What is the Coretek CT-2125TSP-MB4L-E?
The Coretek CT-2125TSP-MB4L-E is a SFP optical transceiver module, listed by the manufacturer as "SFP with DDMI, 2.125Gb/s, 10km, Single Mode, Dual Fibre, 1310nm". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.