Thanks for the response. I was more thinking in line of a swich that you can set the voltage level at each port, or block of ports. For example on a 12 port switch, I could set ports 1 to 4 for 18V, ports 5 to 8 for 24V and ports 9 to 12 for 48VDC. Is anything like that available? Can I modify a switch to make it a POE switch by just putting the appropriate pins on the port at the voltage levels required. Pls advise.