telecom/datacom equipment where push-pull connectors can loosen. Duplex means both TX and RX fibers ship together in one cord, simplifying patch panel to transceiver runs and eliminating mismatched pairs.
• OS2 Singlemode Fiber: OS2 is the current ITU-T G.652.D standard for tight-buffered singlemode glass — 9/125µm geometry, optimized for low water-peak performance at both 1310nm and 1550nm wavelengths. For backbone and inter-equipment links where you need low insertion loss over extended distances, OS2 is the correct fiber class; multimode OM3/OM4 is not a substitute here. Pair this cord with compatible singlemode SFP transceivers on both ends.
• Plenum-Rated Jacket (CMP): The plenum rating (CMP) means the jacket compound meets NFPA 262 and UL 910 burn and smoke-density requirements for installation in air-handling plenums without conduit. In practice: you can run this cord above drop ceilings and under raised floors in commercial buildings where code prohibits riser or LSZH-only jackets. Using a non-plenum cord in a plenum space is a code violation and a liability; this cord removes that risk.
• 1-Meter Length: At 1 meter, this cord is sized for in-rack or patch-panel-to-switch connections — equipment bay to bay, transceiver to panel port, or shelf-to-shelf within the same rack enclosure. It's tight enough to keep cable management clean without excess slack pooling in the rear of the rack. For longer horizontal or inter-rack runs, consider a longer variant from the fiber patch cord lineup.
• Hubbell Commercial-Grade Construction: Hubbell's structured cabling line targets commercial and enterprise installation standards. For a broader look at the Hubbell cabling catalog, including patch panels, connectors, and faceplates, the brand page covers the full portfolio.

Integration & Compatibility

The DFPCFCFCS1SM works with any equipment that presents an FC fiber port — including older telecom switching equipment, certain optical test instruments, and fiber distribution frames that standardized on FC before LC became the dominant enterprise connector. Verify that both endpoints use FC UPC (ultra-physical contact) or FC APC (angled physical contact) ferrules; UPC and APC are not interchangeable — an APC-to-UPC mating will cause elevated return loss and degrade link performance. This cord's OS2 designation confirms singlemode-only use; installing it in a system expecting multimode fiber will result in no signal transfer. For planning your full fiber backbone, the structured cabling planning guide covers fiber selection, distance budgets, and connector compatibility in detail. If your installation also requires fiber patch panels, those are available as a complementary category.

Frequently Asked Questions

Q: Is the DFPCFCFCS1SM rated for installation in plenum air-handling spaces?

A: Yes. The DFPCFCFCS1SM carries a plenum (CMP) jacket rating, meeting the smoke and flame requirements for installation in air-handling ceiling and floor plenum spaces without conduit, per NFPA 262 / UL 910 standards.

Q: Can I use the DFPCFCFCS1SM with multimode fiber equipment?

A: No. OS2 is a singlemode fiber standard (9/125µm). Connecting it to multimode transceivers or patch panels will result in incompatible geometry and no usable signal. Confirm your endpoints require singlemode OS2 before ordering.

Q: Will FC APC and FC UPC connectors mate with each other on this cord?

A: FC UPC and FC APC ferrules are physically compatible (same thread pattern) but should not be mated — the 8° angle on an APC ferrule creates a gap when paired with a flat UPC end, increasing return loss significantly. Match ferrule polish types on both ends of the link.

Q: Is 1 meter long enough for inter-rack connections?

A: At 1 meter, the DFPCFCFCS1SM is best suited for within-rack or same-bay connections — patch panel to switch, transceiver to distribution frame in the same enclosure. For inter-rack runs or cross-room links, a longer cord from the same family is the correct choice.

Q: What wavelengths does OS2 singlemode fiber support?

A: OS2 (ITU-T G.652.D) is optimized for operation at both 1310nm and 1550nm wavelengths, with low water-peak attenuation across the full spectrum. This makes it compatible with the broad range of singlemode SFP, SFP+, and DWDM transceivers used in enterprise and carrier networks.

Ted Perry

The DFPCFCFCS1SM comes up regularly in legacy telecom closet refreshes and in any project where the existing fiber distribution frame was built around FC ports before LC became the dominant enterprise standard. The plenum jacket is the detail that matters most here — if you're running this cord above a drop ceiling in a commercial building, that CMP rating is what keeps the installation code-compliant and the building inspector satisfied.

Technical Highlights:

• Plenum CMP Jacket: Meets NFPA 262 / UL 910 for air-plenum installation without conduit — eliminates the conduit cost and labor that a riser-rated cord would require in the same space.
• OS2 Singlemode Glass: 9/125µm geometry supports both 1310nm and 1550nm operation, meaning this cord stays compatible as you upgrade transceivers from standard SFP to SFP+ or DWDM modules — the fiber doesn't become the limiting factor.
• FC Duplex Termination: The threaded FC interface locks under vibration where LC or SC snap-fit connectors can back out — relevant in equipment rooms with HVAC vibration or near-floor condenser units.

Deployment Considerations:

• Verify ferrule polish type (UPC vs APC) on both endpoints before ordering. FC connectors are mechanically intermateable but optically mismatched across polish types — this is the most common field error with FC cords and it will degrade return loss on the link.
• At 1 meter, this cord is dimensioned for within-rack use. If the patch panel and the active equipment are in separate racks — even adjacent ones — measure the actual run before assuming 1 meter is sufficient; a cord under tension at the connector puts stress on the ferrule seat.

The DFPCFCFCS1SM is the right specification for telecom equipment room renovations where the fiber distribution frame is FC-based, the ceiling space is a return-air plenum, and the link budget requires singlemode OS2 glass — a scenario common in healthcare, financial, and municipal facilities upgrading legacy optical infrastructure.