i-Telex is a hobby telex network via ordinary telephone lines or the Internet. Launched in 2000 by Philipp Hachtmann and Henning Treumann to awaken old teleprinters back to life. Philipp developed an adapter and a connection protocol, a teleprinter with TW39-Anschaltgerät (FSG) can be connected to a direct-equipped remote station via the telephone network with the appropriate over V.21 modems.
As far as possible a real telex connection is been simulated.This was about 10 years the Telex Phone version 1. However, as appropriate modems for the system were increasingly difficult to obtain and also some additional functions, such as Keyboard dialing were required, it was decided to develop a completely redesigned version 2 and to allow connections over the Internet.
Here came Fred Sonnenrein on board and there was a new version 2, developed based on ATMEL microcontrollers. Version 1 is no longer available, but still compatible with version. 2 The Telex Phone Version 2 allows the user to operate one or more teleprinters so that they can be connected with each other and with other users of the Telex Phone internally, via the public telephone network or the Internet.
As far as possible, under the real operation, the now unfortunately largely disconnected, telex network is simulated. You may access the Telex Phone by either a regular phone number or an i-Telex number, which you can choose. It should be noted that with a VoIP connection of the analog mode (modem connection) does not work smoothly, so here is the i-Telex (Internet connection) to choose.
i-Telex is modular structured, so it can be adapted to individual needs. If more than one device is connected, internal connections are possible dialing internal extension numbers (00 - 99). There is thus a kind of simulated Telex private branch exchange. It can be selected directly from the keyboard of the telegraph or with a number switch (dial).
For more information see: i-Telex