Mandatory infographic explaining all of the sounds:

http://www.windytan.com/2012/11/the-sound-of-dialup-pictured...

One of the comments on that says

> This sounds like US signaling. We had totally different in Europe and former USSR.

Other than the dialtone, and that in most of Europe a non-local call is started by dialling 0, is there any difference?

The double "bong" note used to probe the line properties before the high rate modulation starts was deliberately designed to sound good.

It's amazing that analog modems eventually reached 100% of the bandwidth of the digital network used for analog transmission, at least in one direction.

Once data is really moving, it sounds like noise, of course. If it didn't, there would be wasted bandwidth not carrying data. Analog radio and TV waste about 80% of the transmitted power on the carrier. When TV went digital, broadcast station power, and power bills, went way down.

https://www.youtube.com/watch?v=IF2v32xCD0Y Dial up sound slowed 700%

I still have an old 14.4 serial modem I just can't part with for nostalgic reasons (was my first payment received for computer related work at a BBS). Sadly haven't had a phone line in many years to ever plug it in to :)

Years ago, I managed to get two modems to establish a connection without an intervening telephone network by connecting a phone line between them. I turned off dial tone detection by issuing an ATH0 command to the answering modem. I then issued an ATA command. On the other modem, I issued an ATD command and the two modems negotiated a connection.

I was able to transfer files using the ZModem feature of the telnet program I was using at the time over that connection though it was significantly slower than just using a null modem cable.

Has anybody tried connecting dial-up services over a VoIP analog telephone adapter?

I'd imagine for the lower bitrates it might work

Aahhhh, some happy memories.

I downloaded Slackware over a 14.4 ...

In case anyone's curious, the DTMF digits in the 'Unrelated and Strange' ISP call are 99937501. I presume 9 for outside line, then 993-7501 for a local number.

Wonder what ISP that was?

Doing a bit of searching, looks like a Sydney, Australia number.

+61 2 99937501

Could not find an ISP listed with that number.

Found this page awhile ago and love it. v.22 is my favorite, as it's when I learned what a modem was, though I'm also fond of v.32 and v.34... I stopped using dialup before upgrading to v.90 (combination of using a 33.6 modem a bit longer than usual and then being a reasonably early adopter of a cable modem).

See a couple comments of people using one as a ringtone... that is an excellent idea and I may do that now.

The V90 have been my phone ringtone for a while now; when I get called the people around me gets a blast from the past and give me funny looks.

The only interesting sounds are the sync and line measuring tones. Actual data, I mean the QPSK or QAM modulation sounds like white noise to us.

v34-33600bps.mp3 is my new ringtone - thanks!

I've got a "56k.mp3" that's been my ringtone for years.

There's been a few times when I've been in a meeting, forgot to put my phone on silent, and received a phone call. Everyone immediately stops talking and looking around with "WTF!?" looks on their faces.

Oh man the Rockwell 2400baud smacked me right back to 1993. Thank you so much!

I can remember every bit of that v90 sound. Must have had it for 5+ years.

I remember v.92 pretty well as a kid and then 56k. Good times