ESI Announces Converged Communications Platform; Company Introduces ESI-600 System for the Enterprise.

PLANO, Texas -- ESI continues its reputation as a leading manufacturer of business telephone systems, announcing the ESI-600 System for Converged Communications. The ESI-600 is designed to integrate ESI's advanced voice and data capabilities with the flexibility, expandability, and ease-of-use required in the office environment.

"The ESI-600 is the latest advancement in our long history of providing leading-edge products that are easy to use and cost-effective to own," said Doug Boyd, President/Chief Operating Officer of ESI. "The market has clearly embraced IP-based converged systems. The ESI-600's converged, standards-based design lets businesses choose the communications technology that's best for them, while benefiting fully from our uniquely rich feature set."

Capitalizing on ESI's extensive expertise in product development, the ESI-600 offers organizations the flexibility to create a customized and powerful communication infrastructure that can grow as their business needs change. Utilizing digital communications and state-of-the-art Internet Protocol (IP) solutions, customers choose the mix they need. Built-in voice mail, auto attendant, and automatic call distribution (ACD) come standard with the ESI-600. It also supports the latest generation of ESI's VIP (Visually Integrated Phone) family of unified messaging solutions, ESI PC Attendant Console, and the unique ESI Presence Management solution. For larger customers, multiple ESI-600s can be deployed across the enterprise, creating virtually seamless connectivity and fully supported phone features.

"The system is so easy to use, offices will see a marked improvement in productivity," Boyd added. "Entire companies benefit from the ESI-600's integration of call-processing efficiency, advanced phone features, and tremendously flexible architecture."

Selected ESI-600 features

--Converged communications -- The ESI-600 operates as all-digital, all-IP, or any combination of the two technologies, making it easier for end users to have the phone system that will best suit their specific communications needs.

--Enterprise-class capacities -- The ESI-600 supports up to 408 stations and up to 168 phone lines. The proven fifth-generation integrated voice mail has 32 built-in channels independent of system ports, stores up to 1,200 hours of voice messages, and supports nearly 1,500 voice mailboxes. The conference bridge allows up to 64 simultaneous members, with dynamic assignment of up to 16 members per conference.

--Standards-based design -- The ESI-600's IP capabilities are supported by compliance with these major industry standards: UDP; Layer 3 QoS support via DiffServ; G.711, G.726, and G.729 packet compression; 802.3 100Base-TX Ethernet interfaces; Layer 2 QoS support through compliance with 802.1p for voice packet prioritization and 802.1q for VLAN (Layer 2) support; 802.3af Power over Ethernet; DHCP; and SIP.

--Support for ESI Presence Management -- This unique solution uses RFID scanning technology in concert with the ESI-600 to offer innovation in entrance security, documented tracking of users' work hours and attendance history, presence status, and call control.

--ESI PC Attendant Console integration -- Designed for a busy office's multitasking phone system attendant, ESI PC Attendant Console makes advanced call handling as simple as "drag-and-drop." This new application for use with Microsoft(R) Outlook(R) provides one-click access to as many as 200 extensions, voice mailboxes, ACD departments, and speed-dial numbers.

--48-Key IP Feature Phone II -- Exclusive to the ESI-600, the 48-Key IP Feature Phone II provides the full ESI feature set either "locally" (on a LAN) or remotely from virtually any location with a broadband connection. The 48-Key IP Feature Phone II offers the convenience of Power over Ethernet (PoE) or can be powered using an AC adapter.

--Cordless Handset support -- ESI Cordless Handsets, the first cordless products to encompass the ESI feature set, are fully supported on the ESI-600.

Availability

The ESI-600, ESI PC Attendant Console, and the IP versions of the ESI Cordless Handsets will be available in the second quarter of 2006 through ESI's network of Certified Resellers.

For more information about ESI and its products, see www.esi-estech.com.

About ESI

ESI designs and manufactures telephone systems and components for businesses. ESI's systems offer advanced technological design and extreme ease of use, yet are very cost-competitive. The product lines include the ESI-600 System for Converged Communications, IVX All-In-One Digital Phone Systems, and IP E-Class All-In-One IP Systems. ESI's business phone systems are sold through hundreds of factory-trained Certified Resellers. Founded in 1987, ESI is a rapidly growing, privately held corporation with headquarters in Plano, Texas. More information on ESI and its products is available at www.esi-estech.com. IVX is a registered trademark of ESI. Any other registered trademarks or tradenames mentioned herein are the property of their products' or services' respective owners. ESI phone systems are protected by various U.S. Patents, granted and pending.

Product details are subject to change without notice.