Thanks for coming back to us EmilyFrost,
Unfortunately, you will not be able to use the master socket on the wall, as this will no longer be in use. With new installs we now use our hub as a landline.
We have just checked your account from our end to make sure this is all active and up and running. You will need to plug your landline in to the back of your hub for this to work as there is no alternative way around this.
For more information, please check the link here.
Kind regards Jodi.