Data centers continue to evolve toward higher bandwidth fabrics, and flexibility is now one of the most important qualities of modern optical modules. The QSFP-40/100-SRBD module is Cisco’s bidirectional short range transceiver built to support both 40G and 100G operation over existing multimode fiber. It gives network teams an efficient way to upgrade bandwidth without replacing fiber infrastructure.

How the QSFP-40/100-SRBD Module Works

The QSFP-40/100-SRBD uses bidirectional optical signaling, meaning each fiber carries both transmit and receive wavelengths. This allows it to achieve high speed performance over duplex LC multimode fiber, which is already widely deployed in enterprise and data center environments. By supporting two speed modes, it offers a smooth transition path from 40G to 100G.

• Dual Speed Operation: Supports both 40G and 100G for flexible deployment.
• Bidirectional Optics: Uses two wavelengths on each fiber to maximize efficiency.
• Simple LC Connectivity: Works with standard duplex LC connectors.
• Cost Efficient Upgrade: Extend the life of existing MMF infrastructure.
• Hot Swappable: Install or replace modules without interrupting service.

Why Data Centers Choose QSFP-40/100-SRBD

Many organizations want to increase bandwidth without pulling new fiber or restructuring their network topology. The QSFP-40/100-SRBD offers that advantage by delivering high throughput using duplex multimode fiber. It is ideal for environments scaling virtualization, storage, AI clusters, or cloud workloads.

At ORM Systems, this module is often recommended for customers who want a strategic upgrade path. It lets them deploy 40G today and move to 100G later using the same optical infrastructure.

Where the QSFP-40/100-SRBD Module Delivers the Most Value

• Leaf spine architectures requiring flexible 40G and 100G links
• Data center clusters transitioning to higher bandwidth
• AI and high performance compute systems
• Short range MMF connections needing scalable performance
• Networks upgrading without replacing existing fiber

The Takeaway

The QSFP-40/100-SRBD module gives enterprises a practical and powerful way to boost capacity on short range fiber. Its dual speed capability, bidirectional optics, and LC connector support make it one of the most flexible transceivers for growing data centers.

For networks preparing to scale from 40G to 100G on existing multimode fiber, this module provides a smooth, cost effective upgrade path.