Indoor OM4 fiber optic cable is a high-bandwidth, laser-optimized 50µm multimode fiber designed for indoor network installations, supporting 10G, 40G, and 100G Ethernet over extended distances.

Overview

OM4 is a multimode fiber (MMF) with a 50-micron core diameter, optimized for laser-based transmission, providing an effective modal bandwidth (EMB) of 4700 MHz·km for 10 Gb/s applications and supporting higher-speed 40 Gb/s and 100 Gb/s links over longer distances than OM3 fiber . It was standardized by TIA/EIA in 2009 under the TIA-492AAAD specification . OM4 is widely used in enterprise LANs, data centers, and intra-building backbones where high-speed, high-bandwidth connectivity is required .

Indoor Cable Characteristics

Indoor OM4 cables are designed for safe and reliable use within buildings. Key features include:

• Plenum-rated jackets for installation in air-handling spaces, meeting NFPA low-smoke requirements .
• Tight-buffered 900µm fibers for easy termination and handling.
• Aramid yarn strength members for mechanical protection during installation.
• Durable outer jackets to withstand multi-floor deployments and intra-building backbones . These cables are suitable for headend terminations, fiber rack systems, and multi-floor deployments, providing flexibility for selective fiber use on each floor .

Performance and Applications

OM4 fiber extends the reach of multimode networks compared to OM3:

• 10 Gb/s Ethernet: up to 550 meters
• 40 Gb/s Ethernet: up to 150 meters
• 100 Gb/s Ethernet: up to 100 meters This extended reach allows many installations to avoid the higher cost of singlemode fiber (OS2) while still supporting next-generation high-speed applications . Indoor OM4 cables are ideal for intra-building backbones, data center interconnects, and enterprise LANs where high bandwidth and low latency are critical .

Summary

Indoor OM4 fiber optic cable is a high-performance, multimode solution for indoor network infrastructure, offering laser-optimized bandwidth, plenum-rated safety, and extended reach for 10G–100G Ethernet applications. It is a cost-effective choice for modern enterprise and data center networks, providing flexibility and reliability for multi-floor and high-density deployments .