The Ciena NTK538DR is a WaveLogic Ai (WLAi) MOTR circuit pack for the Ciena 6500 platform — a single-slot module with 4x QSFP28 client ports supporting OTU4 or 100GE connections over a programmable 400G coherent line interface.
It’s built for operators consolidating client interfaces onto fewer, more capable coherent transport slots. TelecomLeasing offers tested Ciena 6500 circuit packs for purchase or lease.