Playing with modems - without a phone line!

[@discatte]

I've been looking to do something like this, great setup and explanation :3

[@steeviebops]

I wouldn't be surprised if that PCI modem with no speaker actually plays the modem audio via the sound card. A lot of the later ones do.

[@bzert281]

one interesting application would be a very long cable run. Google says, a POTS line has a length limit of 18K feet (about 5km) using 24 gauge cable, between devices. No doubt that 9V battery won't have the oomph to push current that far, but it's maybe worth while to see just how far you can push a signal, maybe just take a 1000-ft spool of telephone cord and bench-test it through that. Since Ethernet maxes out at about 300 feet, that could be a very cool retro application, to have a simple remote node 2000ft or 3000ft or a mile away, without using fiber.

[@woodss82]

Very good experiment there I haven’t done that in 20 years.

[@GeckonCZ]

That NEC modem definitely isn't a micro channel adapter. The card is too tall and unlike micro channel it has the standard PC-compatible slot cover. The edge connector also seems to be too far away from the rear edge and is keyed differently. I've no clue what kind of bus or interface it actually is though. Probably something proprietary...

[@tomhekker]

Really late, but maybe it’s for their Japanese PC98 bus?

[@yahnsolo]

I had somewhere an old short ISA modem, with also a small speaker and Rockwell PLCC ic! Very rare indeed

[@themaritimegirl]

They aren't rare at all; they're extremely common.

[@yahnsolo]

@@themaritimegirl oh well, maybe in your area! In Europe at that time, just seen a couple of those . The one i got was already old^^

[@andywolan]

9V battery, a resister, and some spare telephone wire. I wish I knew it was that simple years ago.

[@jessihawkins9116]

you could’ve read a book 😒

[@themaritimegirl]

Don't be rude.

[@jessihawkins9116]

@@themaritimegirl hey I’m just saying that’s how we learned how to do things back then. If he didn’t want to learn that’s on him.

[@andywolan]

​@@jessihawkins9116 Good for you. Want a lollipop?

[@jessihawkins9116]

@@andywolan for what? learning how to read? your generation is crap 😂

[@trevorwarren452]

I actually got the new ignite system with Rogers which includes a free landline

[@emilebarco9132]

Thanks for this superb demo. One question can you easily tell how many of the donated modems are Host Signal Processing ? They will need to go n the bin without the right driver , usually a 700k file. Also another thing you can do if modern supports Bell 202 is simulate caller id for a landline. Regards.

[@trevorwarren452]

That was cool I like playing with dial-up stuff as well just trying to find a free dial-up provider besides the free community dailup

[@eigenvector7035]

Nice to see someone with a similar hobby to mine. I dig that compaq!

[@ricardoasueiras]

This is great and thanks for putting this together. Do you have the electrical design of that breadboard shared anywhere in case I might want to reproduce this?

[@orlin369]

Great video!

[@seanjuth]

Is there a way that you could use a computer modem to simulate a telephone line?

[@Ojisan642]

High speed modems don’t work well on all digital phone lines. The v.90 standards and such are designed for analog twisted pair and circuit switched phones networks, not packet switched networks. So depending on how the phone lines are set up at your end, at the BBS end, and the carrier paths in between, you might be hitting some network segments that can’t carry the modem’s sounds properly for highly compressed analog data. I remember being in IT during the late 90s and early 2000s when modems were still in use but the phone systems were converting over to digital packet switching, from analog circuit switching, and seeing these kinds of problems popping up.

[@themaritimegirl]

See, that's what I've heard before, but I've also heard that V.90 and V.92 were specifically designed to handle packet-switched lines. There seems to be a disagreement there.

[@turbinegraphics16]

This will be useful for my old amstrad.

[@anuragsrivastava1457]

i purchase us robotics courier modem from ebay.but i am unable to connect bbses

[@K.F-R]

Very helpful - thanks. :)

[@abdullakc]

Still can use bluetooth as dial up.. from an mobile phone

[@audiodood]

Nice computer too

[@audiodood]

I gotta try this

[@vpfaustino]

Thanks for the video, but I coud connect my 2 Usrobotics, just using atx command in the ATD machine.

[@bestcity0979]

How do you connect to dial up if you have att?

[@themaritimegirl]

If you have a landline, then you need to sign up with a dial-up ISP. You can dial into BBSs without having to have an ISP, though.

[@ObiWanBillKenobi]

Thanks very much for this video! I had no idea a simple circuit with a 9-volt battery would "enable" a modem like that. You probably want to know about this video about ATA devices, which are inexpensive, plentiful, and easy to use. The real modems making their real sounds, and you can either call from one computer to another directly, or route it to an external IP address (another ATA unit connected to another computer) over the Internet. "Cathode Ray Dude: Dialing Up At Home." kzbin.info/www/bejne/e3ipenh8a9icf6c

[@sebastian19745]

than 2m cable length.

[@ellatlantida]

Try to use 2 vhf/uhf dual link to transfer the data only needs to make adapter from rj11 to audio Jack mic/speaker for baofeng (20-50$ ham radio) free very long range airnet 0-50km out side with optical contact and 1-3 km in town buildings! Other of my ideas is to transfer data in to laser beam (laser can be transferring sound) and receive them with laser beam diode for receive. You can find something like that for garages door safety or from some door alarm systems.