Daryo Sep 16, 2015:

another possibility would be to look for assembly/user manuals for similar equipment - they ought to be few multinationals selling their wares in English speaking AND in French speaking countries together with all accompanying manuals ...

Olivier Den Hartigh (asker) Sep 15, 2015:

Hi Daryo, there are several examples of PDF manuals with that terminology. I don't have more information, just a table with some specs. With further research, "pulses" could be "tension pulsée" that is different according to the protocol used by the fire detector panel. Fire detector panels are connected on a loop and when a fire occurs, isolating circuits shut down the section of the loop If the loop voltage falls to a pre-set level. That is the basic principle of fire detector panels.

Daryo Sep 15, 2015:

Supply voltage to what? to which part of these "Fire detector panels"

"protocol" for the communication between what and what?

No one's got a crystal ball, you have the whole ST ...