According to the very first post in this topic the WTC’s original system was an “American Multiplex”: as far as anyone knows Cerberus Pyrotronics did not become involved panel-wise until 1993 when the system was upgraded.
But it says the building contained a pyrotronics cr-7 system though we don’t know much about the cr-7 I remember finding out somewhere that the cr-7/xl-3 are the panels that the cpv-90 piggybacked off of
The system pre 1993 could have been a mix between the mxl and the cpv-90 with the mxl being the majority
Oh yeah, didn’t see that, sorry.
Its fine heheh we all forget things
I don’t know if this video is too well known. But it’s possible that wtc 7 used paging speakers for audible notification like in this Building.
1 Like
Execpt there was a chime
It’s semi-well known going by the comments on the video (the original may not have gotten much attention but now that it’s been reuploaded more people have likely seen it now that they’re aware of its existence to begin with).
Could have considering the original pre-1993 WTC 1 & 2 system used bullhorn-type speakers (at least if that’s what you mean by “paging speakers”).
Yeah, which according to what others have said is used to notify building occupants that the fire department has been notified: the reason it might not be sounding on the above system could be due to several reasons, including the feature being disabled (if it’s possible to do so on the 8500 at least), the system not being connected to the FD & thus having no reason to sound the chime, it not having notified the FD at that point in the video, etc.
1 Like
Yes that is what I meant by paging speakers
RE
1 Like
wtc 7 has a wheelock e50/e60
That looks like a yellowed E-50.
That’s the alarms in the new WTC 7 after September 11th 2001
What exit Signs are at the WTC?
In the photos information it’s dated September 9 2011
wait someone said old wtc 7 uses the e50/e60
and a atlas speaker too
and the strobes are disabled for some reason in old wtc 7