Hi all. Sorry to resurrect this old thread but it seemed relevant from my Google search.
I have Now broadband currently set up using the Now router with WiFi turned off and my Apple Time Capsule as an access point. I also have a TP-Link TD-W9960. I was wondering if I could set up the TP-Link in modem mode and use the Time Capsule as the full wireless router? Is this likely to boost my speed a little?
It's very unlikely to make any noticeable difference. If there were, it would be to do with the VDSL modem chipsets in the Now box versus the TP-Link.
Having one box act as modem/router and one or more separate boxes as wifi access point(s) is a good way to configure your network, and I wouldn't mess with it.
Therefore if you were going to change, I'd suggest you configure the TP-Link TD-W9960 as router, so it's a straight swap-out for the Now broadband router.
However, the TD-W9960 is a very old box - it has only 100M LAN ports and 802.11n (= Wifi 4). I expect it would be sufficient for FTTC, but very unlikely to perform better than the more modern Now router.