EX-23 3 0003.txt CONSENT OF ARTHUR ANDERSEN LLP Exhibit 23 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation by reference in this registration statement of our report dated October 5, 1999 included in American TeleSource International, Inc.'s amended Form 10-K for the year ended July 31, 1999 and to all references to our Firm included in this registration statement. /s/ ARTHUR ANDERSEN LLP Arthur Andersen LLP San Antonio, Texas August 24, 2000