ABSTRACT: This document provides the view of Telcordia on generic requirements for metallic Digital Interface Systems (DIS's). It contains features, function, and performance requirements for DIS products. DIS's are manually operated devices used for the termination, connection, and signal test access of metallic digital and high-frequency analog signals. DIS products provide a low-cost physical interface for the following applications: Digital electronic cross-connect systems, head-end analog video, Synchronous Optical Network (SONET) STS-1 and STS-3 digital electrical signals, and an alternative to Digital Signal Cross-Connect (DSX) systems in traditional applications.