1) Telephone crime 
Phreaking is a slang term coined to describe the activity of a culture of people who study, experiment with, or explore telecommunication systems, such as equipment and systems connected to public telephone networks. The term phreak is a portmanteau of the words phone and freak, and may also refer to the use of various audio frequencies to manipul...
(from the article `cybercrime`) ...unauthorized long-distance calls and setting up special `party lines` for fellow phreaks. With the proliferation of computer bulletin board ...
Slang term for telecommunications system cracking. See also INFOSEC and Van Eck phreaking.