I vaguely remember speaking with you before about yhis or something very similar?
Your alarm voice dialer will be analogue and worked of your old PTSN line. By the sounds of it for £200 your alarm company is trying to sell you a new voice dialer but, there is no need!
Thereare couple of ways of going about this and its based around Voice re-Injection (VRI), if you want to look it up!
You can modify a BT NDE5C master socket or buy a VSI facplate however, you need to disconnect the incomming wiring from the stree from the socket, as it’ll likely still have 50v on it.
or you can buy something like this.
https://www.run-it-direct.co.uk/adsl-vdsl-faceplates/voip-voice-injection-kit/
