and the strobes are disabled for some reason in old wtc 7
In 2001 wheelock was making the e70-lsm-24. The building was completed in 1970s, Wheelock e50/60 were made after 2001, so the use of the e50/e60 are unlikely. They may have been referring to the modern WTC 7.
Yeah, pretty sure they are: as of now nobody supposedly knows what notification appliances the original 7 WTC had.
@Wei_Huan might. I’ve heard him say he knows that it was a desk-mounted 8500 at the WTC7. As far as I know, seeing what he posted, I believe the pulls were “FIRECOM 8000” labelled rebranded Mirtone stations and (possibly rebranded) Federal Signal DirecTone speakers.
Yeah: he sure is one smart cookie when it comes to both WTC & Firecom systems from what I’ve seen!
Yeah, so have I. That would also fit with the desks clearly visible in that one interior video of 7 WTC (as well as a beeping sound heard in that same video, which might be the panel).
Given the fact that they’re labeled “8000” instead of “8500” & I think by something Huan once said as well, I don’t think that’s what they were. The speakers very well could have been DirecTones though (though that still leaves it open as to whether the system had any sort of visual signals).
I thought it was like pre paging tone with the standby tone
I’m just going by what I’ve seen other people say, & in the absence of seemingly any other evidence that’s what the chime tone is for, which is to indicate that the fire department has been notified.
I always thought the high lo tone in the background was a firefighters radio encoder/central station receiver
I believe it’s actually just a single-pitch tone, & its pulse rate is consistent with the pulse rate of many FACPs’ piezo sounders, implying that it might be the 8500’s.
One thing that has came to my mind too lately. Is that the firecom 8500 had 2 different tone generators, one that generated the lower pitched whoop and the other that generated a higher pitched whoop, and then the other that generated the Chime and the other that generated the second chime. And another thing that came to my mind was. That the system used Mainframes, just like the old pyrotronics systems.
1 Like
According to this guy the Firecom 8500 uses the TG-4B 4-tone tone generator by Bogen: said tones are “whoop”, “chime”, “steady”, & “pulsed” (only the first two were apparently/supposedly used by 7 WTC’s 8500 however, & said tones are also the whole tone rather than there being a separate generator for each portion).
By “mainframes” do you mean that you think it’s a modular panel? Could be (possibly likely given the one photo (& video) that’s known to exist of an 8500, & Firecom’s current LSN-2000 which is modular (which makes sense for a panel meant for any size of building, or at least skyscrapers)
I guess there could still be two tone generators that both are wired up to play the different tones. We don’t really have a way to prove that. They could even be doing what I know some panels from the same era do, which is keeping the tone generator always running and just using a relay on the output of it. I think Simplex did this with the whoop tone generator on the 2001 and 2120.
Well going by the fact that each tone generator is named the same as the tone it makes, that would mean that there are exactly 4, one for each tone.
1 Like
Mainframes as in the old security central monitoring ones as used by wells fargo/adt/pyrotronics
Never heard of what you’re talking about, sorry.
Central processing units
The CPU is only one part of a fire alarm control panel though (& also going back to what you initially said a lot of panels use CPUs, so saying that a panel has one doesn’t really say anything).
No. Edwards/EST is owned by Carrier and (I think) its owned by United Technologies which is also the company that owns Kidde. My info on United Technologies could be false but I know it’s true that they’re owned by Carrier. Firecom and Edwards/EST are completely separate entities
United Technologies Corporation split into Carrier Global Corporation & Raytheon Technologies Corporation (now “RTX Corporation” as of July 2023) in 2020, & Carrier Global is now looking to sell their fire & security division, which includes Edwards (they stopped using the EST name after 2016 except on their fire alarm control panels), to someone else (if they haven’t already).
What are you talking about?