Marconi Ericsson 151-2975/53 Marconi/Ericsson SMA/OMS/MSH SDH transmission Power Supply

The Marconi Ericsson 151-2975/53 is a power supply and alarm connection unit for Marconi transmission equipment. Units of this type sit at the interface between the equipment shelf and the exchange infrastructure around it, taking in the site DC feed and distributing it to the shelf while presenting the alarm contacts that report equipment status to the station alarm system. That dual role matters in a telecoms exchange, where equipment is unmanned and faults have to be signalled to a central point through hard-wired contacts rather than only through the management network. Connection units are specific to the shelf and rack they serve, so the exact platform variant should be confirmed against the equipment before ordering rather than assumed from the part number alone. Marconi’s transmission portfolio passed to Ericsson in 2006. Tech-Star, UK-based and shipping worldwide, supplies Marconi transmission components for network maintenance, and we can check compatibility against your shelf on request.