Patch Cord is needed for a QSFP Transceiver
Switches are the first connecting devices that aggregate the 40G links; in order to achieve that, 40G transmission networks need advanced switches with matching patch cords and transceiver modules. Many servers in data centers today can support Ethernet transmissions of 40G where 40G QSFP transceivers are considered to be the most economical solution for these high-speed links.
Difference between Single-mode and Multimode Fiber Patch Cords for QSFPs The first factor that needs to be considered is the cable fiber type. This is because of the transmission characteristic optical signals of the fiber optic QSFP module. The optical signals perform different over different wavelengths. And optical signals with the same wavelength perform totally different when they run through different types of cables.