In telecommunications, a user–network interface (UNI) is a demarcation point between the responsibility of the service provider and the responsibility of the subscriber. This is distinct from a network-to-network interface (NNI), which defines a similar interface between provider networks.
Specifications defining a UNI
Metro Ethernet Forum The Metro Ethernet Forum's Metro Ethernet Network UNI specification defines a bidirectional Ethernet reference point for Ethernet service delivery.
Optical Internetworking Forum The Optical Internetworking Forum defines a UNI software interface for user systems to request a network connection from an ASON/GMPLS control plane.
See also Network termination
External links Metro Ethernet Forum