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

The CBO SFP-1G-ZX-120KM is an SFP optical transceiver module designed to deliver 1.25 Gbps Ethernet connectivity over single-mode fiber for distances up to 120 km. Engineered for long-distance links between switches, routers and media converters, this small-form pluggable module supports hot-plug installation and interoperates with standard SFP ports to enable straightforward deployment in campus backhaul, metro Ethernet and remote site links. The transceiver is intended for single-mode fiber environments where stable, long-reach optical performance is required.

Advantages

The module provides a stable 1.25 Gbps line rate suitable for Gigabit Ethernet applications and is optimized for long-range single-mode fiber transmission up to 120 km. Its SFP form factor supports hot-swappable insertion and removal without powering down network equipment, simplifying maintenance and upgrades. The design emphasizes interoperability with standard SFP ports and common network devices, enabling flexible integration into existing fiber infrastructures.

Suitable for

• Long-distance fiber links between network switches and routers
• Campus backbone and inter-building connections
• Metro Ethernet aggregation and transport
• Connecting remote sites, data centers or POP locations
• Integration with media converters and optical equipment for extended reach

Key specifications

• Interface: SFP (Small Form-factor Pluggable)
• Data rate: 1.25 Gbps (suitable for Gigabit Ethernet)
• Optical mode: single-mode fiber
• Maximum reach: up to 120 km over single-mode fiber
• Wavelength: typical long-range (ZX) optical wavelength for extended reach
• Connector type: LC duplex (standard for SFP single-mode transceivers)

How to use

Insert the transceiver into an available SFP port on a compatible switch, router or media converter while the device is powered on; the hot-pluggable design allows installation without shutting down the host. Connect the single-mode fiber patch cable with LC duplex connectors to the transceiver ports, ensuring correct transmit/receive alignment. Verify link status on the host device and monitor optical signal indicators where available. For best performance, confirm that the fiber span, patch cables and any intermediate connectors are certified for single-mode operation and meet the distance requirements.

Recommendations

Use the transceiver in environments with proper fiber attenuation budget planning for 120 km links. Keep dust caps on the optical ports when not connected, and handle fibers and connectors with care to avoid contamination. Verify compatibility with the target device and update device firmware or configuration if link negotiation issues occur.