What is the Sandstone PAN-QSFP-40GBASE-LR4-ST?
The Sandstone PAN-QSFP-40GBASE-LR4-ST is a QSFP optical transceiver module, listed by the manufacturer as "Compatible QSFP+; Data Rate: 40G 41.25Gbps; Wavelength: 1310nm; Distance: 10km; Connector: Dual LC". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.