SFP fiber transceiver CBO for Allied Telesis SFP-1G-LX-20KM, 1 Gbps, single-mode, 20 km

CBO SFP fiber transceiver compatible with Allied Telesis SFP-1G-LX-20KM provides 1 Gbps optical connectivity over single-mode fiber for distances up to 20 km. The module uses the SFP pluggable form factor for straightforward insertion into compatible switches, routers and media converters. It is intended for use in point-to-point links, campus backbones and metro segments where a single-mode gigabit uplink or aggregation port is required.

Advantages

The transceiver supports a full 1 Gbps data rate on single-mode fiber and conforms to standard SFP dimensions for broad compatibility with equipment that accepts 1G SFP modules. Its single-mode reach of up to 20 km makes it suitable for medium-distance optical links without the need for additional active equipment. The hot-pluggable design enables replacement or addition of ports without powering down network devices, while compact SFP sizing conserves port space in high-density chassis.

Suitable for

• Long-distance uplinks between buildings or sites up to 20 km
• Campus backbone and inter-building fiber links
• Metro and access provider point-to-point connections
• Upgrading copper uplinks to gigabit optical links

Key specifications

• Data rate: 1 Gbps
• Fiber type: single-mode
• Maximum link distance: up to 20 km
• Connector type: LC duplex
• Form factor: SFP (hot-pluggable)
• Wavelength: typical long‑reach single-mode optics (standard 1310 nm/1550 nm class as used in 1G LX optics)
• Power consumption: low-power SFP class (device-dependent)

How to use

Install the SFP transceiver into an empty SFP port on a compatible switch or router by aligning and gently pushing until it latches. Connect single-mode fiber with LC duplex connectors, ensuring proper transmit-to-receive alignment. Verify link status on the host device and configure the interface as required for speed, duplex and VLAN settings. When removing the module, power down the interface if recommended by the device vendor or use the host port administrative commands to safely deactivate the port before hot-removal.

Recommendations

Use single-mode fiber with appropriate attenuation and clean LC connectors to achieve reliable links up to 20 km. Avoid bending the fiber beyond its minimum bend radius and keep connectors protected when not in use. Confirm optical budget compatibility with transceivers at both ends and consult the switch/router vendor compatibility list if equipment interoperability requires verification.