. . "ling, routing, addressing, or signaling information through pen register or trap and trace devices or other devices or features capable of acquiring such information pursuant to law as defined in 18 U.S.C. ?? 3121 et seq. and 50 U.S.C. ?? 1841 et seq.; (d) acquisition of location-related information concerning a service subscriber or facility; (e) preservation of any of the above information pursu" . . . .