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CrazyCalvinWilliams
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Is this part of an alarm system or something?

Sun Sep 11, 2016 2:07 pm

There are these random USB ports on the wall in my school. They all seem to be placed by a door or emergency exit and nothing is plugged into any of them. I plugged my USB power bank into one of them and it started charging, so these ports are connected to something somewhere. I originally posted this on Reddit a few weeks ago but nobody could give a clear explanation. Maybe some of the alarm-geeks here could figure this one out? :P

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freebrickproductions
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Re: Is this part of an alarm system or something?

Tue Sep 13, 2016 8:07 pm

Maybe it's just a USB power supply?
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CrazyCalvinWilliams
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Re: Is this part of an alarm system or something?

Wed Sep 14, 2016 7:54 pm

freebrickproductions wrote:Maybe it's just a USB power supply?
But why would there be one in all the exit doors?

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Chem_Boffin_6589
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Re: Is this part of an alarm system or something?

Wed Sep 14, 2016 8:29 pm

Probably to send open/close commands to the computer module that closes and opens the doors (as this is and access control unit). My school uses maglocks and relay nodes connected to the monster 80 zone fire panel.
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JMAN
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Re: Is this part of an alarm system or something?

Thu Sep 15, 2016 10:18 pm

I would have maybe thought they would be for a schoolwide monitor or tv system, does such a thing exist?
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CrazyCalvinWilliams
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Re: Is this part of an alarm system or something?

Fri Sep 16, 2016 12:48 am

I do know all these doors are wired up to a button panel in the secretary's office and she can remotely unlock the doors to "buzz" people in and out of the building but there's no remote opener type thing.

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Re: Is this part of an alarm system or something?

Fri Sep 16, 2016 5:10 pm

JMAN12343610 wrote:I would have maybe thought they would be for a schoolwide monitor or tv system, does such a thing exist?
There is, but you'd have to use HDMI or VGA for the video.
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