The Cisco® 40GBASE QSFP (Quad Small Form-Factor Pluggable) portfolio offers customers a wide variety of high-density and low-power 40 Gigabit Ethernet connectivity options for data center, high-performance computing networks, enterprise core and distribution layers, and service provider applications.
Features and Benefits of Cisco QSFP Modules
- Hot-swappable input/output device that plugs into a 40 Gigabit Ethernet Cisco QSFP port
 - Interoperable with other IEEE-compliant 40GBASE interfaces where applicable
 - Certified and tested on Cisco QSFP 40G ports for superior performance, quality, and reliability
 - High-speed electrical interface compliant to the IEEE 802.3ba standard
 - QSFP Form factor, 2-wire I2C communication interface and other low-speed electrical interface compliant to SFF 8436 and QSFP Multisource Agreement (MSA)
 
| No. | Product | Type | Connector Type | 
| 1 | QSFP-40G-SR4-S | 40GBASE-SR4, 4 lanes, 850 nm MMF | MPO-12 | 
| 2 | QSFP-40G-LR4-S | 40GBASE-LR4, 1310 nm, SMF | LC | 
| 3 | QSFP-40G-SR-BD | 40GBASE-SR-BiDi, duplex MMF | LC | 
| 4 | QSFP-40G-BD-RX | 40GBASE-SR-BiDi, duplex MMF, Monitor | LC | 
| 5 | QSFP-40G-SR4 | 40GBASE-SR4, 4 lanes, 850 nm MMF | MPO-12 | 
| 6 | FET-40G | Fabric Extender, 4 lanes, 850 nm MMF | MPO-12 | 
| 7 | QSFP-40G-CSR4 | 40GBASE-CSR4, 4 lanes, 850 nm MMF | MPO-12 | 
| 8 | WSP-Q40GLR4L | 40GBASE-LR4-Lite, 1310 nm, SMF | LC | 
| 9 | QSFP-4X10G-LR-S | 4x10GBASE-LR | MPO-12 | 
| 10 | QSFP-40G-LR4 | 40GBASE-LR4, 1310 nm, SMF with OTU3 data-rate support | LC | 
| 11 | QSFP-40G-ER4 | 40GBASE-ER4, 1310 nm, SMF with OTU3 data-rate support | LC |