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1110 Arden Forest
Spring, Texas 77379

Ph 281-397-9220
Fax 281-520-4770





ESI designs and manufactures innovative business telephone systems for workplaces like yours. Our award-winning communications systems ó digital, IP, and converged ó are easy to use, yet packed with advanced capabilities to enhance your competitive edge, and come in a wide range to fit any budget.

ESI's patented X-Class all-in-one phone systems are the latest addition to the ESI product line. With up to 256 communications ports, IVX X-Class boasts the largest capacity among ESIís IVX (Integrated Voice Exchange) family of advanced business telephone systems. IVX X-Class provides voice mail, an automated attendant, and automatic call distribution (ACD). It also supports ESIís VIP enhancement for Microsoft Outlook as well as advanced voice over IP (VoIP) communications. Its many features make the IVX X-Class an attractive choice for a wide variety of organizations.

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