Cisco QSFP-40G-SR-BD Transceiver

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  • Transceiver Type : SR-BD
  • Data rate : 40 Gbps
  • Media type : MMF
  • PN : 10-3317-03
  • Condition : New
  • Warranty : 15 days

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Cisco QSFP-40G-SR-BD Transceiver – High-Density 40G BiDi Optical Connectivity for Data Centers

The Cisco QSFP-40G-SR-BD Transceiver  is a high-performance, short-reach 40G optical module engineered for high-density 40 Gigabit Ethernet deployments using existing multimode fiber infrastructure. Unlike traditional parallel optics that require 8 fiber strands (4 transmit and 4 receive), this bidirectional (BiDi) transceiver leverages two fibers to transmit and receive data at 20Gbps in each direction, providing 40Gbps full-duplex connectivity through LC connectors.

Ideal for organizations that want to upgrade from 10G to 40G without replacing their existing OM3 or OM4 cabling, the Cisco QSFP-40G-SR-BD is a cost-effective and simplified migration path, particularly for data centers, enterprise networks, and campus backbones.

Key Features of Cisco QSFP-40G-SR-BD

  • Form Factor: QSFP+

  • Data Rate: 40 Gbps (4 x 10Gbps lanes aggregated)

  • Connector Type: LC Duplex

  • Wavelengths: 850nm and 910nm simultaneously (BiDi)

  • Distance Support:
    ▪ Up to 100m on OM3 fiber
    ▪ Up to 150m on OM4 fiber

  • Hot-swappable: Yes

  • Digital Optical Monitoring (DOM): Supported

  • Low power consumption: Typically less than 1.5W

  • Compatibility: Works with Cisco Nexus, Catalyst, and MDS platforms

Why Choose Cisco QSFP-40G-SR-BD?

The Cisco QSFP-40G-SR-BD transceiver allows network engineers to dramatically reduce the complexity of their 40G fiber upgrades. Traditional 40G modules such as QSFP-40G-SR4 require eight fibers and MTP connectors, but the SR-BD simplifies deployment by using standard LC-terminated duplex fiber—the same used for 10G optics.

This means there is no need to rip and replace the existing cabling infrastructure, helping businesses save on time, labor, and cost. It also allows for one-to-one port replacements on aggregation and core switches where existing 10G links are consolidated into 40G connections.

Use Cases of Cisco QSFP-40G-SR-BD

The Cisco QSFP-40G-SR-BD is optimized for high-bandwidth, short-reach applications, including:

  • 🟢 Data center fabric upgrades from 10G to 40G

  • 🟢 Aggregation uplinks between top-of-rack and core switches

  • 🟢 Enterprise LAN backbones requiring scalable bandwidth

  • 🟢 Campus network distribution layers

  • 🟢 Server virtualization environments with large east-west traffic

  • 🟢 Cloud access layers demanding high throughput and low latency

Thanks to its plug-and-play architecture and high port density, it’s an excellent fit for high-availability, low-latency environments.

Technical Advantages

Using bidirectional optics, the Cisco QSFP-40G-SR-BD module transmits at 850nm and receives at 910nm on the same fiber strand, and vice versa. This technology is fully compliant with Cisco’s proprietary BiDi optical specifications and offers:

  • ✅ Seamless integration with Cisco Nexus & Catalyst switches

  • ✅ Zero re-cabling when upgrading from 10G LC-Duplex links

  • ✅ Lower total cost of ownership (TCO)

  • ✅ Reduced power usage and heat output

  • ✅ Simplified patch panel and trunk management

This module not only increases port efficiency but also reduces the chances of fiber misconnection due to LC-standardization.

Enhanced Scalability and Investment Protection

One of the greatest strengths of the Cisco QSFP-40G-SR-BD transceiver is how well it supports network scalability without forcing organizations to reinvest in physical cabling. As bandwidth demands rise with applications like AI/ML processing, high-definition video streaming, and large-scale data replication, this transceiver offers an immediate pathway to higher speeds using the infrastructure already in place.

IT teams benefit from easier planning, quicker deployment, and reduced operational costs, all while maintaining compatibility with Cisco’s switching and routing platforms. Whether you’re running a virtualized server farm, designing a multi-tenant data center, or optimizing your SAN environment, the Cisco QSFP-40G-SR-BD helps maintain long-term ROI by enabling smooth transitions and future-ready performance.

Conclusion

The Cisco QSFP-40G-SR-BD transceiver represents a smart, scalable, and cost-effective solution for organizations looking to modernize their networks without disrupting existing infrastructure. By supporting 40G BiDi over duplex LC multimode fiber, it enables quick transitions from legacy 10G environments with minimal investment and no need for new cabling.

Its proven performance, high compatibility with Cisco devices, and low power profile make it an ideal choice for high-density data centers, core switching platforms, and enterprise network upgrades. With the Cisco QSFP-40G-SR-BD, you’re investing in future-ready optical networking technology that’s built for speed, simplicity, and efficiency.

Brand

Cisco

Part number

10-3317-03

Model

QSFP-40G-SR-BD

From factor

QSFP+

Transceiver Type

SR BD (Short Range Bi-Directional)

Cable type

Multi-mode Fiber (MMF)

Cable distance

Up to 100 meters on OM3 MMF and up to 150 meters on OM4 MMF

Connector

LC Duplex

Max Data rate

41.25 Gb/s

Wavelength

832 nm / 918 nm

Operating Temperature Range

Standard: 0°C to 70°C
Industrial: -40°C to 85°C

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