@David-TP The Deco P9 are set-up in wireless router mode. the first Deco is attached to the router from the ISP. The Deco was initiated into the network close to the primary Deco. then moved to the...

The house were the P9 are used is from the 14th century and built with very thick rock walls. I chose to use a PLC based solution in order to get to all the dead areas. All is fine until I add unit...