Fiber Optic Transceiver CBO GSLC20-BiDi-A-DDM 1.25G 1310/1550nm Single-Channel Bidirectional

The BlueOptics Fiber Optic Transceiver CBO GSLC20-BiDi-A-DDM 1.25G 1310/1550nm Single-Channel Bidirectional is a compact SFP module designed for single-channel bidirectional fiber links. It supports a 1.25 Gbps data rate and transmits and receives on two separate wavelengths (1310 nm and 1550 nm) over a single fiber, enabling long-reach connections while occupying a standard SFP slot. The module includes Digital Diagnostic Monitoring (DDM) to report real-time operating parameters such as temperature, optical power, and supply voltage.

Advantages

This transceiver provides bidirectional transmission over a single fiber, reducing cabling requirements and installation complexity for point-to-point links. Its SFP form factor offers hot-pluggable convenience and compatibility with a wide range of switches and routers that accept standard SFP modules. Integrated DDM enables proactive monitoring of module health and link performance, useful for maintenance and troubleshooting. The module is suitable for long-reach single-channel applications while maintaining a compact footprint.

Suitable for

• Point-to-point fiber links between buildings or remote sites
• ISP access links and enterprise uplinks requiring single-fiber BiDi transmission
• Upgrading or expanding network equipment with standard SFP slots
• Fiber infrastructure where reduced cable count is desired

Key specifications

• Data rate: 1.25 Gbps
• Wavelengths: 1310 nm / 1550 nm (bidirectional on single fiber)
• Form factor: SFP (hot-pluggable)
• Reach: designed for long-reach single-channel links (typical distances depend on fiber type and link budget)
• Monitoring: Digital Diagnostic Monitoring (DDM) for temperature, optical power, and voltage
• Connector type: compatible with standard single-fiber connectors (LC-style single-fiber adapters typical for BiDi modules)
• Power consumption: low-power SFP class module (specific consumption depends on host device implementation)

How to use

Install the module into an available SFP slot on compatible network equipment while the host device is powered on or off, as the SFP form factor supports hot-plugging. Connect the single fiber using the appropriate single-fiber LC adapter or patch cord, observing the correct orientation for transmit and receive wavelengths as required by the link (one end transmitting on 1310 nm and receiving on 1550 nm, the other end reversed). Verify link status and use the DDM readouts via the host device management interface to monitor optical power levels, temperature, and supply voltage.

Recommendations

Use clean connectors and follow standard fiber handling procedures to avoid signal loss. Match the module wavelength orientation between link endpoints and confirm compatibility with the host device firmware. Monitor DDM parameters after installation to ensure the link operates within expected margins and perform periodic inspections of fiber connections.