Sorry, 40G QSFP+ transeivers that operate at an industrial temperature range are currently not available, but in development. Please stay tuned. By M***a on 03/17/2018

The FS.COM 40GBASE-CSR4 QSFP+ transceivers use 12 fibers OM4 MTP® Type B trunk cables for direct connection such as product #68017 and as for 10G to 40G network speed upgrade connection, 8 fibers OM4 MTP®-LC Type B harness cable #68047 can be applied. By J***y on 10/05/2017

It is highly recommended that a data center facility implement cleaning procedures for all fiber optic connectors to reduce link failures and unnecessary replacement of expensive and critical network equipment. Fiberstore FOPC-903 MTP®/MPO Cleaner is the best fiber cleaner for 40GBASE-CSR4 QSFP. By G***g on 06/03/2017

No. Network equipment manufacturers do not require that you use only name-brand optics. In fact, when a product fault or defect occurs in the network, and the fault or defect is not attributable to the use of third-party optics, they will continue to provide support for the affected product under warranty or covered by their support program. By M***n on 05/22/2017

We supply a huge volume of optics to a variety of customers, so in most cases we have all of the most popular optics in stock, ready to ship. However, some of the higher-value and specialized optics have a short lead time. You can find the stock information and the estimate delivery date from the product page easily, or contact sales@fs.com directly before you place the order. By B***y on 06/21/2017

The Fiberstore 40GBASE-CSR4 QSFP Modules extend the reach of the IEEE 40GBASE-SR4 interface to 300 and 400 meters on laser-optimized OM3 and OM4 multimode parallel fiber, respectively. By N***m on 05/15/2017