For short-distance, high-speed connections within data centers, use multimode fiber patch cords such as OM3 or OM4 with LC or MPO connectors, depending on your network density and transceiver type.

Fiber Type Selection

Multimode fiber patch cords are designed for short to medium distances, typically within a data center or campus network. Common multimode types include:

• OM1 (62.5/125 µm, orange jacket): Legacy systems, suitable for 1G networks up to 275 meters.
• OM2 (50/125 µm, orange jacket): Supports 1G–10G networks up to 550 meters.
• OM3 (50/125 µm, aqua jacket): Optimized for 10G–40G Ethernet, distances up to 300 meters.
• OM4 (50/125 µm, aqua jacket): Enhanced version of OM3, supports 10G–100G Ethernet, distances up to 400 meters.
• OM5 (50/125 µm, lime green or violet jacket): Wideband multimode fiber for short-wave division multiplexing (SWDM), ideal for high-density, high-speed applications .

Connector Types

Connector choice depends on port density, transceiver compatibility, and network layout:

• LC (duplex): Small form factor, high-density, widely used in modern data centers. Ideal for server-to-switch or patch panel connections.
• SC (simplex/duplex): Larger, push-pull connector, mostly legacy systems.
• MPO/MTP: Multi-fiber connectors (8, 12, 24, 32 fibers) for parallel optics, used in 40G, 100G, and 400G networks. Suitable for leaf-spine interconnects or high-density racks .

Jacket and Environmental Considerations

• PVC: Standard indoor use, not suitable for air ducts.
• Plenum (OFNP): Fire-resistant, safe for air ducts.
• Riser (OFNR): For vertical shafts between floors.
• LSZH (Low Smoke Zero Halogen): Emits minimal smoke and toxic gas, required in high-safety areas or European data centers .

Application Guidelines

• Short intra-rack connections: LC duplex OM3/OM4 multimode patch cords.
• Inter-rack or high-density connections: MPO/MTP multimode patch cords for parallel optics.
• Legacy systems: OM1 or OM2 with SC connectors.
• High-speed AI or 400G clusters: Consider OM4/OM5 with MPO or next-gen MDC/CS connectors .

Key Tips

• Do not mix single-mode and multimode fibers, as this causes signal loss.
• Verify connector compatibility with transceivers and patch panels.
• Keep patch cords clean and avoid excessive bending to maintain performance.
• Label cords for easier troubleshooting and network management . By matching the fiber type, connector, and jacket to your network's distance, speed, and environmental requirements, you can ensure reliable, high-performance multimode fiber connections.