Fiber Optic SFP Transceiver CBO SFP-1G-LX-20KM — 1.25Gbps, single-mode, 20 km

CBO SFP-1G-LX-20KM is a fiber optic SFP transceiver module designed for 1.25 Gbps (1G) Ethernet links over single-mode fiber up to 20 km. The module uses a standard SFP form factor for hot-pluggable installation in switches, routers and media converters, enabling long-distance uplinks and backbone connections in telecom, data center and enterprise network environments. It supports 1G link speeds and is intended for single-mode fiber runs where extended reach and reliable optical performance are required.

Advantages

The transceiver provides a compact, hot-swappable solution for adding long-reach single-mode fiber connectivity without powering down equipment. Its SFP form factor ensures broad compatibility with SFP-capable network devices and allows flexible deployment in uplink and aggregation ports. Designed for stable 1.25 Gbps operation over distances up to 20 km, the module reduces the need for intermediate repeaters or additional active equipment on short metropolitan and campus links.

Suitable for

• Long-distance uplinks between switches and routers in enterprise networks
• Backbone and aggregation links in data centers and server rooms
• Telecom access and metro network segments requiring single-mode fiber
• Media converters and fiber extension installations

Key specifications

• Interface: SFP (hot-pluggable)
• Data rate: 1.25 Gbps (1G)
• Fiber type: Single-mode fiber (SMF)
• Maximum reach: Up to 20 km over single-mode fiber
• Wavelength: Typical long‑reach optical wavelength for LX modules
• Connector type: LC duplex
• Power consumption: Low-power SFP class device
• Operating environment: Designed for standard telecom and datacenter ambient conditions

How to use

Install the module into an empty SFP port on a compatible switch, router or media converter while the host device is powered on; the hot-pluggable design permits insertion and removal without system shutdown. Connect the LC duplex single-mode patch cable between transceivers at each end of the link, and verify optical link status via the host device management interface or LEDs. Configure port speed and duplex settings on the switch or router if required; most devices will detect 1G operation automatically. Ensure fiber polarity and connector cleanliness to maintain reliable signal transmission.

Recommendations

Use single-mode LC duplex fiber with appropriate attenuation margins for the intended link length and perform end-to-end optical power testing during installation. Keep connectors clean and use dust caps when ports are not in use. Confirm device compatibility with SFP modules in vendor documentation if strict vendor-lock guidance applies.