U interface
U interface: For basic-rate access in an Integrated Services Digital Network (ISDN) environment, a user-to-network interface reference point that is characterized by the use of a 2-wire-loop transmission system that
- conveys information between the 4-wire user-to-network interface, i.e., the S/T reference point, and the local exchange,
- is located in the servicing central office, and
- is not as distance sensitive as a service using a T interface.
References
This article incorporates public domain material from Federal Standard 1037C. General Services Administration. Archived from the original on 2022-01-22.