The ICX's are switches that have 2 code version for operations : depending on the requirement. > it has a switch variant of code : when loaded, will have the unit work as a L2 switch. > it had a router variant of code : when loaded, will have the unit work as a L3 Multi-layered Switch.
Under the Switch code variant. on the unit you will have the option to set only one IP interface for management and rest would work as a Layer 2 switch with vlans and other functions.
Under the Router code variant, on the unit you will have the option to set SVIs and much more with routing functionalities, depending on the requirement.
The ICX would be a part of the device's nomenclature for the product-line.
With respect to further details on the units : you can refer here : to know more on the specifications and capabilites. 7750 /7850 /7650 /7550 /7450 /7150 /8200 [ click on the model number to specs to load ]
With respect to configurations that can be done. The Management and configuration documentation should help further on that. click here to visit the page.
Checking on the difference I could find that on the ports in slot 2 (C) the same in 7150s work as uplink ports and they would not have half-duplex negotiation capacity unlike the posts in slot 1 (I) which work as downlink interfaces connecting to end-points. whereas the slot 3 (x) is for unlink and stacking as these are fiber interfaces. With respect to their nomenclature I will be checking and updating on this thread.
the Switch should be capable of both PoE/PoE+ depending on the variant : and the power delivery would happen based on the end point's PoE Negotiation with the switch.
to check if the power is leased out or being delivered:
if on code version 8095 and below : show inline-power show inline-power detail
show inline-power : this should be able to tell you if the End device on a port us using AF or AT power,