No such a feature. You should look for a 3G/4G router. http://www.tp-link.com/en/products/?categoryid=202

RizzA, reset the device to factory defaults and reconfigure it. If the problem continues, go back to your vendor and replace it under warranty.

Good to know that. Share it here if there is any progress becase I am curious about how it is going... :o

Is it the powerline utility? If PA451 is disconnected, the problem disappears right away? Tried it on a different computer? Attach a screenshot of the message you mentioned.

Describe in details. If you can upgrade firmwares for them, do it first.

In the second topology, your main network's IP is 192.168.1.* but clients connected to WR941ND show 192.168.0.*. If DHCP has been disabled on WR941ND, how is it possible? Besides, it is normal that...