What is the Sandstone SFP-10G-SR-X-ST?
The Sandstone SFP-10G-SR-X-ST is a SFP+ optical transceiver, listed by the manufacturer as "Cisco SFP-10G-SR-X Compatible 10GBASE-SR/SW SFP+ 850nm 300m DOM Duplex LC/UPC MMF Optical Transceiver Module". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.