Nortel AL1905B03-E5 (telecommunications transmission and networking portfolio) Power Supply

The Nortel AL1905B03-E5 is a 300W AC power supply for the Ethernet Routing Switch (ERS) 5600 series, dual-branded Nortel/Avaya reflecting Avaya’s 2009 acquisition of Nortel’s enterprise networking business. The ERS 5600 was Nortel’s stackable, modular chassis switch family for the wiring closet and small-to-medium campus core, and this power supply is a field-replaceable unit that slots into the chassis power bay to feed the switch and any populated line modules. Genuine ERS 5600 power supplies of this generation remain a routine replacement item where an original unit has failed or where redundant supply capacity is being restored. Confirm the exact ERS 5600 chassis model and required supply wattage against your installation before ordering, since the series was also sold with higher-capacity supply options for larger chassis configurations. Tech-Star (UK-based, shipped worldwide) stocks Nortel/Avaya switching hardware to support ongoing network maintenance projects.