SFP transceiver CBO SFP-1G-ZX-120KM-QL-BO 1.25 Gbps LC single‑mode 120 km

The CBO SFP-1G-ZX-120KM-QL-BO is an SFP optical transceiver module that supports a 1.25 Gbps data rate over single‑mode fiber with an LC connector and a nominal reach of 120 km. It is intended for long‑distance Ethernet and fiber‑optic links, providing uplink and WAN connectivity between switches, routers and transport equipment. The module features a hot‑pluggable small form factor for straightforward installation and replacement without powering down network devices.

Advantages

This SFP transceiver delivers stable 1.25 Gbps performance for long‑reach single‑mode links and uses an LC duplex interface for compatibility with common fiber patching systems. Its 120 km nominal reach enables long‑distance connections without the need for intermediate regeneration. The hot‑plug capability and compact SFP form factor simplify deployment and maintenance in dense rack environments. The design is suitable for fixed and transport network topologies where predictable optical performance and mechanical compatibility are required.

Suitable for

• Long‑distance Ethernet uplinks between data center switches and aggregation devices
• WAN links and metropolitan area network segments
• Fiber backbone connections between buildings or sites up to 120 km apart
• Upgrading existing equipment to single‑mode fiber without replacing chassis

Key specifications

• Data rate: 1.25 Gbps
• Fiber type: single‑mode (SMF)
• Connector: LC duplex
• Nominal link distance: up to 120 km
• Form factor: SFP (hot‑pluggable)
• Wavelength category: long‑reach (ZX class)

How to use

Insert the SFP transceiver into a compatible SFP port on the network device until it seats securely. Connect single‑mode fiber patch cords with LC connectors to the transceiver, ensuring correct transmit/receive orientation. Verify link status on the network equipment and configure interface settings (speed, duplex, and any required optical diagnostics) according to the device documentation. Replace or hot‑swap modules while observing electrostatic discharge precautions and manufacturer guidance.

Recommendations

Choose single‑mode fiber with appropriate attenuation characteristics and plan for end‑to‑end link loss to maintain sufficient optical power margin for 120 km operation. Use quality LC patch cords and clean connector endfaces before mating. Confirm compatibility with the host device and verify optical parameters after installation to ensure reliable long‑distance performance.