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User–network interface
open-in-new
<p>In <a href="/facts/Telecommunications/vxoj1cxR">telecommunications</a>, a user–network interface (UNI) is a <a href="/facts/Demarcation_point/SY4SRnnh">demarcation point</a> between the responsibility of the service provider and the responsibility of the subscriber. This is distinct from a <a href="/facts/Network-to-network_interface/wDf1D4KE">network-to-network interface</a> (NNI) that defines a similar interface between provider networks. </p>