Ciena NTK529SDE5 40G Network Interface Card Module

The Ciena NTK529SDE5 is a 40G OCI circuit-pack module for the 6500 Series Packet-Optical Platform, delivering a single client-facing 40 Gbps interface that maps to a 43 Gbps line-rate (1x40G-43G). It supports OC-768/STM-256/OTU3 mapping on the OTN path, enabling SONET/SDH and OTN services within the 6500 architecture. Designed for use in 6500 D/S-Series shelves, the NTK529SDE5 sits in the modular circuit-pack ecosystem that allows operators to mix 40G OCI capacity with other service cards to tailor high-capacity transport. This variant denotes 40G OCI functionality with 40/43G OCI mapping, making it suitable for deployments requiring a 40 Gbps client interface and OC-768/STM-256/OTU3 compatibility in backbone or metro networks while leveraging the 6500 platform’s OTN switching capabilities. In practice, it enables circuit-switched transport options alongside packet/OTN services in a scalable, multi-service transport environment.