DataCom, Inc.
- Business Telephones and Data sells, installs and services, including voice, data, long distance and internet services. Columbia
- http://www.sctelephones.com/

Commins Construction & Cabling
- Providing complete network solutions and structured cabling systems for the educational marketplace. North Augusta
- http://www.comcabling.net/

SoTel Systems
- Sells new and refurbished telecom and data equipment.
- http://www.sotelsystems.com/

Omni Telecommunications
- Sells and installs new and refurbished telephone and voice processing systems, servicing the upstate area of South Carolina.
- http://www.omni-telecom.com/

Telecom & Data Services
- Telephone equipment sales and service. Wellford
- http://www.telecom-data-services.com/

Johnson Communications
- Provides telephone, data, and intercom systems to business and institutional customers; includes company profile, details on services, and testimonials. Based in Inman.
- http://www.johnsoncom.com/

A3 Communications
- Irmo based company, providing telecommunications and LAN/WAN networking services; includes corporate profile, job openings, and contact information.
- http://www.a3communications.com/