What is the Sandstone GLC-BX-D-40KM-ST?
The Sandstone GLC-BX-D-40KM-ST is a network/telecom equipment component, listed by the manufacturer as "1000BASE-BX40-D downstream Tx1550nm/Rx1310nm, CISCO COMPATIBLE". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.