The term Network User Identification(NUI) stands for network user identification and is used in local networks and in access technology.
- In network technology, Network User Identification (NUI) is concerned with the network access authorization of terminal devices to the local network. With this identification, the station can log on to the system.
- In X.25 networks, the Network User Identification (NUI) is the connection-independent identifier for asynchronous access to Datex-P. The user identification used to be called subscriber identification and is used for identification and billing purposes. During connection transitions from telephone to Datex-P and from ISDN to Datex-P, the user must identify himself so that he can be charged for the connection. No network user ID is required when charges are taken over by the remote station.