SFP fiber optic transceiver CBO SFP-1G-ZX-120KM 1.25Gbps 120 km single-mode

CBO SFP-1G-ZX-120KM is a single-mode SFP fiber optic transceiver that supports a 1.25 Gbps data rate and a maximum link reach of up to 120 km. Designed for long-reach Ethernet and telecom connections, the module fits standard SFP ports and provides a compact, hot-pluggable solution for optical uplinks between switches, routers and media converters. The transceiver uses single-mode fiber optics for point-to-point links where extended distance and stable signal integrity are required.

Advantages

The transceiver offers long-distance transmission up to 120 km in a small form factor compatible with standard SFP interfaces. It supports a 1.25 Gbps data rate suitable for Gigabit Ethernet and many telecom applications, and it is hot-pluggable to allow installation or replacement without powering down equipment. The single-mode design reduces signal loss over long spans and is suitable for metropolitan and inter-site connectivity. Its compact metal housing provides mechanical protection and aids heat dispersion during continuous operation.

Suitable for

• Long-distance Gigabit Ethernet links between network switches and routers
• Fiber uplinks for telecom and metropolitan area networks
• Connecting media converters to extend Ethernet over single-mode fiber
• Inter-site connectivity for campus, data center or branch office links

Key specifications

• Form factor: SFP (small form-factor pluggable)
• Data rate: 1.25 Gbps
• Fiber type: single-mode
• Maximum link distance: up to 120 km (typical single-mode performance)
• Wavelength: long wavelength (compatible with single-mode long-reach optics)
• Connector type: LC duplex
• Operating temperature: commercial range suitable for typical indoor network equipment

How to use

Insert the SFP transceiver into a compatible SFP slot on a switch, router or media converter until it seats and the latch engages. Connect single-mode fiber cables with LC duplex connectors to the module’s ports, ensuring proper transmit-to-receive alignment between endpoints. Verify link status through the host device LEDs or management interface and configure the corresponding port for 1.25 Gbps operation if required. For safe handling, avoid touching the optical interfaces and replace protective dust caps when ports are unused.

Recommendations

Use single-mode fiber with appropriate attenuation and dispersion budgeting for long spans; ensure fiber connectors are clean and tested before installation. Match optical wavelength and power specifications on both ends of the link and verify compatibility with the host equipment’s SFP port. For critical links, perform end-to-end testing and monitor signal quality through network management tools.