Fiber Optic Transceiver CBO SFP-1G-ZX-120KM — SFP 1.25Gbps, 120 km reach, single-mode

CBO SFP-1G-ZX-120KM is a fiber optic SFP transceiver module designed for 1.25 Gbps (SFP) data links over single-mode fiber with an approximate maximum reach of 120 km. The module follows the industry-standard SFP form factor and supports hot-pluggable installation for use in compatible switches, routers and media converters. It provides a long-distance optical uplink solution for telecom operators, ISPs and enterprise networks that require stable single-mode fiber connectivity.

Advantages

The transceiver delivers a 1.25 Gbps optical interface optimized for long-reach single-mode links up to 120 km, enabling extended-distance connectivity without intermediate regeneration. Its SFP form factor and hot-pluggable capability allow straightforward replacement or upgrade in existing equipment. The module is compatible with standard SFP slots and is designed for stable optical performance over extended runs, reducing the need for additional hardware in long-haul links.

Suitable for

• Long-distance uplinks between core and aggregation switches
• Metro and long-haul connections for ISPs and carriers
• Point-to-point links between data centers or campus buildings
• Fiber-based WAN links for enterprise networks

Key specifications

• Data rate: 1.25 Gbps (SFP)
• Fiber type: single-mode fiber (SMF)
• Maximum reach: approximately 120 km
• Optical interface: long-wavelength (ZX class) single-mode
• Form factor: SFP (hot-pluggable)
• Connector type: LC duplex
• Typical application: optical uplink for switches, routers and media converters

How to use

Install the module into a compatible SFP slot on a switch, router or media converter while the host device is powered on or according to the host manufacturer’s hot-swap instructions. Connect LC duplex single-mode fiber patch cables with correct polarity to the module and the remote device. Ensure transceiver wavelength and fiber type match on both ends and verify link status through the host device management interface. Follow standard handling precautions for optical modules to avoid contamination of fiber connectors and electrostatic damage.

Recommendations

For reliable long-reach operation, use single-mode fiber of suitable attenuation characteristics and verify end-to-end loss budgets for the planned 120 km span. Keep fiber connectors clean and use dust caps when the transceiver is not connected. Confirm compatibility with the host equipment’s SFP interface and firmware; if link issues occur, check polarity, patch cords, and receive/transmit alignment.