What is the Ciena NTK536FB?
The Ciena NTK536FB is a XFP optical transceiver module, listed by the manufacturer as "EMOTR 4X XFP/8X SFP+/32X SFP CIRCUIT PACK". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
CircularTelecomParts Catalogue

Part Overview
Looking for the Ciena NTK536FB? This XFP optical transceiver module, described by the manufacturer as "EMOTR 4X XFP/8X SFP+/32X SFP CIRCUIT PACK", is stocked and resold through Circular Telecom's refurbished and surplus telecom equipment network.
Common Questions
The Ciena NTK536FB is a XFP optical transceiver module, listed by the manufacturer as "EMOTR 4X XFP/8X SFP+/32X SFP CIRCUIT PACK". 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 NTK536FB, subject to current availability. Contact Circular Telecom for a live quote.
Circular Telecom Catalogue