Has anyone tried plugging in an ordinary / wired non-cordless DTMF phone into the side of the modem and can confirm if it works (e.g. with an RJ12 / modular plug to BT socket adapter)?
Or tried a non-DECT cordless phone and confirm it works?
Everyone I've spoken to at Orcon is adamant that it has to be a DECT cordless phone and nothing else.
Thanks