The Starplex forum

Right then, if you want to use your own device on BT Infinity rather than the BT supplied modem etc. Here is some information if you want to use a Draytek 2850n VDSL device on a PlusNet connection

Log onto the Draytek and go to WAN > General Setup

• Change the DSL mode to "VDSL only" - This will make router reboots quicker and eliminate the need to use the draytek supplied VDSL/ADSL filter (do not confuse this with a standard micro filter)
• Further down the same page, enable VLAN tag insertion for VDSL and input "101" as the tag value
• Click the "OK" button at the bottom

You may need to reboot the router at this point, if so just, log back in to the router

• Go to WAN > Internet access and on the right hand side click the "Details page" button
• Input the required user name and password as supplied by the Infinity provider
• Change the protocol type to "PPPoE"
• Click the "OK" button at the bottom

You will almost certainly have to reboot the router again.

I also changed settings in VDSL > VDSL Setup
Having checked the VDSL information in Online status > Physical connection I then altered the VDSL2 profile to only use 17a
This appears to allow the router to get a "showtime" connection quicker to the provider than by leaving all profiles enabled.

If there is a server on site and it is configured a DNS server, I would also strongly recommend changing the DNS forwarders to those which the router picks up and can be viewed via Online status > Physical connection.