Many panels can do 1&2 , 3 depends in who fits it and how well you maintain it, many don't bother with any maintenance and end up replacing the system again after a few years
For the dialler Connect the
+13v To +
- 0v to -
B to tr1 (b Aslong as it's the negative bell trigger)
This is simplest way
D BELL is the plus + hold off so don't get confused by that or AMP lol
It's the same if they bought your preferred panel and said fit it? They still won't pay your labour charge
Customers don't always understand were not paid to be labourers, your paying for the technical skill (from some) just like other sectors get paid £500 a day
Once word gets you d your doing £199 labour for alarms you will have to move to the coast (geezer)
Am i correct in saying sdi has essentially been killed off like ahd , so won't be available much in the future ?
Market leaders tvi and cvi
But straight ip onvif still have advantage of compatibility