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business telecom solutions

Communications the way they were meant to be.

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Cornerstone is a significant supplier of telecommunications voice and data products, offering telephone and voice mail systems, data networking, and paging systems. We install and service telecom systems throughout the states of Virginia, West Virginia, Maryland and the Washington D.C. metropolitan area, for both state and local governments, as well as the private sector.

We are customer service driven, and our telecom industry experienced team is committed to providing excellence in products and services. Here are a few of our service offerings:


Consultation & Design Solutions

  • Voice Data & Video Communication Systems
  • Voice Over IP Systems
  • Enterprise Voice & Data Networks


Voice Processing Systems Solutions

  • Voice Mail Systems
  • Automated Attendant Systems
  • Integrated Voice Response Systems
  • Predictive Dialer, Call Centers & Telemarketing
  • LAN, E-mail & Fax Integration


Quality Assured Solutions

  • Extended Warranty Plans
  • Maintenance Contracts
  • Competitive Hourly Rates
  • Factory Trained & Certified Technicians
  • Long Term Warranties


Installation & Service Solutions

  • Telephone Systems
  • Small Office Systems
  • Digital Phone Systems
  • Wireless Phone Systems
  • Hotel & Motel Systems
  • Computer Telephone Integration
  • Cloud & IP Based Systems
  • Paging & Sound Systems
  • Network Integrated Voice Processing
  • Call Center Solutions


Cornerstone is an authorized dealer for ESI telecommunication business systems and products, a premiere manufacturer of business telecom systems. In addition, Cornerstone has performed service on NEC, Avaya, Nortel, Mitel, Comdial, and Iwatsu telecommunication systems.

ESI Telecommunication

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VA DCJS License# 11-5911

VA Contractor License# 2705131661