VOIP Telephone extension out of router wifi range

[3gables]

I have a DECT phone  base unit connected to the Sky broadband router BT phone socket, but we live in an old house wirth thick stone walls so the range of the DECT base unit to additional units is limited.  We have a supplementary router elsewhere in the house hardwired through an ethernet cable to the Sky broadband router, and this provides a secondary wifi point and also wired access for computer, Sky TV etc.  Can I connect a second DECT base unit or a traditional non-DECT phone to that secondary router (wire or wifi), and if so how?  

[Mark39]

It won't work, I'm afraid. The ATA is part of the Hub, and the on.y connection to it is via the telephone port at the back of the Hub. 

The best you can do is run an extension socket from the Hub via a splitter/doubler.

[3gables]

Thanks; I tyried using an adaptor and that didn't work, so perhaps no surprise.  I donb't want to run another cable formn the hub (it's a long way and complicated in building terms.  Do you klnow if there's a way of using powerlines, ie connecting a powerline to the telephone socket on the hub, and taking a phone signal from a powerline elsewhere in the house?

[Mark39]

Not to my knowledge I'm afraid.