PITTSBURGH, August 13 -- Marconi has announced a $3.5 million contract to support the network growth plans of Telefonica Moviles Mexico, a subsidiary of Telefonica. The solution, comprised of Marconi's market-leading synchronous digital hierarchy (SDH) optical multiplexers and power platforms, is being deployed to support the expected subscriber growth for Telefonica Moviles Mexico in 2002. Marconi will provide its MSH41c, SDH-STM4 optical multiplexers and its Vortex power systems, which will power the SDH equipment that carries the network traffic.