If you're using a regular network switch, there'll be no hazard connecting both PoE and non-PoE devices on the same modem, but the question is only data can be transmitted down the network cable since the regular network switch is not PoE-enabled to supply power over Ethernet. But is it possible to use the POE switch as a standard switch? Of course, it is doable! But, depending on your device, you must choose the switch that best supports your desires. For example, you can use either the POE or the regular switch. A regular switch, on the other hand, merely supplies the internet signal.