ESI Communications Servers achieve interoperability with Broadvox GO! SIP Trunki ESI and Broadvox deliver scalable

Plano, Texas, June 18, 2009 — Estech Systems, Inc. (ESI) and Broadvox today announced that interoperability certification has been achieved with ESI Communications Servers and Broadvox SIP Trunks. ESI joins the growing list of companies whose products have completed the rigorous certification process, providing more opportunities for customized solutions for businesses — whether small, medium, or enterprise-class.

Broadvox GO! SIP Trunking, used in conjunction with ESI Communications Servers, delivers an affordable and scalable IP communications solution. ESI Communications Servers are compact and powerful, delivering standards-based technology in a flexible, easy-to-use, and cost-effective package.

“ESI and Broadvox work to provide customers the opportunity to choose when and just how much IP technology is right for their business,” said Pete Sandrev, Broadvox’s Vice President of Customer Experience. “Both Broadvox and ESI strive to deliver cost-effective solutions to their customers who are ready for the communications functionality and flexibility enjoyed by businesses that migrate to IP communications.”

“ESI is excited to receive certification from an industry leader like Broadvox,” said Doug Boyd, ESI’s President and Chief Operating Officer. “Throughout the development of our SIP trunking capabilities, ESI engineers have been working closely with Broadvox to successfully complete the extensive certification process to ensure ‘real-world’ system operation. Broadvox is an acknowledged ITSP leader with a robust network, and we are confident that our customers will appreciate the unparalleled services available from Broadvox.”

Customers select the ESI Communications Server which meets their needs now and for years to come. ESI Communications Server models, from the ESI-1000 to the ESI-50, vary primarily by their call-handling capacity, so IP communications solutions are available to companies ranging in size from SMBs to enterprises. ESI Communications Servers are fully flexible platforms that can support both digital technology and IP-to-the-desktop in any combination.

The Broadvox GO! SIP Trunking product line provides for business continuity during a crisis or company growth and unlimited geographical distribution to eliminate or reduce the number of PRIs and branch-office PBXs. With unlimited local and long-distance calling, as well as discounted toll-free and international calling, GO! SIP Trunking includes DIDs, E911, Local Number portability that allows businesses to keep their current phone numbers, and Enhanced Local Numbers. Broadvox connectivity options include DSL, T1, and DS3.

About Broadvox

Founded in 2001, Broadvox is a worldwide leader in providing integrated managed VoIP services to SMB, enterprise, and carrier customers. It has deployed one of the largest full-featured global VoIP networks and is trusted by more than 160 telecommunications carriers, CLECs, ISPs, and over 1,000 enterprises to terminate and originate over 8,000,000,000 minutes annually. The Broadvox Network Operations Center provides the reliability, security, and quality of service required by the world’s most discriminating customers. Broadvox offers SIP Trunking, SIP origination and termination services, and hosted communications solutions. Broadvox is headquartered in Dallas, Texas.

For more information about Broadvox, visit www.broadvox.com.

About ESI

ESI (Estech Systems, Inc.) designs and manufactures business communications systems and components. ESI’s systems offer advanced technological design and ease-of-use, yet are very cost-competitive. The product line includes ESI Communications Servers, which support both digital and IP technologies in any desired combination. ESI’s business communications systems are sold through hundreds of factory-trained Certified Resellers. Founded in 1987, ESI is a privately held corporation with headquarters in Plano, Texas. Any registered trademarks or trade names mentioned herein are the property of their products’ or services’ respective owners. ESI communications systems are protected by various U.S. Patents, granted and pending. Product details are subject to change without notice.

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