What is the Ciena NTK555JA?
The Ciena NTK555JA is a circuit card / line card, listed by the manufacturer as "440 6500 SP-3 CIRCUIT CARD". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
CircularTelecomParts Catalogue

Part Overview
Manufactured by Ciena, the NTK555JA (440 6500 SP-3 CIRCUIT CARD) is a circuit card / line card. Circular Telecom sources, tests, and resells surplus and refurbished Ciena equipment like this as part of a lower-carbon alternative to new procurement.
Common Questions
The Ciena NTK555JA is a circuit card / line card, listed by the manufacturer as "440 6500 SP-3 CIRCUIT CARD". 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 NTK555JA, subject to current availability. Contact Circular Telecom for a live quote.
Circular Telecom Catalogue