It is however important to ensure good security protocol, i.e. do not have a situation where the guarding personnel are the same as the engineer, and do not allow the key holder to have access to engineer codes or the ability to make any changes to the system via a master code.
By following this simple rule, we will ensure more profit for the industry upon a subscriber error, whilst ensuring that the industry will not be in the firing line should a loss occur.
J G Torrance, www.thealarmengineer.co.uk