Pretty simple question...

Has anyone managed to get telephony working on their Sky UK broadband service using a Deco X73-DSL?

I bought one to replace the "not very good" Sky SR203 router and the VDSL side of things works flawlessly.

I had hoped that the X73 model would also allow me to keep my home phone number working, but it doesn't.  It is plugged into voice port #1 on the X73 and I get a dialtone, but it won't dial out and I can't dial in.  There are a number of settings in the Deco app to configure telephony, but I have no idea what they are for Sky.

If anyone has got this working, I'd love to know what the settings are, else the X73 will have to go back.

Thanks!