HERNDON, Va., July 25 -- NEC Corp. announced that it has been selected to supply its SpectralWave dense wavelength division multiplexing (DWDM) system by Telefonos De Mexico, S.A. de C.V. (TELMEX), the largest telecommunication operator in Mexico. The company completed the shipment, which included an SDH fiber optic system, through NEC de Mexico. The TELMEX project is the first DWDM deployment for NEC in Latin America. NEC has been a major SDH fiber optical network vendor in Mexico. NEC's terrestrial DWDM system has been deployed in the United States, Japan, Asia and Europe, and the company has supplied DWDM systems to large submarine cable projects such as APCN2, AJC and EAC2.