This power supply unit from Avaya is a genuine DPSN-20HB B model. It provides 48V and 417mA output and comes bundled with a power cord. The unit is suitable for use with conventional phone switching systems and PBXs. It has been manufactured in an unknown country/region and includes features such as power supply. This item is ideal for use in office and business environments and is listed under the categories of Phone Switching Systems & PBXs, Telecom Systems, Office, and Business & Industrial.