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The QSFP-40G-SR-BD is a 40 Gigabit Ethernet BiDirectional (BiDi) QSFP+ transceiver module designed for high-performance, short-reach data center and enterprise networking applications. Using BiDi technology, it enables 40G connectivity over a standard duplex LC multimode fiber, significantly reducing cabling costs by reusing existing 10G fiber infrastructure.
It provides a cost-effective migration path from 10G to 40G, making it ideal for modern high-density data center architectures.
- Supported on platforms with QSFP+ 40G ports
- Backward cabling compatibility with existing duplex multimode fiber
- Interoperable with BiDi technology for 10G → 40G migration
- High-speed interconnects in data centers
- Short-reach aggregation and spine-leaf architecture links
- Cost-effective 10G to 40G upgrades without re-cabling
- Enterprise core and distribution layer uplinks
Key Specifications – QSFP-40G-SR-BD
Specification Details
Form Factor QSFP+ (Quad Small Form-Factor Pluggable Plus)
Data Rate 40 Gbps aggregate throughput
Optical Technology BiDirectional (BiDi) 2×20 Gbps over duplex multimode fiber
Wavelengths 850 nm (Tx/Rx) and 910 nm (Tx/Rx)
Connector Type Duplex LC
Transmission Distance Up to 100 m on OM3 / Up to 150 m on OM4 multimode fiber
Power Consumption Typically < 3.5 W
Standards Compliance IEEE 802.3ba 40GBASE-SR4
Management Features Digital Optical Monitoring (DOM) support
Operating Temperature 0 °C to +70 °C
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