A Node Line Card (NLC) is an interface card for the Cisco 6400. Logically, the NLC forms the physical interfaces of the NSP.The DS3 node line card (NLC) is a component module for the Cisco 6400 Universal Access Concentrator. Each DS3 NLC supports two ATM interfaces for connection to network services. The DS3 NLC, like all components of the Cisco 6400, supports online insertion and removal. You can install a DS3 NLC in the Cisco 6400 chassis without having to power down the system. Similarly, a DS3 NLC can be removed without interrupting the operation of other components of the Cisco 6400.