Data loo
The data loo (or CCC modem ) is a DIY acoustic coupler from the Chaos Computer Club . The building instructions were published in the Hackerbibel in 1985 and were distributed by more than 25,000 copies by mid-1988. The telephone modem , which you could build yourself using the instructions, was an inexpensive but illegal alternative to the few modems approved by the Deutsche Bundespost at the time .
history
The data loo (original name CCC modem ) was developed in mid-1984 in response to the very restrictive legislation in the field of telecommunications in Germany and offered an inexpensive option for remote data transmission at 300 DM (according to today's purchasing power 279 €) . At that time, modems were still banned in Germany; at first there were only rental devices from the Bundespost . At the beginning of 1987 the monthly fee for a BTX -MultiTel 1 was 48 DM (according to today's purchasing power 44 €) and for a MultiTel 2 78 DM (according to today's purchasing power 71 €). The first modem with FTZ approval in May 1988 cost 1950 DM as a table model ( around € 1,750 based on today's purchasing power ). The Bundespost modems corresponded to the international standards of the CCITT (today ITU-T ), but many hobby users demanded simpler standards, for example modems from the Hayes company .
The central component of the CCC modem is the AM7910 (FSK modem chip, supports Bell 103/113/108/202 and CCITT V.21 / V.23) from AMD , which is an asynchronous frequency shift keying modem with transmission rates on a single chip from 300 to 1200 baud and is fully compatible with the Bell and CCITT standards V.21 and V.23.
The data toilet got its name from the rubber sleeves provided for the acoustic coupler , which were rubber seals between the flushing water pipe and toilet bowl from the sanitary supply, as well as based on the artificial word "data hairdryer", a slang term for acoustic coupler based on the former popular S21 dataphone series from Woerltronic from Cadolzburg . The size has been chosen so that a loudspeaker with a diameter of 66 mm fits into the rubber seal and can be slipped over a telephone earpiece. According to the instructions, the latter is important for shielding against ambient noise.
The name was later reused for the network distribution centers built from mobile toilets at the Chaos Communication Camp .
Trivia
In the game Saints Row: The Third you can find the modern version of the data toilet in the form of several toilets on the northwest edge of the map.
Web links
- Description of the data toilet in Hackerbible 1
- Data toilet in the Heinz-Nixdorf-Museum
- Data toilet replica project and documentation
Individual evidence
- ↑ Schwarz-Schilling: Great, woolly . In: Der Spiegel . No. 38 , 1985 ( online ).
- ↑ Gail Schares: Cover Story: A German Hacker's Club that promotes creative chaos. (pdf; 1.1 MB) Businessweek , August 1, 1988, accessed on November 20, 2009 .
- ↑ Answer of the federal governments to the small inquiry of the Greens: Economic efficiency of the screen text service of the German Federal Post Office. (PDF; 369 kB) bundestag.de, March 3, 1987, accessed on November 20, 2009 .
- ↑ Post and non-approved modems: Bundespost allows the first 300/1200/2400 bit / s modem. toppoint.de, May 22, 1988, accessed December 26, 2016 .
- ↑ AM7910 datasheet. AMD , May 16, 1989, accessed November 18, 2009 .
- ↑ Peter Glaser : Unrestrained data urge: The Chaos Computer Club is turning 25 - with it a piece of German computer history . In: Berliner Zeitung , September 12, 2006
- ↑ Peter Glaser : "Datenklo" with rubber sleeves on futurezone.orf.at