What is the ADTRAN 1184561PG3?
The ADTRAN 1184561PG3 is a SFP optical transceiver module, listed by the manufacturer as "1000BASE-SX SFP 850nm 550m DOM Duplex LC/UPC MMF Optical Transceiver Module (Industrial)". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.