One lesser-known company that’s kind of local to my area is Protectowire, the makers of https://www.protectowire.com/documents/ds-6953.pdf the BG-50 pull station. They’re based in Pembroke, MA, and the only Protectowire fire alarm system I’ve seen in the field so far was the Knights of Columbus building in Pembroke; they have a Protectowire SRP4x4 fire alarm panel that also has a Notifier FireVoice-25/50 voice-evac panel and a Silent Knight power supply panel tied into it. The alarm signals are the older bulky-looking SpectrAlert speaker/strobes, and there are also Hochiki smoke detectors and Sigcom T-bar pulls rebranded by Protectowire. I was only at this place a couple of times for Halloween parties, and I’ve never even heard of Protectowire until I first saw that system in 2010.