5 views

2:02

Watch
- Search Videos
  
  Advanced search »
- Submit a New Video
Discuss
About
- Try clicking on the various channels to see videos posted to that channel - if you're into music you can click the Music channel to get more music sifts - go on and explore! Use the "hotness" when you have opened the channel link to get videos that have gotten a lot of votes, or use "newness" to have a look at the new sifts.
  When browsing sifts you like, have a look at the Related Posts list to see other related videos, click the tags under the video title to see more sifts tagged with the same tags or have a look at other sifts from the same user in the More Posts By list. If the sifted video is in a play list, have a look at the play list to see other interesting videos the Sift users have linked together.
  Enter the Sift Lounge to chat with online sifters about anything and everything, or read interesting posts in the Sift Talk forum.
  The Top New Videos list is always full of interesting, current videos. It is always recommended that you have a look through the Top New Videos, but also have a look at these:
  - Upcoming Unsifted Videos - active video submissions that neither are published to the front page nor archived to the submitter's personal queue
- Have you seen a really funny, surprising, scary, interesting, cute or in any other way extra good quality video?
  Post and share it here - VideoSift is the best video aggregator on the Web, where we share, discuss, promote, and interact with the best videos out there on the web. Post it here, and share it with the large community of video-interested users. And - you are guaranteed to find more very good videos here already!
  Mind you, we only share videos you discover that someone else has made; if you "self link," by posting a video you have made, have posted or have interests in, you risk the ban hammer - read the posting guidelines before posting. The sift is NOT for promoting your own videos - it is for sharing videos others have made.
  Submit a Video Now »
Login

Dial Up Modem Sounds, from 300 bps to 56K

submitted by ant

2 weeks 6 days ago

"The sound of dial-up at some of the most common speeds, including 300, 1200, 2400, 9600, 14,400, 33,600, and 56K. As noted in the video, the sound of a V.34 connection at either 28,800 and 33,600 will be the same, and both were common around the same time, so I've only included the 33,600 connection.

Note that this isn't intended to be an exhaustive list of all speeds, but a sample of the most common ones. There are many other speeds and protocols, including but not limited to 75, 110, 4800, 28,800, etc. Also note that this video includes a V.90 56K negotiation, which is the one that people are most likely to find familiar. With that said, if it doesn't sound quite right, remember that V.90 deprecated the X2 and Flex 56K standards, which sound quite different.

All but the 56K connection is made through a Teltone TLS-4 telephone line simulator, essentially a 'telephone network in a box'. 56K connections require that the server side be connected digitally, so a Teltone ILS-2000 is used instead, which does the same job but for ISDN (read: digital) phone devices. In this configuration the analog 56K modem is connected to the network via a DIVA T/A ISDN terminal.

Server Specs:

Cobalt Qube 2
MIPS RM5231-250Q CPU @ 250MHz
128MB EDO RAM
13GB Quantum Fireball IDE HDD
2x 10/100 Ethernet Ports
Custom RedHat Linux OS
Startech PCI2S550 2x Serial Port PCI Card

Laptop Specs:

Toshiba Tecra 500CDT
Intel Pentium @ 120MHz
144MB EDO RAM
1.2GB IDE HDD
12.1" 800x600 Active Matrix TFT LCD

Modems:

Lexicon LEX-11 300 baud acoustically coupled modem
USR Sportster 1200 Modem
USR Sportster 2400 Modem
USR Sportster 9600 Modem
USR Sportster 14,400 Fax Modem
USR Sportster 33.6 Fax Modem
USR Sportster 56K Fax Modem

0:00 Intro
0:04 300 bps Bell 103
0:19 1200 bps V.22
0:31 2400 bps V.22bis
0:46 9600 bps V.32
1:02 14,400 bps V.32bis
1:19 33,600 bps V.34
1:36 56 Kbps V.90".