A challenging project for major cell phone company including replacing a 600kva indoor generator with a 1MW diesel generator, replacing three outdated zenith ATS with new Russelectric ATSs. Site has two services with one existing 1MW and Resselectric ATS. EDC carefully commissioned and carefully cut-over new generator and ATSs in a fail-over cascading effect for full redundancy all on maintenance window with zero disruption to the critical communication facility.