Now I bought a device with POE, since I was there where it should be installed have no electricity.
Because this is a high-quality part of a brand manufacturers, I thought initially to buy me a Gigabit PoE switch.
This makes, in my case, however no real sense, because then I would not be only a PoE port need and the other is in use.
Also for the "normal" Gigabit they are useless.
So I informed me about POE injectors and have read a lot of reviews here. It should come priced near a POE switches in no case the POE Injector.
Otherwise I would have the injector, thereby an additional device with extra cables can save.
These injectors are available in a variety of price ranges. The TP-Link injector was about the cheapest but the best rated. So I took the purchase and was not disappointed so far.
It was a small black plastic box. It is the latest V3 with Gigabit as it is shown here with power supply. A short UTP network cable even was. A diode of status. I joined the POE-consumer and the diode switched to "green". So everything ok.
The system is now a couple of days in use and working properly. Of course I can not make any long-term rating to me.
4/5 star I forgive because there wertigere injectors.
VoIP phones are definitely better as can be read here. Naturally have their price.
But for me, as I said, the most important function.
The device will disappear anyway under the desk. Long-term experience missing.