ESI is a privately held corporation with headquarters in Plano, Texas, just outside Dallas. Rapid growth, stable management and innovative technology have characterized ESI since its founding in 1987.

ESI designs and manufactures high-efficiency, low-cost business telephone products. These products have earned numerous product awards from industry publications.

Because ESI is an independent U.S. manufacturer that designs and builds its own combined phone and voice mail systems, each ESI product is aggressively priced and possesses unique, leading-edge features. Market agility allows ESI to meet industry needs more efficiently than larger companies, and advanced product design gives ESI a competitive edge over more limited competitors.

Cutting-edge technology, award-winning products and a progressive vision define the ESI difference.

ESI builds products that are easy to install, easy to understand and simple to use.

ESI designs and manufactures innovative business telephone systems for workplaces.

Their award-winning communications systems — digital, IP, and converged — are easy to use, yet packed with advanced capabilities to enhance your competitive edge,and come in a wide range to fit any budget.