Estech Systems, Inc. (ESI) designs, manufactures and markets advanced, highly featured, business communications systems for small and mid-size companies. To date, ESI has built and shipped over 100,000 systems.

ESI was the first manufacturer to build a truly "combined" telephone and voice mail system and has numerous patents granted on the unique design and features. ESI is highly regarded for the reliability of its products and for supporting unique, real-world applications that provide practical and effective features. Progressive vision, leading-edge technology, legendary reliability and award-winning products define ESI.

ESI products consist of: IVX S-Class, IVX E-Class, IP E-Class, IP based networking, and Unified Messaging. Estech Systems, Inc. (ESI) designs, manufactures and markets advanced, highly featured, business communications systems for small and mid-size companies. To date, ESI has built and shipped over 100,000 systems.