
i have a 80/20 FTTC connection, the average throughput i get is 76Mbps/18Mbps, so i get home plug it in and get it on line with only one computer connected and run a speed test and get 52Mbps/18Mbps ok so i try another speed test the next day 51Mbps/17Mbps, ok so there is a wan port on the router so i reconnect the Openreach modem, reconfigure the router and run a speed test, 76/18 so there seems to be a speed differnc of 25Mbps between using the inbuilt VDSL modem and the Openreach modem, so off go's a email to asus tech support.....asking about the speed difference when using the inbuilt modem and the openreach modem connected to the Wan port.
And this was there response........
"
Dear [Removed]
My name is {Removed} and it's my pleasure to help you with your problem
This is common, if you DSL-N66U, it will do the routing forwarding, and this will reduce litter speed.
Or you can consider to disable both Windows firewall and the Asus router firewall.
Welcome to refer Troubleshooting & FAQ for ASUS products in ASUS website:
[Web address removed]
If you continue to experience issues in the future, please do not hesitate to contact us.
Best Regards,
{removed}
ASUS Product Support Team
"
So back in the box and off to the supplier it ASUS make a point of how fast this router is, this did not seem to apply to the modem. if you are looking to but a one box sloution and have a 80/20 connection this is not the router to go for.