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. In May, 2003, ESI moved into a spacious facility (shown) that houses both its headquarters and its manufacturing operation.

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

Why ESI - Watch a Video.

Company Strengths

• Is committed to developing that deliver advanced features and ease of use.
• Maintains a proactive posture and market flexibility to take advantage of rapidly changing communications technology. As an industry leader in voice processing and storage techniques, ESI is well-positioned for future innovations. In addition, the company's sustained, long-term growth provides the stability and resources to assure superior customer support.
• Maintains high ethical standards, produces high-quality products and promotes a healthy work environment. Each employee takes pride in the company's growth and success. ESI also participates in a variety of community involvement projects.

Technology

By using high-efficiency components such as the Motorola 68000-class processor and custom-designed disk operating sub-system, ESI products meet stringent voice processing requirements.

While many other manufacturers were late to discover the superior performance and reliability that digital signal processing (DSP) provides in voice storage and retrieval, ESI has been using DSP technology since 1992.

DSP technology provides many operating advantages. A DSP rapidly samples and converts speech and DTMF tones from analog waves into digital data. Storing this data electronically not only improves system speed and reliability, but it also gives users more flexibility while storing, retrieving and moving voice messages. Because DSP technology requires less discrete hardware and fewer integrated components, ESI is also able to design products that are more compact and economical.