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What is the interface of the SX optical module

What is the interface of the SX optical module

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The SX optical module uses a Small Form-factor Pluggable (SFP) interface with a duplex LC connector for multimode fiber connections.

Detailed Explanation

The SX optical module, commonly referred to as a 1000BASE-SX SFP, is a hot-swappable, compact transceiver designed for Gigabit Ethernet over short distances using multimode fiber (MMF) . The "SX" designation indicates short-wavelength operation at 850nm, optimized for short-range links typically within a building or data center .

Interface and Connector

  • Form Factor: Small Form-factor Pluggable (SFP), which allows the module to plug directly into a compatible switch, router, or network interface card .
  • Connector Type: Duplex LC connector, which is the industry standard for modern 1G SFP modules. This connector supports two fibers—one for transmitting and one for receiving signals .
  • Fiber Compatibility: Works exclusively with multimode fiber (OM1, OM2, OM3, OM4, and OM5), and is not compatible with single-mode fiber .

Additional Technical Details

  • Laser Source: Uses a VCSEL (Vertical-Cavity Surface-Emitting Laser) at 850nm, providing reliable, low-power, and cost-effective optical transmission .
  • Data Rate: Supports 1 Gbps (Gigabit Ethernet) with 8B/10B encoding .
  • Distance: Maximum reach depends on fiber type—up to 550 meters on OM3/OM4 multimode fiber .
  • Hot-Swappable: Can be inserted or removed without powering down the network device, facilitating easy upgrades and maintenance . In summary, the SX optical module interface is standardized as an SFP form factor with a duplex LC connector, designed for short-range multimode fiber connections at 1 Gbps using an 850nm VCSEL laser. This ensures compatibility across compliant networking equipment and simplifies deployment in enterprise and data center environments .
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