The area of law-breakings for which can be disposed the interception and registration ofthe phone calls can be pretty wide. Therefore, in the case in which solid clues exist that one personwould have committed, as an Originator or Participant, law-breakings against the safety of theState, of high treason, or directed towards one land that jeopardize the international safety or thedefense capacity of the country, these measures can be authorized. The present piece of worksuggests a comparative analysis between national regulations and the international ones, in thematerial submitted to study, in the conditions in which we can notice, at the European Union level,a consolidation of the cooperation in the penal jurisdiction.