User Network Interface


Also found in: Acronyms.

User Network Interface

(communications, networking)
(UNI) An interface point between ATM end users and a private ATM switch, or between a private ATM switch and the public carrier ATM network.

The physical and protocol specifications for UNIs are defined by the ATM Forum's UNI documents, which allow for various types of physical interfaces.

See also: NNI
References in periodicals archive ?
Products in the demonstration included user network interface, protocol-compliant optical cross-connect switches, wavelength routers, metro optical devices, IP/MPLS routers, ATM switches, SONET/SDH multiplexers and other parts of the optical transport network.
The YTD423, the heart of the board, is Yamaha's high performance LSI for ISDN BRI user network interface function that includes Layer 1, Layer 2 and HDLC for 2 B-channels.