Overview
The Ruijie GE-SFP-LH40-SM1310-BIDI is a 1.25 Gbps SFP single‑fibre bi‑directional (BiDi) optical transceiver for Gigabit Ethernet (1000BASE‑LH). It supports single‑mode fibre links up to 40 km using an LC BiDi interface (TX 1310 nm / RX 1550 nm). The complementary opposite‑wavelength module (TX1550/RX1310) is required at the remote end to form a working link.

• Supports 1000BASE‑LH at 1.25 Gbps (IEEE 802.3z).
• BiDi single‑fibre operation: TX 1310 nm / RX 1550 nm — pair with complementary module on other end.
• Maximum reach: up to 40 km over single‑mode fibre (SMF).
• SFP form factor (mini‑GBIC), hot‑pluggable and MSA compliant.
• Digital diagnostics monitoring (DDM/DOM) for optical power and temperature reporting.
• Low power consumption (≤ 1.5 W typical) and commercial operating range.

Use cases & compatibility
Ideal for point‑to‑point Gigabit links where single‑fibre BiDi connectivity reduces fibre count. Suitable for switches, routers, media converters and other devices with SFP slots. Note: some network vendors enforce vendor/part checks — confirm compatibility with your specific switch/router model where required.

Safety & compliance
RoHS compliant and Class 1 laser safety. Always follow official installation guidance and local regulations. If supplying into the UK/EU market, check device labelling requirements (UKCA/CE) and any applicable import or compliance obligations.

Important
To avoid installation errors, explicitly state that a complementary BiDi module (TX1550/RX1310) is required at the far end. If you require a formal Ruijie datasheet or verified compatibility list for specific switch models, request the datasheet download.