SFP transceiver CBO SFP-1G-ZX-120KM-FR-BO 1.25 Gbit/s LC single-mode 120 km

CBO SFP-1G-ZX-120KM-FR-BO is a 1.25 Gbit/s SFP optical transceiver designed for single-mode fiber links up to 120 km. The module uses an LC duplex connector and operates in the ZX wavelength class to support long-reach transmission. It complies with standard SFP form-factor specifications and is intended for insertion into compatible SFP ports on switches, routers and media converters to establish reliable point-to-point fiber connections over extended distances.

Advantages

The transceiver provides a single-lane 1.25 Gbit/s interface optimized for long-distance single-mode networks, offering low power consumption and compact SFP form factor for flexible deployment. ZX-class optics deliver extended reach up to 120 km without the need for signal regeneration in many metro and access scenarios. The LC connector ensures compatibility with common single-mode patchcords, and the module follows standard SFP mechanical and electrical specifications for broad interoperability with networking equipment.

Suitable for

• Long-distance Ethernet links between data centers or POP sites
• Metro network segments and ring topologies
• ISP backbone interconnects and access aggregation
• Connections between distant switches, routers or media converters

Key specifications

• Nominal data rate: 1.25 Gbit/s (SFP optical interface)
• Fiber type: single-mode
• Maximum reach: up to 120 km over suitable single-mode fiber
• Connector type: LC duplex
• Optical class: ZX wavelength class for long-reach transmission
• Form factor: SFP (small form-factor pluggable)
• Typical power consumption: low (compatible with standard SFP power budgets)

How to use

Install the transceiver into a compatible SFP slot on network equipment while the host port is powered down or following the vendor’s hot-plug guidelines. Connect an LC duplex single-mode patchcord between the transceiver and the remote transceiver, observing correct transmit/receive orientation. Configure the host port to the required speed and duplex settings if manual configuration is needed; most devices will negotiate the 1.25 Gbit/s link automatically. Verify the link status and monitor optical parameters from the host device to confirm proper operation and adequate signal margin for the intended fiber span.

Recommendations

Use certified single-mode fiber with appropriate attenuation characteristics for long-reach links and ensure proper cleaning of LC connectors before mating. Check vendor compatibility lists for known interoperable devices and monitor optical power and BER where available. For spans approaching the maximum reach, consider measured fiber attenuation, splices and connector losses when planning the link.