I am becoming increasingly concerned for the good name of the firenet forum. Some postings are deteriorating to personal insults and this is unacceptable. I will take action to stop this if necessary but please, in the interest of free speech, dont give me cause.
David you must understand that people have a choice of whether to respond to your question or not. You do not have a right to demand answers to your questions, I have no doubt that you are passionate about what you believe to be true but others may disagree and simply wish to keep their counsel rather than enter a protracted and heated argument. Please respect their right to do so.
If you seek a full explanation of Colin's view of the design of fire alarm circuits you need look no further than his book "the design, installation, commisssioning and maintenance of fire detection and fire alarm systems" where there is a very full explanation with diagrams between pages 81 and 97.
ISBN 0 580 47626x.