What is the Ciena OPT-52D-UL?
The Ciena OPT-52D-UL is a SFP optical transceiver module, listed by the manufacturer as "SFP". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
CircularTelecomParts Catalogue

Part Overview
The OPT-52D-UL is a SFP optical transceiver module manufactured by Ciena. Listed by the manufacturer as "SFP", it is available through Circular Telecom's surplus and refurbished network equipment marketplace as a sustainable, tested alternative to buying new.
Common Questions
The Ciena OPT-52D-UL is a SFP optical transceiver module, listed by the manufacturer as "SFP". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
Circular Telecom sources and resells surplus and refurbished Ciena network equipment, including parts such as the OPT-52D-UL, subject to current availability. Contact Circular Telecom for a live quote.
Circular Telecom Catalogue