this post was submitted on 12 Feb 2024
867 points (98.5% liked)
linuxmemes
21281 readers
560 users here now
Hint: :q!
Sister communities:
Community rules (click to expand)
1. Follow the site-wide rules
- Instance-wide TOS: https://legal.lemmy.world/tos/
- Lemmy code of conduct: https://join-lemmy.org/docs/code_of_conduct.html
2. Be civil
- Understand the difference between a joke and an insult.
- Do not harrass or attack members of the community for any reason.
- Leave remarks of "peasantry" to the PCMR community. If you dislike an OS/service/application, attack the thing you dislike, not the individuals who use it. Some people may not have a choice.
- Bigotry will not be tolerated.
- These rules are somewhat loosened when the subject is a public figure. Still, do not attack their person or incite harrassment.
3. Post Linux-related content
- Including Unix and BSD.
- Non-Linux content is acceptable as long as it makes a reference to Linux. For example, the poorly made mockery of
sudo
in Windows.
- No porn. Even if you watch it on a Linux machine.
4. No recent reposts
- Everybody uses Arch btw, can't quit Vim, and wants to interject for a moment. You can stop now.
Please report posts and comments that break these rules!
Important: never execute code or follow advice that you don't understand or can't verify, especially here. The word of the day is credibility. This is a meme community -- even the most helpful comments might just be shitposts that can damage your system. Be aware, be smart, don't fork-bomb your computer.
founded 1 year ago
MODERATORS
My 10 year old niece asked me what my RJ45 wall socket was while I was fixing her mom's computer.
"It's for old telephones"
She then asked me if I had an adapter for it so she could charge her phone.
I almost died.
Rj11/12 are for telephones, rj45 is for ethernet
Oops, yes. Thats what I meant. STILL died.
VoIP phone
Some mad lads actually did this:
Won't work anymore. Our phone line is completely replaced with fiber. On the other hand i can't remember any unwarned outages in the last 20 years.
Technically, if it's a land line port and still connected to an exchange that hasn't gone completely VoIP (that's a thing where I am), it might actually be possible to build a charger module that plugs into that port.
Would it be worth it, though? ... No.
Low power is supplied over old land-lines for the purposes of making telephones ring and powering other handset bits and pieces, within reason of course. Using it for anything else is undoubtedly illegal as phone lines aren't rated for huge power draws.
(If you're interested, there are videos online where people have hooked up LED lamps etc.)
But, let's say that module existed and was legal. Your niece still wouldn't be happy with it.
To avoid burning out to the telephone line, any such device would have to be a r e a l l y s l o w trickle charge.
I wouldn't even think about it for emergency power outages. A battery backup is a better option.
There's even an instructables on how to do it.
Would it make you feel better that literally today I had to troubleshoot a RS-232 at work?
RS232 is functionally immortal. Its market share in the niches it fills has never -- and I'd argue will never -- go away, or even shrink all that much. It's like those lobsters that don't age at all but if we splice the genes that do that into humans it gives us cancer.
Comparing RS232 to cancer is a good analogy.
I hate it but as you said it has its niche and there really aren't better options for what it does. If someone else has a means to wire up +100 sensors to one system that doesn't involve enough wiring to encircle an entire city or an unbelievable reliable means to do M2M between two machines that's secure simply because everyone who knows how to tap it has a high paying job I am all ears.
Could work in theory. Back then there it had sonething like 40 volts going through the line and you needed some decent power to make the bell in the phone ring.
But I don't know if that's still in use these days.
Those old POTS phone lines did carry a few volts.