Industrial AUA61D 5SLI1A4AAB Line Interface Module

Industrial AUA61D 5SLI1A4AAB Line Interface Module is a Lucent/AT&T SLC-5 DSX COT/RT Line Interface Unit (LIU) designed for installation in SLC-5 DSX cross-connect frames. The part number AUA61D 5SLI1A4AAB identifies this LIU, which has been removed from working service, indicating a used condition suitable for salvage, repair, or decommission projects. In telecom infrastructure, LIUs provide the interface between subscriber line circuits and the DSX switching fabric, handling the physical and signaling connection to individual lines within the SLC-5 DSX system. This module would typically reside in a central office or remote terminal environment where legacy SLC-5 DSX equipment remains in operation, enabling continued service without full system replacement. As a documented Lucent/AT&T LIU, it aligns with the historical designs of SLC-5 DSX COT/RT installations and is commonly sought by technicians for replacement parts, inventory refresh, or retrofitting tasks on aging exchange hardware.