Designed to reduce required rack-mount space, SEL ICON cube chassis brings wide-area communications to space-constrained locations. Combination of deterministic SONET transport technology with flexible Ethernet and TDM drop interfaces provides integrated protection, data, and voice communications solution in one platform. Networks created by SEL ICON support serial data, IEEE C37.94, transfer trip, DS1, analog 2-wire FXO/FXS, analog 4-wire interfaces, and Layer 2 Ethernet capabilities.