What is the Sandstone USFP-GB-SS243-D-R-ST?
The Sandstone USFP-GB-SS243-D-R-ST is a SFP optical transceiver module, listed by the manufacturer as "SFP-1,25Gbps-1490nmt/1310nmr-40km-BiDi-DDM-RoHS-US-RE-USFP-GB/SS243-D-R". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.