What is the Ciena NTK539QK?
The Ciena NTK539QK is a network/telecom equipment component, listed by the manufacturer as "FLEX3 WL3E OCLD ENHANCED W/ EDFA NXOTU4 C-BAND CIRCUIT PACK + RTU3 ``S11-1COPTAPP-RTU3"". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
