Specific EE and BT routers work with DV, third party routers don't.
Ok. BT SH2 does work with DV. BT SH3 does not work with DV (as found out)
Do you know what EE high end routers work with DV?
The domestic SH3 does work with DV, I have one. The business SH3, which is an entirely different device, does not.
Ask on the EE forum about EE routers.
I've posted the question for you, here:
https://community.ee.co.uk/t5/Broadband-Landline/EE-hubs-and-BT-Digital-Voice/m-p/1619849#M138120
(I currently go by Denzel99 on that forum...SSSH...keep that to yourself).
Edit:...ah, ah...beat me to it.
Bril thanks yes you got my ask. I've also posted this
https://community.ee.co.uk/t5/Broadband-Landline/Requirements-for-EE-router/m-p/1619848#M138119
The BT Smart Hub 3 (residential, NOT BUSINESS) does with with DV but I may aswell go for a EE Wifi 7 router that does support Digital Voice as I can't find a BT Smart Hub that supports wifi 7.