Modem tones over television or radio

I guess it is perfect legal as long as you stay in band. It is legal in Germany and we have (weiss Gott) a lot of regulations. The WDR Computer Club (a TV and radio hobby computer show of the WDR) this a lot of transmissions in the mid 80s. AFAIR they also transmited programms using the Teletext system - additional pages with binary information have been inserted to distribute software. But since programms started to grow beyond 1 to 10 KB, the transmission times became unacceptabe - AFAIR the bandwidth of teletext is less than two K-Byte per second and they only could use some pages, since 'ordinary' TV viewers still wanted their information pages transmited. On radio they cut of I think at 5 Minutes - so the maximum Programm was some 20 KB - all transmission was done IN BAND, while via TV up to 200 KB have been transmitted (in Austria at least). At one time the stereo chanals (used as dual monao) have also been used during the Show to transmit software - on A (left) the regular sound was transmitted, while on B (right) the software describen in the show was transmitted. AFAIR the BBC did also transmit software thru teletext pages (in GB). Even in the DDR (east Germany) radio was used to transmit home computer programms. I have several recordings from DTF99 computer shows - at this times the whole east German comuter hobbyist nation was recording the shows ... at least that is what they told me :) Gruss hans -- Ich denke, also bin ich, also gut HRK