Mick, is there a modem working with it? When you connect to the modem directly, can you access internet? If you do, connect it to WAN port of C7 and configure Dynamic IP on C7. If there is no modem,...

Yup, channel in WDS one should be the same as the main one.

TP-LINK has beta firmware regarding a similar issue... Submit a ticket and ask for it. Maybe it helps. http://ticket.tp-link.com/index.php?/Tickets/Submit

Are you using PoE injector or power adapter to power it on? Probably it is faulty?

(2) should work as a router to share internet. If you don't need its Wi-Fi, you can disable its Wi-Fi. http://www.tp-link.com/en/article/?faqid=608 (3) can be configured as an access point with DHCP...

Hi Mick, are you trying to use C7 to replace plusnet router or work with it? Do you have a username and password from your ISP?