Estech Systems, Inc. (ESI)

Estech Systems, Inc. (ESI) is a premiere provider high-performance phone systems and cloud services for businesses and organizations. ESI uses advanced technology to design IP and digital communications systems that integrate built-in capabilities, advanced features, and highly-differentiated applications into flexible products that are easy-to-use and keep employees productive.  Founded in 1987, ESI is a privately held corporation with headquarters in Plano, Texas. ESI communications systems are protected by various U.S. patents, granted and pending.  For more information about ESI and its products, visit www.esi-estech.com.  Follow ESI on Twitter at https://twitter.com/esiphones.