The UK edition
Cisco QSFP-40G-CSR4= network transceiver module Fiber optic 40000 Mbit/s QSFP+ 850 nm
£2,385.99

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Support for 40GBASE Ethernet. Hot-swappable input/output device that plugs into a 40-Gigabit Ethernet QSFP+ Cisco switch port. Flexibility of interface choice. Interoperable with other IEEE-compliant 40GBASE interfaces available in various form factors. Support for "pay-as-you-populate" model. Support for the Cisco quality identification (ID) feature which enables a Cisco switch to identify whether the module is certified and tested by Cisco. The Cisco® 40GBASE QSFP+ (Quad Small Form-Factor Pluggable Plus) modules offer customers a wide variety of high-density 40 Gigabit Ethernet connectivity options for data center, high-performance computing networks, enterprise core and distribution layer
