this post was submitted on 18 Sep 2024
416 points (91.1% liked)

World News

39004 readers
2569 users here now

A community for discussing events around the World

Rules:

Similarly, if you see posts along these lines, do not engage. Report them, block them, and live a happier life than they do. We see too many slapfights that boil down to "Mom! He's bugging me!" and "I'm not touching you!" Going forward, slapfights will result in removed comments and temp bans to cool off.

We ask that the users report any comment or post that violate the rules, to use critical thinking when reading, posting or commenting. Users that post off-topic spam, advocate violence, have multiple comments or posts removed, weaponize reports or violate the code of conduct will be banned.

All posts and comments will be reviewed on a case-by-case basis. This means that some content that violates the rules may be allowed, while other content that does not violate the rules may be removed. The moderators retain the right to remove any content and ban users.


Lemmy World Partners

News !news@lemmy.world

Politics !politics@lemmy.world

World Politics !globalpolitics@lemmy.world


Recommendations

For Firefox users, there is media bias / propaganda / fact check plugin.

https://addons.mozilla.org/en-US/firefox/addon/media-bias-fact-check/

founded 1 year ago
MODERATORS
 

10-year-old Fatima Jaafar Abdullah was killed in pager explosions in Lebanon.

Israel murders another kid again.

you are viewing a single comment's thread
view the rest of the comments
[–] bloodfart@lemmy.ml 2 points 1 month ago (1 children)

you really might not.

before there were mobile phones there was analog dtmf wired telephones. they replaced pulse dialing and allowed for all kinds of additional signalling and triggering. ring a bell, operate a relay, kick people off so you could call the president, entire automated analog switching centers, you name it.

when mobile networks came on the scene there were all sorts of additional triggers but because the (second gen? the ones that could do sms) signals were actually digital, there was a much wider array of possibilities. dtmf had a handful of frequencies it supported and if you wanted to do something more you had to basically make sure the entire network you were using could send, transport and receive those frequencies.

now imagine instead of sixteen combinations of frequencies played at the same time you have access to thousands of possible triggers. once you have simple stuff like the basic receiving of text and lighting a led or playing one of several legally distinct jingles covered, you could do do much more. and people did. there were all kinds of things pagers could do through combinations of local interface and digital communication with a cell tower, all mediated through a handful of baseband chips on the pager pcb that could have the pins for stuff they wouldn't be used for disconnected.

but how would you make a pager set off an explosive?

well, the same way you use a casio f91w wristwatch to. you use its built in functionality (the speaker when the alarm goes off) to trigger a battery that can deliver enough electricity into a resistor to heat it up enough to make your (primary) explosive detonate.

in the case of a pager, those baseband chips have all kinds of on and off switching built in. it's not hard to imagine that basic, out of the box functionality would include pulling a pin high when it gets "*97" or some such. now tie that pin to the base of a transistor across the positive and negative terminals of the battery and sitting against a little petn and you got yourself a remotely triggered explosive.

you wouldn't even need a pcb.

there's probably a lot of stuff thats incorrect in this reply. it's late and this is off the dome.