Zultys, founded in 2001, is showing what's possible for Open Standards IP communications and telephony. Our Open Standards IP technology is the building block for our award-winning IP PBX systems. Zultys develops products that enable companies and organizations to deploy integrated communications systems.

ESI designs and manufactures innovative business telephone systems for workplaces like yours. These exceptional systems — providing digital and IP communications — are easy to use, yet packed with advanced capabilities to enhance your competitive edge, and come in a wide range to fit any budget.