LMI

In frame relay, a protocol that provides operational support for the user network interface (UNI). The LMI is a polling protocol between the frame relay access device (FRAD) and the network, which periodically verifies the existence and availability of the permanent virtual circuit (PVC), as well as the integrity of the UNI link. See also FRAD, frame relay, link, polling, protocol, PVC, and UNI.