What is the Extremenet 16404?
The Extremenet 16404 is a SFP optical transceiver module, listed by the manufacturer as "X460-48p 48 10/100/1000BASE-T PoE-plus, 4 100/1000BASE-X unpopulated SFP, XGM3 slot,". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.