Charleston Systems, a division of Jacksonville Sound & Communications, Inc. designs, installs, services, and integrates a wid ... e variety of low voltage communication, security and life safety electronic systems. Allow us to provide a proposal for one, or a combination of these systems for your facility. Fire Alarm and Voice Evacuation Nurse Patient Communication Intercom and Public Address Mass Notification Professional Sound and Audio Visual Networking and Fiber Optics Access Control Closed Circuit TV Commercial Security Premise Wire Distribution Sound Masking MATV/TV Distribution Instructional TV Additionally, our service department provides 24 hour service to our customer base, including General Maintenance Agreements, Fire Alarm System Inspections, Nurse Call System Inspections, and Central Station Monitoring of Fire Alarm and Security systems. read more