![]() Phreakers discovered the signal frequency at which the numbers are dialed and tried to match the frequency by blowing a whistle and fooling the electronic switching system to make calls for free. In the 1970s, a set of people known as phreakers exploited the weakness of digital switching telephone systems for fun. In the early days of telephone systems, telephone operators intentionally misdirected calls and eavesdropped on conversations. ![]() Telephone lines could be tapped and conversations could be heard. Telephone signals were sent via copper cables. The first events in the history of exploiting security date back to the days of telephony. This process is experimental and the keywords may be updated as the learning algorithm improves. ![]() These keywords were added by machine and not by the authors. #Cereal whistle phone for free#Among these phreakers, John Draper found that he could make long-distance calls for free by building an electronic box that could whistle different frequencies Keywords ![]() ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |