CISCO 

CISCO QSFP-40G-CSR-S= 40GBASE-CSR QSFP TRANSCEIVER MO W/LC CONNECTOR

Mfg Part Number:  QSFP-40G-CSR-S=  
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Last Updated: May 27, 2025
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Cisco QSFP-40G-CSR-S (S-Class)

The QSFP-40G-CSR-S is a pluggable optical transceiver with a duplex LC connector interface used for connectivity using MultiMode Fiber (MMF). The Cisco 40GBASE-CSR Modules support link lengths of 300 meters and 400 meters, respectively, on laser-optimized OM3 and OM4 multimode fibers. Customers benefit through the reuse of their existing 10 gigabit duplex MMF infrastructure as they migrate to 40 Gigabit Ethernet, while maintaining the same supported link distances as 10G Ethernet. Each QSFP-40G-CSR-S operates at four different wavelengths. Each of the four wavelengths operates at 10G over existing duplex multimode fiber using standard LC connectors. The Cisco QSFP-40G-CSR-S transceiver supports FCoE.

Main Specification
General Information
Manufacturer Cisco Systems, Inc
Manufacturer Part Number QSFP-40G-CSR-S=
Manufacturer Website Address http://www.cisco.com
Brand Name Cisco
Product Name 40GBASE-CSR QSFP Module for Duplex MMF
Product Type QSFP
Technical Information
Application/Usage Optical Network
Application/Usage Data Networking
Interfaces/Ports
Total Number of Ports 1
Connector Type LC
Interfaces/Ports Details 1 x LC Duplex 40GBase-SR Network
Media & Performance
Media Type Supported Optical Fiber
Fiber Mode Supported Multi-mode
Ethernet Technology 40 Gigabit Ethernet
Network Technology 40GBase-SR
Network Technology 40GBase-CSR
Physical Characteristics
Form Factor Hot-swappable
Miscellaneous
Compatibility

MSA Compliant

WARNING:: The plastic used in cable products can expose you to lead and lead components, chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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