I think you should go buy a g2-12 galaxy or a texecom perhaps buy kit perhaps from
Www.securitywarehouse.co.uk
Try and play with panel it's menus it's functionality for a good few weeks so your confident in what it can do
Only issue is doing that still won't teach you to fault find and deal with any special functions
Perhaps take in in house jobs which are basic quotes and as you go along you may get asked to do something special
Security warehouse do plenty of kits and cheaper than most places
G will confirm that I am sure!
You could in theory take the relay output to signal another input in the dialler but the dialler has to be able to recognise both inputs are activated to play you both messages that you record instead of just one
Not so diy but depends on your knowledge of circuit s etc
How often are silent pa requested for police response? Is it insurance related or something dependant on a risk assessment
Or are most pa on audible aswell as response
Could be camera then or Dvr , because analogue output does not confirm both outputs necessarily working
Or it could be Dvr , this is the issue you have limited amount of equipment to test with
Hopefully shop can identify problem , which shop? Maplins?