Using 12 or more ME1's with switch

We have need for using more than 12 ME1’s at a time and are having trouble finding a layer 2 network switch with POE and more than 8 ports! Any recommendations with make and model number of the switches you all have used successfully? We have tried cascading two 8 port EDImax switches without success (possibly wrong settings on our part?) but it seems like there should be a 16 port switch out there that works in this application. Thanks in advance.

POE+ is what you should looking for

some switches have a total power budget lower than the sum of the single ports
so not all ports will work on full power at the same time