SFP Transceiver Cisco MGBSX1 — Gigabit Ethernet 1000BASE-SX, 850 nm, up to 550 m

The Cisco MGBSX1 SFP transceiver (1000BASE-SX mini-GBIC) is a hot-pluggable module that adds fiber connectivity to compatible Cisco switches and network devices. Designed for Gigabit Ethernet links over multimode fiber, the module supports short-range optical connections and integrates with Cisco 100, 200, 300 and 500 Series switches. Physical dimensions are compact and the unit follows the SFP form factor for easy installation and replacement.

Advantages

The MGBSX1 provides a standardized SFP interface for quick installation and hot-swap replacement, supporting reliable Gigabit Ethernet links over multimode fiber at an 850 nm wavelength. It enables fiber connectivity for supported Cisco switch series without replacing the entire device, and its compact mini-GBIC form factor simplifies port upgrades. The transceiver supports optical distances commonly used in campus and building backbones.

Suitable for

• Short-range Gigabit Ethernet links over multimode fiber (1000BASE-SX)
• Adding fiber ports to Cisco 100, 200, 300 and 500 Series switches
• Campus, office floor or building backbone connections up to ~550 m

Key specifications

• Standard: 1000BASE-SX (Gigabit Ethernet)
• Form factor: SFP / mini-GBIC
• Wavelength: 850 nm
• Maximum transfer distance: up to 550 m (multimode fiber)
• Compatibility: Cisco 100/200/300/500 Series switches
• Manufacturer part number (MPN): MGBSX1
• EAN: 0745883558766
• Country of origin: China

How to use

Power down is not required for many Cisco platforms that support hot-pluggable SFPs; insert the MGBSX1 into an available SFP slot until it seats fully. Configure the switch port as needed (speed/duplex or trunk/access settings) via the device CLI or GUI. Use appropriate multimode fiber (MMF) patch cords and verify transceiver and fiber type compatibility. Monitor link status and adjust switch configuration if necessary.

Usage recommendations

Use multimode fiber compliant with 1000BASE-SX standards and keep patch cord lengths within the supported range (up to ~550 m depending on fiber grade). Handle the SFP by the housing, avoid touching optical interfaces, and store unused transceivers with dust caps to protect the fiber connector.