Low Voltage Systems Contractor. Specializing in Siemens Fire, Bogen Intercom, Tek Tone Nurse Call, Voice and Data Cabling, Paxton and DSX Access Control. Commercial Electrical Systems can provide the following to your Organization - Complete Service and Monitoring Agreements, Complete Testing and Certification Services, Engineered CADD Drawings, 24 Hour On-Call Technicians, Fully Stocked Service Vehicles, Factory Trained Technicians, NICET Certified Technicians, RCDD Certified Technicians, Bonding Capacities, Design Build Assistance and Specification Generation Assistance.