does every circuit work...
does the system work when the mains power is off, does the bell ring when the panel is completely powered down
do you have a 20min cut off timer in the external box or does it ring for 3hrs+ ?
You want set of controls for £150.00 ?
Less vat thats £125,
Materials would cost me £65+vat I'd expect an employee to cost 1/2 a day & transport
Can't afford to do it.
every change of tenancy requires an electrical inspection,
every cert will document the the no. of mains powered smoke detectors,
IIRC battery only complies with the some recent landlord regs but not with the building reg ?
Burglary hotspots are normally served by Yale or the local "value" alarm co.
I been knocked back on a few areas where I can't afford to live, one with keys for ragtop A5 left in the garden as they could get it started
I try to avoid speech diallers,
IIRC the last time I had the misfortune of touching a Texecom speech dailer it had all the menu's for texting but was the speech only product.
whoops...
1st I'd link loop at the pcb & check the new controls,
if the fault reappears when the loop is put back on the panel, I'd look 1st at the devices which contain isolators,
good luck
being northern & poor... a £400 intercom for people to wear out or vandalise ?
I'd use a normal intercom with a PSTN interface,
However I'd not expect a dental surgery to operate without a reception ?