The BBC carried London Stock Exchange information service in Datacast packet 8/31 which was very live data so regional stock brokers could deal...
CEEFAX had another feed which was delayed by say 15 to 20 mins for informative purposes only,
However some one started selling Ceefax decoder cards and a dealing system ...
This use was in breach of the CEEFAX T&Cs and the BBC started legal action ..
However there were some complaints to CEEFAX that it would crash .... because we knew what and how we had transmitted it was fairly easy send information to crash the system every few minutes .....
as part of the normal transmission sequence
which sort of pre empted the legal action .. and the information provider was very very impressed as the BBC had put measures in place to stop the abuse .... within a few days of the BBC knowing about it.
That stopped the offending organisation and they never tried to work out what the BBC had done... and any one who then complained got a nice letter pointing out that it was not the BBC problem .. and that the transmission had been tested and they could confirm that they were transmitted teletext which conformed to the international standards and that what the viewer was doing was illegal and that the BBC was suing people .
Last edited by Technologist on 22 September 2019 7:08pm - 3 times in total
bilky asko and WW Update gave kudos