[KPMG LETTERHEAD] EXHIBIT 23.12 CONSENT OF INDEPENDENT AUDITORS The Board of Directors Infoacces, S.A. de C.V. and Subsidiary: We consent to the use of our report included herein and to the reference to our firm under the heading "Experts" in the prospectus. KPMG CARDENAS DOSAL, S.C. /s/ Luis Gonzalo Garcia Delgado Luis Gonzalo Garcia Delgado Mexico City, Mexico December 30, 1999