The Ciena NTK525CFE5 is a 4x10G MUX OCI circuit pack for the Ciena 6500 Packet-Optical Platform, designed to multiplex four 10 Gbit/s client signals into a single OC-192/STM-64 optical line. This NTK525CFE5 variant is described as a 4xOC-192/STM-64/10GbE/OTU2/FC Mux OCI card used within the 6500 MXR/OCI subsystem to consolidate multiple 10G services. It supports OTU2 transport and remains compatible with 10 GbE and Fibre Channel client protocols, enabling high-density aggregation for multi-service deployments in a 6500-based network.
