How is it untruth ? With adt panels you can only use adt products .
The installer tried exactly the same pir sensors but not branded adt and they would not work with the adt sytem .
Not sure if you were able to resolve this problem but I was in the exact same situation and now have working alarm.
I called a company called genie cloud cctv as they claimed they could fix the issue which was also gsm fault.
Their engineer firstly tried to use visonic installer code which he...