ESI (Estech Systems, Inc.) delivers high-performance communications systems designed to meet the needs of growing businesses. As a premier provider of on-premises and cloud-based unified communications solutions, ESI offers innovative and uniquely integrated systems that enable our partners to deliver intuitive and affordable VoIP solutions to their customers. A progressive vision, leading-edge technology, legendary reliability, and outstanding products have defined ESI since it was founded in 1987. ESI is a privately-held corporation with the headquarters located in Plano, Texas (Dallas-Ft. Worth area). |