You can safely coupling Freeplugs with the CPL, but the debit network and mounted vote will be very limited by Freeplugs.
The interest is to simply replace the Freeplugs by these PLC modules for a super fast network.
Everything will then work perfectly ... except your FreePlayer that will not be seen! In other words, your FreePlayer never appear on your network and will therefore completely inoperative!
I called the DEVOLO media about it, I must send a descriptive email and perhaps a set with firmware update will fix one day this big bug.
Meanwhile, owners of FreeBox, FLEE !! Instead, take the version 500 Mbit / s (; ie = UTF8 & qid = 1423229001 & sr = 1-6 & keywords = dlan + 500 + wifi) which works wonderfully with FreePlayer.