CIENA NTK553FC is a 50 GHz Wavelength Selective Switch (WSS) circuit pack with Optical Performance Monitor (OPM) for the C‑Band, provided in the 9x1 circuit-pack form factor for integration with the 6500 Packet-Optical Platform. In 9x1 configuration, it supports 50 GHz channel spacing across the C‑band and includes OPM to monitor the optical performance of the tracked wavelengths. This NTK553FC module is part of Ciena's 6500 photonics family and is designed to plug into a compatible 6500 shelf to enable WSS‑based spectral management in DWDM deployments; related variants in the same family include NTK553FAE5.
