What is the Sandstone 109537902-ST?
The Sandstone 109537902-ST is a XFP optical transceiver module, listed by the manufacturer as "Alcatel / Lucent Compatible 10G XFP, 10GBASE-LR, OC192-SR1, STM64-I64.1, 1310 nm, 10km SMF LC, DDM, E-Temp". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.