Panduit FHS9N-24-10P HD Flex™ 24-Fiber OS2 LC Splice Cassette

The Panduit FHS9N-24-10P is a pre-loaded 24-fiber OS2 single-mode splice cassette engineered for high-density datacenter, campus backbone, and enterprise fiber termination points. Part of Panduit's HD Flex™ product line, this cassette ships with LC duplex connectors on the front panel and discrete unterminated pigtails on the rear, enabling field technicians to splice incoming trunk cables in a controlled enclosure environment while maintaining factory-terminated LC connectivity on the active equipment side. Black polycarbonate construction delivers mechanical durability and professional aesthetics in rack-mounted fiber management systems.

Key Features

• 24-fiber OS2 single-mode capacity in compact cassette form factor for maximum rack density
• 12 LC duplex ports on front panel, factory-terminated with standard insertion loss performance
• Pre-loaded discrete pigtails on rear, unterminated for field splicing to incoming trunk cables
• HD Flex™ high-density design integrates seamlessly with Panduit fiber enclosures and cable managers
• Black polycarbonate construction resists impact and environmental stress
• 9 μm fiber diameter OS2 specification supports 10G, 40G, 100G, and future data rates
• Discrete pigtail architecture allows individual fiber routing and selective splice point access
• Standard insertion loss specification ensures predictable link budget performance
• Field-installable in Panduit enclosures without specialized tooling
• Meets TIA-568 and ISO/IEC standards for OS2 single-mode fiber termination

OS2 single-mode fiber is the backbone standard for datacenter interconnects, campus fiber runs, and metro-area links where distance and bandwidth demand exceed multimode capabilities. The FHS9N-24-10P cassette uses 9/125 μm (core/cladding diameter) OS2 fiber, which supports transmission distances up to 10 km at 10 Gbps and significantly farther at lower data rates or with higher-grade optics. This specification makes the cassette suitable for main distribution area (MDA) to horizontal distribution area (HDA) connections in large buildings, inter-building campus links, and datacenter spine-to-leaf topologies where future migration to 100G or 400G optics is anticipated. The LC duplex connector format is the dominant choice in enterprise and datacenter environments due to its small footprint—each duplex port occupies roughly half the panel space of SC duplex, enabling 12 duplex ports (24 fibers) in the same cassette footprint that older designs might allocate to 6 SC ports. Standard insertion loss performance means each factory-terminated LC connector meets industry thresholds (typically ≤0.5 dB for single-mode LC), preserving your link budget for the fiber span itself rather than consuming margin in the termination hardware. Discrete pigtail construction—where each of the 24 fibers terminates individually rather than as a 24-fiber ribbon—gives installation crews flexibility to route fibers within the enclosure, manage bend radius individually, and access specific splice points without disturbing adjacent fibers. This is particularly valuable in retrofit scenarios or when splice trays must accommodate multiple cable entry points with different routing paths.

Field deployment of the FHS9N-24-10P follows a structured workflow that separates factory-controlled termination from field splicing, reducing the risk of connector end-face contamination and assembly errors on the active equipment side. The cassette mounts in a Panduit HD Flex enclosure (such as the FHD series) via a snap-in or slide-in rail system, positioning the front LC duplex panel flush with the enclosure door for patch cord access. Incoming trunk cables—typically 12-fiber or 24-fiber loose-tube or tight-buffered cables from building risers, inter-building conduit, or datacenter hot aisles—enter the rear of the enclosure and route into splice trays integrated within the cassette or adjacent to it. Technicians strip the trunk cable jacket, separate the buffer tubes or tight-buffered fibers, clean and cleave each fiber, then fusion-splice it to the corresponding unterminated pigtail extending from the cassette rear. Once splices are complete and secured in the tray, slack is dressed and the enclosure door closes, protecting the splice points from dust, vibration, and accidental contact. Front-side patch cords—standard LC duplex jumpers—connect the cassette ports to SFP+, QSFP28, or QSFP-DD transceiver modules in switches, routers, or storage arrays. This architecture confines all field splicing to a controlled, protected environment while presenting clean, factory-grade LC interfaces to the active equipment. In a typical datacenter row deployment, a single 4U enclosure populated with multiple FHS9N-24-10P cassettes can terminate 288 fibers (12 cassettes × 24 fibers), consolidating what would otherwise require dozens of wall-mount panels or multiple larger cabinets. The HD Flex sub-brand designation indicates Panduit's focus on space efficiency—rack units are expensive in colocation facilities and enterprise datacenters, so maximizing fiber count per RU directly reduces infrastructure cost and improves airflow management by keeping cable pathways compact.

The FHS9N-24-10P addresses a specific deployment challenge in modern fiber infrastructure: balancing the need for field-installable splice points with the reliability and speed of factory-terminated connectors. Pre-terminated trunk assemblies (where both ends ship with connectors already installed) eliminate field splicing but require precise length planning and can complicate moves, adds, and changes when cable routes shift. Field termination of LC connectors is possible with epoxy-polish or mechanical splice kits, but the process is time-consuming, requires trained technicians, and introduces variability in insertion loss and return loss performance. The cassette approach splits the difference—factory-terminated LC connectors on the customer-facing side deliver consistent optical performance and fast deployment, while unterminated pigtails on the splice side preserve the flexibility to accommodate any trunk cable length, routing change, or enclosure relocation. Compliance with TIA-568.3-D and ISO/IEC 11801 for OS2 fiber ensures the cassette meets industry insertion loss, return loss, and mechanical durability thresholds, critical for installations subject to building code inspections, carrier service-level agreements, or enterprise IT standards audits. Polycarbonate material selection provides impact resistance superior to ABS or other thermoplastics, important in environments where rack access is frequent and the risk of dropped tools or equipment contact is high. The black color coding aligns with single-mode fiber convention, helping technicians visually distinguish single-mode cassettes from multimode (typically beige or aqua) in mixed-fiber deployments where both types coexist in the same enclosure.