PSC- US I. Clayton, 108 F.3d 1114 (9th Cir. 1987) (telephones are instrumentalities of interstate commerce; US I. Corum, 2003 U.S. Dist. LEXIS 9517 (D. Minn. 2003) ("it is axiomatic that telephones even when used intrastate are instrumentalities of interstate commerce"); Dupuy I Dupuy, 511 F.2d 641 (5th Cir 1