PSE Hear it!

PSE (Power Sourcing Equipment) Telecom Definition

In power over Ethernet (PoE), equipment that serves as power injectors to provide output of 48V DC power over the twisted-pair cable plant to terminal units with PoEcompliant devices known as powered devices (PDs). For devices not PoE-compliant, splitters inserted into the Ethernet cabling provide 12V or 6V DC output. See also DC, PoE, and splitter.