Hi, first off I am NOT an IT guy. Im trying to help our IT guy out who is trying to use a Catalyst 2950G-24-EI-DC switch he has (inherited) but cannot locate the power supply for it. I have the manual but cannot for the life of me find where the -36 to -72VDC the unit requires is suppossed to come from. Is there a separate power supply for this? I cannot seem to find a p/n if there is. I can only find references to the "DC switch kit" which contains the connector and associated hardware only. Any help would be appreciated.