Definitions for "U-Interface"
adj. Specifies an ISDN communications device that connects directly to an ISDN telephone line. A U-interface device contains its own network terminator (NT1).
Carries the ISDN signals over over a single pair of wires between a subscriber's location and the Central Office.
A 2-wire ISDN interface from an ISDN line to the central office; the most common ISDN interface.