What is the Sandstone 7SM-000-ST?
The Sandstone 7SM-000-ST is a SFP optical transceiver module, listed by the manufacturer as "GigESFP, MM, 850nm, VCSEL, 550m, LC (SFP-1000-MM-850) Accedian Compatible". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.