More dial-up modem calls over VoIP, including 56k
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- čas přidán 22. 06. 2024
- A longer video demonstrating several modem dial-up calls over VoIP, even a unexpected bonus working V.90/56k connection!
Prior to making this I wouldn't have thought even a V.90 handshake was possible, but it indeed worked a least for a little bit before it dropped. Calling out to a local ISP I got carrier speeds ranging from 50,666-53,333 bps.
Originally in the first video I was testing modems over VoIP so people could actually dial in to a retro bulletin board system (BBS) I was working on, but it got cut short.
00:00 - Intro and setup
02:00 - V.90/56k attempts
03:14 - V.90 success
05:45 - V.34 attempts
08:25 - ATA191 config
09:30 - V.34 finale
i had no idea dial up was still a viable or usable thing even after the 2010s really, thats pretty neat
Some people actually are still stuck with dial up internet, mostly in rural areas.
2020's even
It depends on where you are in the world. Some counties do not have consumer digital lines, only dial up. Other location you can't get a analog line, even if you ask for one.
In really small towns, this is the only option. They can use satellite internet, but it’s very expensive and is sensitive to weather.
Connecting to the internet via internet
"My actions are beyond your comprehension!"
You are correct retrain is doing again a seconds long handshake during which no data is exchanged. If you force your modem's audio to always keep on even when connected you can clearly hear this. I even used to recognize speedshifts just by hearing the audio :P. Speedshifts happen almost instanteniously. I used to avoid retrains by forcing just-a-little lower connect speed. Man these were great times. These days if you want to experience this retro-AT modem stuff, there's still something very similar on 4G/5G modems :=) Great stuff thank you.
This is what we used to do when I ran the ISP and people had disconnect issues with 56k, track down the command for their modem to force a slightly lower connect speed. Some were livid we were slowing them down, but hey do you want usable service or not?
@@bryanwann😅😊
Everything you're working on feels magical. It's important to preserve these types of services. Subscribed!
I have some of this hardware ready to go, going to hook up an Amiga 1200. I had one of my Amiga 1200's hooked up to a 56k dialup modem back in 1997/98. I was so chuffed back then! it was amazing to have that working back then. I am going to re-create that old setup.
Yeah I was doing the same many years ago, I think it was 1994/1995. I also remember that there was no or very few buffering on the Amiga's serial port so DTE speed needed to be set at 57600 instead of 115200 otherwise you would have overrun errors that would tank your performance. Cheers.
Faxes work well over VOIP so we should expect most modem connections to also work. The high end 56k speeds relied on using the old POTS lines for digital signals instead of analogue tones, so the speeds up to 33.6k speed may work well with VOIP.
Imagine your fbi agent listening in on you, then they just hear dial-up.
I get the point, but I'm still appreciating how ridiculous it is to try to connect to the Internet over an active Internet connection.
It's not necessarily about trying to connect to the internet, but able to connect to legacy things that still use dial-up like retro bulletin boards, industrial controls, or out-of-band management of network devices.
Yo dawg, we heard you like internets! So we put internet on your internet so you can surf while you surf!
I have machinations of modems outlasting humans if an extinction event occurs, jsut sending data over optic cables and getting powered leftover wires and plants.
I’m trying to get fax machines to work for an Amish community. VoIP is an absolute NIGHTMARE. Give me my direct lines back!!
Fax is dead... it's literally the direct embodiment of everything the Amish seek to avoid.
Wild this is showing up in my algo. However it's a very cool video and I'm surprised to see it still working
Those "new" Cisco ATA's seem pretty neat. I'm still rocking a Linksys PAP2T for my modems, seems to work fine. I've never managed anything past 48000bps, and that's rare, but I think that's just because the CPU in it is like 20+ years old. It'll do V.34 just fine though. Think I'll need to get one of those ATA boxes. Nice work!
BLERS is block errors
I have actually had pretty good luck with V34 over VoIP myself, it tends to hang on and be pretty stable for at least several minutes at a time. Long enough for my machine to connect, get the NIST time and an RSS feed before I disconnect.
Hi Bryan, I spent some time testing different chipsets for tolerance to jitter (yes, VOIP = jitter due to buffering and following IP, even choosing noncompressed codecs).
The results are pretty interesting: the best modem who tolerates jitter the best was Cisco NM-16AM V2 in my PSTN emulator - 2811 (w/ VIC3-4FXS and E1 uplink to the famous AS5300 full of MICAs), second - was INPRO IDC 5614 (the same Rockwell/Conexant chipset), then Sportsters and ZyXels. And. Drumroll. The couriers was the worst (I have 11 models external and three internal variants w/custom firmware). I will retest someday soon one more time this setup, now with Courier Lite (basically transformer-less sportster with only one small chip inside, TI 92MHz based) manufactured in mid 2010s with 2019 software (!) bought for $25 "for parts" in perfect working conditions month ago.
Oh that's interesting, thanks for that! I guess it's not surprising, AS5300/5800s were the workhorse of a lot of the last big dial shops. Back in the ISP days I ran TotalControls and they seemed pretty good. I only have the Couriers because I was resurrecting my BBS and wanted to see if it was feasible to actually take calls with it.
It's like a shark jumping another jumping shark, mid-jump!
internet over internet
hows the roundtrip latency
that usrobotics modem is awesome. if there is/was a better one produced I'd like to know what it is.
commenting for the yt algorithm
Thx for the share, nothing will be the same as it was then when you connected to the net. Today’s internet is dark and boring as f.
3:18 is what you came for! 😍
If V.90 / 56k works... why not fax stuff over VoIP? I'm not in IT but being able to interface with fax machines over VoIP w/o needing to use a third-party service would be useful for the places that still utilize fax and associated signaling, messaging, and protocol(s). Cheers!
Hard to say, fax should be much more tolerant of VoIP since it operates at a lower bit rate (I think 9.6k-14.4k). I suspect it's just the general trend to get rid of fax machines and mechanics completely. There's the T.38 fax relay protocol (which I know nothing about) that tries to basically send an image over IP and avoid analog altogether. Or, endpoints are doing the bare minimum to support voice call, using heavy compression, oversubscribed links that cause congestion, and it just butchers any sort of modem/fax call.
You belong to a German state administration, eh? 😂
@@LarsPW Nein. It's still common - especially for state offices to use this olden tech. World-wide, apparently! I mean, until a particular office gets a money infusion or a piece of legislation requires them to update things. If fax stuff over VoIP worked, I wouldn't mind so much but it's a rare occurrence to have to fax. To have the ability / option to do it is nice.
i fax over voip!
@@enthusiasticgeek7237 How? Can you elaborate on that?
Those sexy US Robotics modems… were there any other kinds? 😂
Dial-up...voice calls...using telephone lines? So it's a telephone call with extra steps and reduced audio quality
On 3:44 what was that low sound ding? Was that the "no carrier" ding? I've never heard it before
That's part of the V.90 handshake, the digital impairment learning (DIL) sequence. Different chipsets tend to have different sounds, US Robotics has the gong/bong sound, Rockwell chipsets tend to have an angry buzzing sound
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Why don't you actually log in and try it out?
69th sub, heh
Please figure out how to make FAX work reliably over VoIP.