SFP module CBO SFP-1G-ZX-120KM-NK-BO 1.25 Gbit/s LC ZX singlemode 120 km

CBO SFP-1G-ZX-120KM-NK-BO is a single‑mode SFP optical transceiver designed for 1.25 Gbit/s Ethernet and fiber channel links. The module uses an LC connector and ZX wavelength class to support long‑distance optical transmission over single‑mode fiber up to 120 km. It is hot‑pluggable for easy replacement and installation in switches, routers and media converters that accept standard SFP form‑factor modules and ZX optical interfaces.

Advantages

The module provides reliable long‑reach connectivity with a ZX class transmitter optimized for extended single‑mode fiber runs. Its compact SFP form factor enables flexible deployment in device uplinks and line cards without occupying large slots. Hot‑pluggable operation reduces maintenance time and the need to power down equipment during upgrades. Designed for compatibility with standard 1.25 Gbit/s interfaces, the transceiver supports stable optical links for metropolitan, inter‑city and long‑haul applications.

Suitable for

• Long‑distance fiber uplinks between central offices or data centers
• Metropolitan area network (MAN) backbone links
• Optical connections in campus and carrier networks requiring 120 km reach
• Replacement or upgrade of 1.25 Gbit/s SFP ports to extend link distance

Key specifications

• Data rate: 1.25 Gbit/s
• Fiber type: single‑mode fiber (SMF)
• Connector type: LC duplex
• Optical class: ZX (long‑reach wavelength)
• Maximum link distance: up to 120 km on single‑mode fiber
• Form factor: SFP (small form‑factor pluggable)
• Interface: optical duplex transmit/receive

How to use

Insert the SFP module into an empty SFP slot of a compatible switch, router or media converter until it clicks into place. Connect LC duplex single‑mode patch cables to the module’s ports observing correct transmit/receive orientation. Verify link activity in the host device and adjust optical power margin or dispersion compensation if required for long spans. For removal, release the module latch and pull straight out while the host device is powered according to the equipment manual.

Recommendations

Use high‑quality single‑mode fiber and LC connectors, keep connectors clean and inspect endfaces before mating. Ensure fiber path loss and splice/connector budgets are within the module’s reach for 120 km links and use inline amplifiers or dispersion management only when necessary. Confirm compatibility with the host equipment’s SFP vendor and ZX wavelength support to prevent link negotiation issues.