Using an acoustically coupled modem over a cell phone
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- Опубликовано: 8 сен 2024
- I was able to get an old-school dial-up modem to work over a cell phone! Using my TRS-80 Model 102 and the acoustic coupler connected through a novelty handset I was able to call Level 29 and log in!
BBS: bbs.fozztexx.com
Excellent. I always wondered if this would work.
Yeah we did some serious hacking back in the day with these little model 100's! They were super handy. Batteries lasted forever so there was a LOT you could do with them. I had a 1200 baud external (battery powered) pocket modem stuck to the bottom. I had a 3.5". battery powered disk drive... but that was more trouble to use than it was worth.
i find very fascinating how you can make a connection from something so common and simple
Awesome. I've just ordered one of those novelty handsets and will give it a shot with my old Livermore modem-in-a-box!
very cool indeed. Would love to see someone try and use dialup internet over a cell phone.
DoctorNoob I've read this isn't really possible due to the massive amounts of audio compression applied to cell phone conversations. I think the reason this example is based on the slow 300 Baud transmission speed limited by the acoustic coupler.
It would probably work better with Google voice.
ok, using a novelty handset to interface to a coupler...pretty fucking clever. :)
I had thought of making my own little kit where I can receive and send faxes without a third party digital service and just send it through my cell phone via the dial-up method. I accidentally called a Fax number and then I had a thought, "why not just wire up some adapters and use my phone's dialing function to send faxes?" so, that's where I was also curious to see if I could also use dial up to connect to bbs systems and sure enough, you demonstrated just that. So, I can conclude that my theory of also using this "dial-up" method is also true to sending faxes (or also receiving faxes).
Thank you so much. : D and it's an awesome video by the way; 10/10 always recommend.
I appreciate that Tandy having a real keyboard.
Me too but i only hate the sound of it, i also don’t like that he wasted 38 f@ckin seconds of my live.
I would FREAKING LOVE TO DO THIS, just one issue, I don't own a TRS-80 (or any old BASIC computer of that style), an acoustic coupler, or a retro phone for my cell...
The handset shouldn't cost too much. In fact, it's nice to have one for when you need to make a call and do something else on your smartphone. No more speaker phone.
The other equipment is going to be more tricky... The acoustic coupler would probably be the easier piece to find, but it will most likely be an antique.
That's what ebay is for... Who cares about credit card interest when you can spend hours on BBSs?!
There was probably someone back in the day that would go around using pay phones to dial into BBS’s and played Doom on the go!
Now that's pretty awesome, now you can use it to get on the network with old computers.
I have a Model 100, I'm planning on trying this soon!
Soooo nice
Love it!
I see so many layers of things wrong with this - yet it works
Honestly, this is the first time that I see a device like that. I didn't know that you can connect to the internet calling to a number and putting the telephone horn in that thing.
Not connecting to the Internet, just a BBS
NOW WE KNOW YOUR PASSWORD, MUAHAHAHAHA!
Oh crap! Now I'm gonna get hacked! 😛
Bye... :(
Very impressed!!!!
awesome!
Hah! Coolness, I had one of those back in the day
I'm 99.999% sure this won't work, but I'm currently trying to get a USB modem to work with a cellphone. I would've given up by now, but I need results for the cashier at goodwill!
That won't work either, there's already a technology called "USB Tethering"
Using a telephone line? Like that would work, there's already a USB for it
You know, I wonder if we would be able to do this with modern computers should the more conventional ways of connecting be disrupted for whatever reason.
I've tried pretty much this exact setup with my Model 100 (cell phone plugged into handset, going into acoustic coupler) using the exact same communication parameters (M8N1D,10), but all I ever get is strings of random text & characters. Any clue as to what I'm doing wrong??
The reason is because that most of cellular calls are pretty much audio compressed, making it pretty hard to translate data into text
Well now I know, ha! Nice.
I need a acoustic coupler and one of those phone jack phones
You can order one in ebay, it's pretty cheap. But you would need a supported computer for your acoustic couplers
Now that’s f!ckin awesome ,so just when you think that acoustic couplers became totally useless,well think again because with modern technology and a interface adaptor, now you can send massages from you old computers trough the iphone to somebody else😁😁👍
can you connect it to a ham radio that broadcasts a signal to another ham radio thats paired to that modem?
I would love to do the same thing with an old fax machine, the ones that have a handset. I'm looking for a generic acoustic coupler to plug into the fax machine. Has anyone made that work similarly to this video?
I haven't tried it, but if the fax machine has an "overseas mode" setting, it should fall back all the way down to 300bps and be a lot more forgiving with echo, compression, and delay. BTW anyone into this type of thing should definitely check out the ITTY internet TTY project.
I'm looking for a way to do with without the bulk of the phone coupler. I have a palmtop pc with a modem in it. It would be cool to be able to connect something from the headphone jack of my cellphone to the phone jack of my palmtop
The circuit used in this video may help you.
ruclips.net/video/bF4lPw5p63E/видео.html
@@charliebrown1976 Can you hopefully provide a little more info on this? :D
@@noahbuzelli4245 I can't give you details (I'm not good with circuitry) but this circuit was used to take the signal from the phone line, removes ringing voltage, line voltage, and every other unnecessary signal, and converts the gain to something that can be used by standard audio devices. For the use OP is describing above, it may need some modification to the gain section of the circuit. Hope this helps!
@@charliebrown1976 not sure if that's legal
wow i like it. i wanna try soon, but with android and 2ndline free voip app with retro telephoneshell handset :)
Is your BBS dialable from Italy?
what brand of coupler is that
Is it possible to directly connect the cell phone headphone jack to the computer? A lot of the times those computers does not come with the acoustic coupler.
Yes, there's already a built in headphone jack connector to PCs
You'd need software or hardware on the computer to interpret the audio back into data, which is basically the role of a modem
Curious, which type of cellular network was the call originated over? VoLTE?
It was a cell call to a land line.
FozzTexx I mean, was the call over HSPA, LTE, etc
None of the enhanced digital technologies that are used when connecting from cell phone to cell phone apply because the other end of the connection was an analog POTS land line.
what was your connection speed? 300 Baud?
Also, what is the model of the acoustic coupler you used?
@@tieline1333 It looks like the Radio Shack accoustic coupler for the TRS-80 model 100. The 300 Baud modem is actually built into the TRS-80 model 100. This is just the interface to connect it to a telephone.
@@dbranconnier1977 Yes, and your could also connect directly although only Bell 103 was supported although it was apparently possible to modify the motherboard for CCITT V21.
Is it only a terminal, or can it save data?
デジタル(vocorder)な回線だと高速のプロトコルが通らないんだよね？
www.insentricity.com/a.cl/230/using-modems-without-phone-lines
Was your phone using HD Voice or VoLTE?
No, it was calling a land line, not another cell phone.
Is it possible with modems without a handset mount? Like these connected directly to phone line?
No, you would need a handset to avoid getting a scrambled data
And there's no way you can call a BBS directly to acoustic couplers with your cellphone
this is a cpm computer
Nope.
how many people tried logging in with his creds? lol
There is something inherently comical about using a modern, high-speed cellular device to dial into an old BBS using a novelty toy handset…
nice! #hackers
jajaja soy maestra de informatica y leyendo todo esto me siento taaaaaan inutil!!!
:D
IT WON'T WORK at all countries. GSM algorithms suppress FSK data. There are ways to solve this. But plain FSK as shown in the video, won't work at any country around the world.
Where did you get the acoustic coupler?