What is the Cisco QSFP-40G-SR4-S-ST?
The Cisco QSFP-40G-SR4-S-ST is a QSFP optical transceiver module, listed by the manufacturer as "Cisco Compatible 40G QSFP+, 40GBASE-SR4, 850 nm, 150m MMF MPO12, DDM, C-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
