North Carolina General Statutes Chapter 15A. Criminal Procedure Act § 15A-260. Definitions

(1) “Electronic communication,” “electronic communication service,” and “wire communication” shall have the meaning as set forth in Section 2510 of Title 18 of the United States Code;

(2) “Pen register” means a device which records or decodes electronic or other impulses which identify numbers dialed or otherwise transmitted on the telephone line to which such device is attached, but the term does not include any device used by a provider or customer of a wire or electronic service for billing, or recording as an incident to billing, for communication services provided by the provider or any device used by a provider or customer of a wire communication service for cost accounting or other like purposes in the ordinary course of its business, nor shall the term include any device which allows the listening or recording of communications transmitted on the telephone line to which the device is attached.

(3) “Trap and trace device” means a device which captures the incoming electronic or other impulses which identify the originating number of an instrument or device from which a wire or electronic communication was transmitted.