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Has anyone tried to decipher the signals used to trigger restaurant pagers?

Know those wireless pagers that restaurants hand out? I think they're called guest alert, host alert or serv alert. Something like that. There's got to be a way to trigger those whenever you want rather than when the restaurant wants, right? Has anyone considered using a PLC & Bluetooth to do this?

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mattcintosh3 months ago

I picked up a couple hundred of the LRS coaster pagers from a business went with a different system. They operate on 467.750 Mhz. There is a way to buzz all of them at the same time from the main unit (That could be fun having 50 people rush in at the same time). I'm not sure if the signal is encrypted, but that 3-4 digit id on them is what makes them go off, and that needs to be programmed into the transmitter.

They might be able to be triggered from multiple transmitters, and the older ones seem to be one way only.

ADRIANT283 months ago

And BTW I am sure they use low frequency not Bluetooth.

ADRIANT283 months ago

i am sure pagers are coded to one master transmitter only. This is to prevent interference from a nearby restaurant using the same system. It is like you can't mess up a public wifi network other than jamming it.

breeegz4 years ago
The pager I'm holding right now has a frequency on the back of 413.8624 MHz.. I need to get ahold of one more to try to determine if these are frequency divided or code divided. There appears to be a serial number on the back of 1108 and another number that appears to be a identity number that the clerks would use when setting it up (easily readable while in "the stack" of 180. Maybe I should go to a busy restaurant and forget that I was hungry...
Not sure how easy this will be because they may be coded and matched with the transmitting unit.

For starters you can hunt down the schematics, block diagrams, and other documents about the inner workings of such devices by using the FCC ID.

See my instructable here on how to do it here:

https://www.instructables.com/id/Find-schematics-wiring-diagrams-etc-for-everyda/

btw, please vote (and rate) my instructable if you find this useful!
ste54428 years ago
I have not considered this (and I dont think they use Bluetooth either) but it does sound like possibly one of the greatest pranks ever!
Let everyone know if you find out how these things work - I suspect they use some lower freq in the ISM band, maybe 433MHz (cheap and longish range)?

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