Ruijie GE-SFP-LX20-SM1310-BIDI — 1.25 Gbps single-fibre (BIDI) SFP

• 1.25 Gbps (1000BASE-LX) SFP transceiver for single-mode fibre using BIDI (single-fibre) operation — TX 1310 nm / RX 1550 nm.
• Designed for point-to-point links up to 20 km over 9/125 µm SMF; hot-pluggable SFP MSA form factor with Digital Optical Monitoring (DDM/DOM).
• Low power consumption (≤ 1.5 W typical). Class 1 laser device and RoHS compliant (refer to vendor datasheet for full certifications).

Who this is for

• Network engineers and contractors deploying fibre links where saving fibre strands is important (campus links, ISP aggregation, industrial sites).
• IT teams upgrading or extending Gigabit Ethernet links without running extra fibre — pairs with the complementary BIDI unit (opposite TX/RX wavelengths).

Installation & safety

• Hot-pluggable into standard SFP ports. Ensure device compatibility (vendor lock/recognition issues can occur with some switch vendors); test in your hardware before full deployment.
• Observe laser safety precautions when handling optical transceivers. Verify CE/UKCA or other regional certification with your supplier if required for compliance in your jurisdiction.

Notes: For full optical budgets (Tx power, Rx sensitivity) and exact DOM registers, consult the Ruijie product datasheet / installation manual. If required I can extract the precise dBm figures from the official PDF.