In US enterprise and data center networks, short distance fiber links often carry heavy traffic and support high performance applications. The QSFP-40G-SR4-S module from Cisco is a short range 40 Gigabit multimode transceiver designed to deliver stable and efficient high speed connections for aggregation, spine leaf, and top of rack deployments. It is engineered to make the most of existing multimode fiber infrastructure while providing consistent throughput you can count on.

How the QSFP-40G-SR4-S Module Works

The QSFP-40G-SR4-S transceiver sends and receives 40 Gigabit Ethernet traffic over multimode fiber using four parallel optical lanes operating at 850 nm. This parallel design enables high capacity data transfer while keeping energy usage efficient and performance dependable, even in dense networking environments.

• Short Range 40G Support: Up to 150 meters on OM4 fiber.
• S Class Optimization: Focuses on essential performance features for practical deployment.
• Parallel Optics: Four lanes work together for high throughput performance.
• MPO Connector Interface: Designed for multimode fiber with standard MPO patching.
• Efficient Thermal Profile: Helps manage power and heat in high density racks.

Why US Networks Deploy QSFP-40G-SR4-S

Many networks consolidate several 10 Gigabit links into a single 40 Gigabit uplink to simplify cabling and improve performance. The QSFP-40G-SR4-S module supports this approach with reliable short range performance, helping organizations enhance capacity without major changes to existing fiber infrastructure.

At ORM Systems, this module is frequently selected by customers transitioning to higher capacity links or optimizing multimode fiber performance with optics that deliver predictable behavior.

Ideal Use Cases for QSFP-40G-SR4-S

• Spine and leaf switch interconnects
• Top of rack 40G uplinks
• High speed aggregation layer fiber links
• Enterprise multimode fiber networks
• Consolidation of multiple 10G connections

The Takeaway

The QSFP-40G-SR4-S module provides dependable, short range 40G connectivity for US organizations that need high throughput links using existing multimode cabling. Its efficient design, broad Cisco compatibility, and balanced performance make it a strong choice for scalable enterprise and data center networks.

If your infrastructure requires fast and reliable fiber connections over shorter distances, this transceiver delivers the performance and flexibility your network demands.