What is the Sandstone DGS-712-ST?
The Sandstone DGS-712-ST is a SFP optical transceiver module, listed by the manufacturer as "D-Link Compatible Multi-Rate SFP, 1000BASE-T, 100m COPPER RJ45, NO DDM, C-Temp, GOLD Latch, 88h, RXLOS=DIS, TXDIS=DIS". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.