Capacitor Network in the Handsets
This is where the fireman alarm installer or technician can get into some serious problems. Right between the two wires of the wiring of the building along with the earphone or microphone that is present within the headset, there is a need for a capacitor or a resistor. All of these telephones have this kind of network and its equivalent.
Based on the manufacturer of the system, the network might be right behind the wall-plate in the wall jack or within the handset itself. Usually, if you follow the instructions provided by the manufacturer the parts and components that are compatible with the system from the same manufacturer are used. As an installer, you don’t need to be too much concerned with this. Nevertheless, with those elevator cars, there can be an exception.
There is a good chance that the fireman’s phone jack that is present inside and an elevator car is not going to be a type approved by manufacturers. This wall station is going to be good looking jack that the fire alarm technician has wired into the system.
A request to the installers of the elevator for providing a single-gang hole for the purpose of installing fireman’s wall plate along with the phone jack will be ignored because elevators are expensive and the site owners don’t want to see these rugged-looking telephone jacks.
Our engineers understand this and they also understand the fact that this practice violated every code in the book. For this reason, they will be able to wire the jack with creativity that it doesn’t look odd and goes with the aesthetics as well. Tech support can also provide assistance in this regard.
For seeing how the wiring can be done within the elevator car, our engineers will take a close look at the wall’s wiring. This wiring is used for the rest of the fireman’s phone system as well.
- If there is a capacitor or resistor network present on the back of the wall jack for the entire system then copy that entire wring in the same fashion and this also includes capacitor and resistor values.
If there is no resistor or a capacitor network that s present behind the jack then our engineers will copy that wiring.