(a) The commission may investigate as necessary to determine the effect and scope of competition in the telecommunications industry. The investigation may include:
(1) identifying dominant carriers in the local telecommunications and intraLATA interexchange telecommunications industry; and
(2) defining the telecommunications market or markets.
(b) In conducting an investigation under this section, the commission may:
(1) hold a hearing;
(2) issue a subpoena to compel the attendance of a witness or the production of a document; and
(3) make findings of fact and decisions to administer this title or a rule, order, or other action of the commission.