This strange beast in the modem realm is actually an interface to a proprietary
German service. On the back is a round DIN to connect to a proprietary interface
to the users phone line. Two others connect to one or two external monitors. A
second monitor was apparantly required by this expensive, unpopular service. The
unit was manufactured by Siemens in cooperation with Commodore, and then marketed
by Commodore. The "Loewe" version, in contrast, required a special terminal
screen made by them, while using the C64 as a keyboard.
The Amiga version of the decoder is little more than a cable that plugs
into the Amiga parallel port, and has the same round DIN on the other end.
All of the modem-work is done in software. This decoder, then, is even
less of a "modem" than the Commodore 8-bit version, but is still included
here for completeness.
Model : BTX Connection : BTX Proprietary line Interface : C64/C128 Expansion port Speed : ? Notes : "Bildschirmtext" service only
Model : BTX-II Connection : BTX Proprietary line Interface : C64/C128 Expansion port Speed : ? Notes : "Bildschirmtext" service only
Model : BTX-Steckmodul Fur Loewe Connection : BTX Proprietary line Interface : C64/C128 Expansion port Speed : ? Notes : "Bildschirmtext" service only
Model : Amiga BTX cable Connection : BTX Proprietary line Interface : Amiga Parallel Port Speed : ? Notes : "Bildschirmtext" service only
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