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What is the difference between 100G SR10 and SR4?
Knowledge Base + 2024.01.09

The terms "100G SR10" and "100G SR4" refer to different optical transceiver modules used in 100 Gigabit Ethernet (100GbE) networking. These modules are designed for specific types of optical fiber and have different configurations. Here are the key differences between 100G SR10 and 100G SR4:

  1. Number of Lanes:

    • 100G SR10: The "10" in SR10 indicates that it uses 10 parallel lanes for data transmission. This type of module is typically used with ribbon multimode fiber (MPO/MTP) and is designed for short-range connections.

    • 100G SR4: The "4" in SR4 indicates that it uses 4 parallel lanes for data transmission. SR4 modules are designed for short-range connections and commonly use standard multimode fiber with a duplex LC connector.

  2. Connector Type:

    • 100G SR10: SR10 modules typically use MPO/MTP connectors, which are multi-fiber connectors designed to accommodate the 10 parallel fibers used in SR10 configurations.

    • 100G SR4: SR4 modules typically use duplex LC connectors. Each of the four parallel lanes is transmitted over a separate fiber within the duplex cable.

  3. Fiber Type:

    • 100G SR10: SR10 modules are designed for ribbon multimode fiber, which contains multiple fibers within a single cable.

    • 100G SR4: SR4 modules use standard multimode fiber with a core size of 50 microns and are compatible with OM3 or OM4 grades of multimode fiber.

  4. Distance Reach:

    • 100G SR10: SR10 modules are suitable for short-range connections, typically within the data center. The exact reach can depend on factors like the quality of the fiber and the specific implementation.

    • 100G SR4: SR4 modules are also designed for short-range connections, with a typical reach of up to 100 meters over OM3 multimode fiber and up to 150 meters over OM4 multimode fiber.

  5. Deployment and Use:

    • 100G SR10: SR10 modules are less common than SR4 modules and are typically used in specific environments where the ribbon multimode fiber is preferred or required.

    • 100G SR4: SR4 modules are widely used for short-range connections in data center environments.

When selecting between 100G SR10 and 100G SR4, it's important to consider factors such as the type of fiber infrastructure in place, the connector type used, and the specific requirements of the networking environment. Always refer to the product specifications and compatibility guidelines provided by the transceiver and networking equipment manufacturers for accurate information.