Optical QSFP Transceiver BlueOptics BO25K856S2D 40GBASE-SR2-BIDI up to 100 m

The BlueOptics BO25K856S2D QSFP transceiver is designed for 40GBASE-SR2-BIDI short-range multimode fiber links and supports data rates up to 40 Gbps. Housed in a QSFP form factor, this optical module enables bidirectional two-lane operation over multimode fiber with a reach of up to 100 meters, making it suitable for high-density switch and router interfaces in data center and campus environments. The module is intended for sockets and devices that accept QSFP optical transceivers and supports standard 40GBASE-SR2-BIDI signaling for interoperable fiber connections.

Advantages

The transceiver offers a compact QSFP footprint that consolidates high-speed connectivity into a single module while keeping port density high. Its bidirectional SR2 optical design reduces fiber cabling requirements by enabling two-way transmission over paired multimode fibers. Support for standard 40GBASE-SR2-BIDI signaling ensures compatibility with equipment that follows common optical interface specifications. The module is optimized for short-reach links up to 100 meters, providing a predictable performance profile for multimode fiber infrastructures.

Suitable for

• 40 Gbps short-range uplinks between switches in data centers and server rooms
• Interconnects on campus networks where multimode fiber is deployed
• High-density aggregation ports on routers and optical switches supporting QSFP
• Deployments requiring bidirectional SR2 links to minimize fiber cabling

Key specifications

• Form factor: QSFP (Quad Small Form-factor Pluggable)
• Standard: 40GBASE-SR2-BIDI
• Data rate: 40 Gbps aggregate
• Fiber type: Multimode fiber (MMF)
• Maximum reach: up to 100 meters on appropriate multimode fiber
• Wavelength/lanes: Bidirectional two-lane operation (BIDI SR2)

How to use

Install the transceiver into a compatible QSFP port on a switch, router or optical interface module following the host device manufacturer’s hot-plug instructions. Connect multimode fiber cables with the correct MPO/LC or vendor-specified connectors and ensure polarity and lane mapping match the paired transceiver at the remote end. Verify link status via the host device LEDs or management interface and confirm that the port is configured for 40G operation. For best results, use multimode fiber of appropriate grade and maintain clean connector end-faces before mating.

Recommendations

Use this module in multimode fiber installations with verified fiber type and link loss budgets; clean and inspect connectors before installation and ensure the host device supports 40GBASE-SR2-BIDI QSFP transceivers. For reaches approaching 100 meters, confirm fiber modal bandwidth and connector/patch panel losses to maintain reliable link performance.