Teleguide was a Swedish telephone information network,
like German Bildschirmtext or French Minitel. It was started by
Televerket (Swedish national telephone operator), with IBM and Esselte
co-operation as well as many other companies offering their services. It
was developed since late 1980s, phase 1 has ended in 1988 with an
experimental implementation of 100-terminal network in city of Vasteras.
The site has been finally opened in 1991, offering simple information
services, phone book, as well as messaging system first. Quickly, ticket
booking, banking and some order services (like taxis or reservation)
became available. Finally, it was even possible to put bets on horse
racing, look for parts for a car (or used cars), or order a food with
delivery in Stockholm. Around 10000 terminals and modem expansions for
computers were distributed. Contrary to Bildschirmtext, using Teleguide
was taxed per minute, not per page shown, in addition to monthly fee.
After about 6 months the project has been halted, because it was found
that for larger terminal number it will make too big losses for
Televerket, even after increasing the monthly cost 3 times. To be exact,
the loss started to increase with each terminal sold. In 1993 the
project has been shut down and all services have been closed, consuming
very high costs (according to some sources 2 billion SEK).
The devices used for Teleguide were units mostly built to order in companies which made Bildschirmtext units, so they are similar. Some modems used Siemens parts, while the terminals were based on Loewe's design of Bildschirmtext clients (see Loewe Multitel). The biggest difference is the addition of a chip card reader, used to authenticate user's account. The reader components were not soldered in Loewe Multitel, here they are present. This reader works using additional module with own microcontroller connected to mainboard, the chip card goes entirely into slot and is popped out by electromagnetic mechanism when ordered to remove.
|Manufacturer:||Loewe for Televerket|
|Memory:||64kB of RAM
|Display:||CRT, monochrome, white|
|Main port:||Telephone line|
|Additional ports:||Centronics port for printer
V.24 serial port
12V printer power connector
Peripherals in collection:
Disassembly is as in Loewe Multitel, but the display component is mounted on 2 additional bolts and 2 screws on the rear of chassis have to be removed. The difference is also with power cable - the unit has 2-wire cable without earthing pin, probably not required in Swedish devices which were packed in plastic cases.
Well, this network was so small that it's not easily
possible to find much in English :).
- https://sv.wikipedia.org/wiki/Teleguide - Swedish Wikipedia entry.
- http://terminals-wiki.org/wiki/index.php/Loewe_TeleGuide - Terminal photos.
- http://www.telo.se/telo/tomas-ohlin - Mr. Tomaz Ohlin's papers in Swedish and English - he was developing TeleGuide, if you research about TG, I recommend to view these papers. Below are the most interesting ones:
- http://www.telo.se/telo/sites/default/files/881123-Teleguide-Large_scale_videotex_in_Sweden_0.pdf - Brief Phase 1 report from 1988 in English
- http://www.telo.se/telo/sites/default/files/881214-Teleguide_88-Rapport_fran_verksamhet_under_1988_0.pdf - Full phase 1 report from 1988 in Swedish.
- http://www.telo.se/telo/sites/default/files/910201-Offentliga_tillampningar_i_TeleGuide_0.pdf - Public services in TeleGuide in 1991, Swedish.