
TP-Link Deco M9 Plus Triband WLAN Mesh Set of 1 (AC2200)
TP-Link Deco M9 Plus Triband WLAN Mesh Set of 1 (AC2200)
Yes, they identical. I have grouped together Deco M5 units from different purchases and can confirm that it works.
Yes, the first Deco must always be connected to the existing router with a LAN cable. It serves as the source for the Internet signal and a permanent and stable connection via LAN cable is very important.
Yes, that is no problem, all Deco systems are compatible with each other. If HomeCare is used, you would only have to make sure that the new router is also HomeCare-capable, but that would be the case with the Deco M9 Plus. You can also add more Deco M5s if that would be an alternative.
Yes, this is possible without any problems, all Deco systems can be combined with each other. You can simply add new WLAN mesh routers from the Deco series to the existing Deco system.
https://www.digitec.ch/Comparison/9868648-6337217