Hi,  I would like to set up an EasyMesh network using an Archer A6 and a TL-WPA7617 Powerline device

I understand that the Archer A6 supports ethernet backhaul but does that mean ethernet backhaul also works when the Archer C6 is in Access Point mode?

The reason for Access Point mode is because I need to keep my ISP router as it supports a VoIP service for legacy phones in the house.

The term 'main router' is used in the TL-WPA7617 but does that mean the 'main Easymesh router' (which can be attached in Access Point mode to the ISP router) or the router that is connected to the internet?

As a supplementary question assuming Ethernet backhaul is supported in Access Point mode would I connect the Powerline devices to the ISP router or to the Archer C6?

Sorry for all the questions but it seems the devil is in the detail with EasyMesh :) 

Thanks in advance 

Daniel