The Merge Corp. office building in California (where Charlotte Pickles works) has its current fire alarm system as the following:
It is powered by three Simplex 4100 panels and a Simplex 2001 panel (that uses AC voltage).
The parking garage has the following alarms, and there are LOTS of them there! They have Wheelock ET-1070-LSM-24 speaker/strobes, Simplex 4050 horns on 4050-80 light plates (without “FIRE” on the lens), Simplex 2901-9833 horns on 2903 light plates, Wheelock MT-24-LSM horn/strobes (some are set to Code-3 horn, some are set to Slow Whoop!), and Simplex 4090-1 6-inch bells mounted behind red grilles. The pull stations are a mix of Simplex 4251-30 break-glass T-bars and 2099-9756 dual-action T-bars. Smoke detectors are a mix of Chemtronics heat detectors and Simplex 2098-9201 photoelectric smokes.
The main building complex just has Simplex 4903-series speakers mounted on 4903-9501 retrofit plates that use 4904-9105 strobes. All the pulls are 4099-9001s. The smoke detectors are 4098-9792 TrueAlarms. There’s a 4603-9101 annunciator near the main entrance. The restrooms and small offices have 4904-9105 remote strobes.
The first 4100 panel controls all the alarms in the main building. It does three slow whoops, plays the standard Simplex voice evacuation message three times, then continues slow whoop until it is silenced.
The second and third 4100 panels are tied together, and so is the 2001. They power the alarms in the parking garage. The 2001 is hooked up to the 4251-30s and 4050/4050-80s and 4090s and Chemtronics heat detectors. It has the horn/lights sound on 90 BPM March Time. A special relay has the bells sound on Continuous. 4100 panel 2 operates the Wheelock speaker/strobes, making them do constant slow whoop. It also powers the 2903+9833s, and sets them on 120 BPM March Time. 4100 panel 3 operates the Wheelock MT-24-LSMs, and is set on Continuous so the horns can do their correct sounds without any trouble. It also plays the Simplex voice evac message once on the PA speaker system in the garage. All the other pulls and smokes in the garage are also hooked up to this panel.
The parking garage fire alarm system goes off separately from the main building’s alarm system. It goes off in a unique manner, too: Upon activation of the system, first the 4050/4050-80s activate in their 90 BPM March Time and the voice-evacuation message plays for 13 seconds, after that, they continue, but all the other alarms activate as well! It causes the whole garage to shake!
BTW: I based this alarm system off the Rugrats episode “Mommy’s Little Assets,” and made up an alternate version of the car alarm scene where Angelica accidentally triggers the fire alarm system instead of a car alarm. She walks backwards into a 2099-9756 pull station, causing it to open and the 4050s and voice-evac messages to begin. “Hey Mommy! Neat, a fire drill!” she says, but Charlotte is too busy talking on the phone and holding Tommy. She talks to Jonathan on the phone, and when the main alarms go off and the building shakes as lights and strobes flash, Angelica says “Cool!” and Tommy begins bawling. Charlotte shouts into the phone, “I can’t hear you! The fire alarm just went off! It’s a Zone 3 pull station on Level 2. Have it reset!” They go in the elevator to go up, and Charlotte reassures Tommy telling him “No more bells.” as the alarms fade. Tommy smiles, and the episode continues as normal.
I’ll try and make an audio simulation someday