Cognitive Radio Technologies and Software Defined Radios

This document responds to two petitions concerning the rules adopted in the Report and Order in this proceeding ("Cognitive Radio Report and Order"). The Commission granted a petition for clarification filed by Cisco Systems, Inc. ("Cisco") requesting that the Commission clarify the requirement to approve certain devices as software defined radios, and its policy on the confidentiality of software that controls security measures in software defined radios. The Commission also granted in part and denied in part a petition for reconsideration filed by Marcus Spectrum Solutions ("MSS") requesting that the Commission clarify the rules concerning the submission of radio software source code, clarify the rules concerning the certification of software defined amateur radio equipment, and initiate a further proceeding to adopt regulatory requirements for high-power, high-speed digital-to-analog (D/A) converters.