What is the test for obtaining a warrant to wiretap a telephone line that is not protected by the Fourth Amendment?

The fourth amendment requires that the government show that it has probable cause to believe that a specific crime has been or is being committed before it may invade constitutionally protected areas. United States v. Licavoli, 604 F.2d 613, 620 (9th Cir.1979), cert. denied, 446 U.S. 935, 100 S.Ct. 2151, 64 L.Ed.2d 787 (1980). The fourth amendment's particularity requirement is satisfied if a wiretap order identifies (1) the telephone line to be tapped and (2) the particular conversations to be seized. Id.