The Cudy SM100GSB-20AB is a pair of bi-directional 1.25Gbps SFP optical transceivers engineered to provide dependable, high-speed single-mode fibre connectivity over long distances for modern enterprise and domestic networking equipment. Supplied as an operational pair featuring distinct wavelengths, these modules enable duplex transmission across a single optical strand, reducing infrastructure costs.
Technical Specifications
- Manufacturer: Cudy
- Part Number: SM100GSB-20AB
- Product Type: 1.25Gbps Bi-Directional (BiDi) Single-Mode SFP Optical Transceiver Pair
- Transmission Distance: Up to 20 km on Single-Mode Fibre (SMF)
- Data Rate: Up to 1.25 Gbps
- Optical Connectors: Simplex LC connectors
- Wavelengths & Components (Module A): 1310nm FP Laser and 1550nm PIN photodetector (SM100GSB-20A)
- Wavelengths & Components (Module B): 1550nm DFB Laser and 1310nm PIN photodetector (SM100GSB-20B)
- Power Supply: Single +3.3V power supply
- Data Interface: LVPECL-compatible data input/output interface
- Compliance: RoHS compliant and SFF-8472 standard compatible
- Protection & Housing: Metal housing with low electromagnetic interference (EMI) and electrostatic discharge (ESD) protection
Key Features
- Single-Fibre Bi-Directional Technology: Utilises two unique wavelengths (TX and RX) on the same optical strand to facilitate full duplex transmission, significantly lowering overall fibre installation and cabling expenses.
- Long-Distance Deployment: Optimised for robust data transmission over single-mode fibre infrastructure up to a distance of 20 kilometres.
- Cross-Vendor Compatibility: Designed within a standard SFP package to ensure broad compatibility with multi-vendor switches, media converters, and routers equipped with SFP slots.
- Enhanced Signal Integrity: Built with low EMI emissions and superior ESD protection to maintain steady, interference-free network performance in demanding environments.





