Proprietary in the fire alarm industry is known as “Only me the certified xyz manufacturer can service the system.This is a very confusing topic and subject to hours of discussion. However, many fire alarm vendors want you to believe that they are the only solution in town. Fortunately this is not the case. Any vendor can work on any system as long as they are certified with the district, city or state in which they do business. Even though there could be limitations to perform certain tasks, if the fire alarm company is a well reputable provider then they will likely be able to provide you with a ONE STOP SOLUTION.