Description
The Sopto SPT-PB351G-LXXD + SPT-PB531G-LXXD pair of 1.25 Gbps BiDi SFP transceivers is optimized for single-fiber deployments where fiber resources are limited. By using complementary wavelengths (1310 nm and 1550 nm), the pair enables bi-directional transmission across a single strand of single-mode fiber, cutting infrastructure requirements in half compared to standard dual-fiber links.
Each module is compliant with IEEE 802.3z 1000BASE-LX/LH, SFP MSA, and SFF-8472 DDM standards, ensuring interoperability with a wide range of switches and routers. Hot-pluggable with standard LC simplex connectors, they support real-time diagnostics (DDM) for monitoring temperature, voltage, optical power, and module health.
Depending on the suffix (LXX), the modules support link distances of 1 km, 10 km, 20 km, or more on standard 9/125 µm SMF. With low power consumption (typically < 1 W) and wide operating temperature support in “D” versions, they are suited for enterprise networks, ISP access, FTTH, and campus environments.
By combining cost efficiency, easy deployment, and reliability, the SPT-PB351G / PB531G pair is a practical solution for operators who need to maximize fiber utilization without compromising performance.
Application
FTTH, Enterprise networks, ISP access, Metro/Campus networks, Single-fiber backbone links
Key Features
✅ 1.25 Gbps bi-directional transmission over a single SMF strand
✅ Pair: 1310 nm TX/1550 nm RX + 1550 nm TX/1310 nm RX
✅ Simplex LC optical interface
✅ Digital Diagnostics Monitoring (DDM) support
✅ Hot-pluggable SFP form factor
✅ Available for distances from 1 km up to 20 km+ (LXX variants)
✅ Power efficient (< 1 W typical)
✅ Compliant with IEEE 802.3z, SFP MSA, SFF-8472
