Network Defenders is a premier provider of communications, low voltage, electrical, and underground construction services in California. With more than 70 years of experience, we are committed to providing the very best service to our customers and community. Residential - Phone Services - High-Speed Internet - Lighting & Electrical Services - Home Audio & Video - Home Security Business - Business Communication Systems - Phone Systems - Security Systems - Audio/Visual - IT Services & Network Maintenance Agreements Construction - Electrical Contracting - LED Lighting/Lighting Retrofit - Structured Cabling - Underground Installation - Boring and Trenching.