SFP module CBO SFP-1G-ZX-120KM-DE-BO 1.25 Gbit/s single-mode LC, 120 km

CBO SFP-1G-ZX-120KM-DE-BO is a small form-factor pluggable (SFP) transceiver module engineered for long‑reach single‑mode fiber connections. The module delivers a 1.25 Gbit/s optical interface with ZX-class optics over single‑mode fiber and uses an LC duplex connector. It is intended for applications that require extended distance links up to 120 km and supports a 1250 Mbit/s line rate for Gigabit Ethernet and similar protocols.

Advantages

This SFP module provides long-distance single‑mode transmission with a compact SFP form factor compatible with a wide range of switches and routers that accept standard SFP optics. The LC connector ensures reliable duplex fiber connections while the ZX wavelength class enables extended reach up to 120 km without inline amplification in typical conditions. The module supports a 1.25 Gbit/s data rate, making it suitable for Gigabit links and uplink ports.

Suitable for

• Long‑reach fiber uplinks between sites or buildings
• Metro and access network links requiring extended distance
• Fiber backbone extensions and aggregation ports
• Carrier and service provider optical segments

Key specifications

• Form factor: SFP (small form-factor pluggable)
• Data rate: 1.25 Gbit/s (supports 1250 Mbit/s line rate)
• Fiber type: single‑mode (SMF)
• Wavelength class: ZX (long‑reach optics)
• Connector type: LC duplex
• Nominal reach: up to 120 km over single‑mode fiber
• Application layer: suitable for Gigabit Ethernet and similar serial optical links

How to use

Install the module into an SFP port on a compatible switch, router or optical device while the host device is powered on or off depending on the vendor's guidance. Connect LC duplex single‑mode fiber patch cords ensuring correct transmit/receive alignment. Verify that the host device recognizes the transceiver and configure the interface for the required speed and duplex settings if necessary. Monitor link status indicators and diagnostic information provided by the network device to confirm stable operation.

Recommendations

For reliable operation, use low‑loss single‑mode fiber and quality LC connectors, keep connector endfaces clean, and ensure link budget and optical power margins are sufficient for the 120 km reach. Confirm compatibility with the host equipment's supported optical modules and firmware. If distances approach the module's nominal limit, validate the link with optical power measurements before deployment.