What is the Fs Com QSFP-SR4-40G?
The Fs Com QSFP-SR4-40G is a QSFP optical transceiver module, listed by the manufacturer as "QSFP-40G-SR4 Compatible QSFP+ 40GBASE-SR4 850nm 150m DOM MPO-12/UPC MMF Optical Transceiver Module, Support 4 x 10G-SR". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.