You can use a POE Injector and a POE Pspliter as an alternative

@BasM 

you can use this POE kit if you don't have POE switch.

https://www.tp-link.com/en/business-networking/accessory/tl-poe200/

if you already have POE switch, you can use a POE spliter:

https://www.tp-link.com/en/business-networking/accessory/tl-poe10r/

Salve chiedo un'informazione tale procedura è possibile anche alimentare un Deco M4 ..... 

Tutte le unità Deco M4 saranno alimentate attraverso lo switch sg1008pe. 

Tutte le unità M4 saranno configurate come Access Point dato che come Ruoter prioritario, tutta la lan sarà gestita da un tp-link R600vpn. 

 Hi, I ask for information this procedure is also possible to feed a Deco M4 .....

 All Deco M4 units will be powered through the sg1008pe switch.

 All M4 units will be configured as Access Point since as priority Ruoter, the whole LAN will be managed by a R600vpn tp-link.

@Kevin_Z 

if I wanted to replace my UBNT Poe APs with Deco if I pull out the brown wires and use power pigtails would that work? 

@BasM 

Thank you for posting the updates 

So if I'm correct 

You have tp link switch poe supported 

And used the poe function (cable) 

To you mesh M9 plus router and put a 

Poe splitter there (on the and of the cable)

And clicked it in to the router 

And it worked.

My question is 

I have a switch on the ground floor 

TP-Link T2600G-28mps 

And like to put the 

TP-LINK deco M9plus mesh router 3pack 

One next to the switch and the other 2 

On the first and second floor with poe cable

So what is the maximum voltage required for the other 2 routers 

As I Read it above its works right with this setting 

Thank you in advance 

@BasM Hi 

I too am interested in setting up a Deco M9 with PoE. WOuld you mnd sharing what splitters and router you used ? Many thanks