CallTower Announces Microsoft Gold Partner Certification

SAN FRANCISCO, CA, May 19 (MARKET WIRE) --
CallTower, Inc. (www.calltower.com), a leading provider of managed
enterprise-class unified communications solutions for growing businesses,
today announced it has achieved Microsoft Gold Partner Certification with
competencies in Unified Communications Solutions, Hosting Solutions,
Advanced Infrastructure Solutions and Networking Infrastructure
Solutions. With this certification Microsoft has recognized CallTower's
expertise with Microsoft technologies in the growing market for on demand
cloud-based Unified Communications.

"CallTower has been delivering expertise in Microsoft communications
solutions since the beginning and our strong relationship has resulted in
an excellent service for growing businesses that need the benefits of
unified communications but are not in a position to, or do not wish to own
and manage a complete in-house solution," said Bob Barnes, CallTower's
Executive Vice President, Sales, Marketing and Business Development.
"Achieving Gold Certified Partner status is validation of CallTower's
knowledge, expertise and commitment to delivering the leading technology
our customers want and use. One excellent example of our commitment is our
latest offering -- the industry's first pure Microsoft OCS hosted
solution."

As a Gold Certified Partner, CallTower has undergone a comprehensive
examination and analysis by Microsoft and the results showed the highest
level of competence and expertise with its technologies. Microsoft Gold
Certified Partners enjoy the closest working relationship with Microsoft
and receive a rich set of benefits, including access, training and
support, giving them a competitive advantage in the channel.

The Microsoft Partner Program was launched in October 2003 and represents
Microsoft's ongoing commitment to the success of partners worldwide. The
program offers a single, integrated partnering framework that recognizes
partner expertise, rewards the total impact that partners have in the
technology marketplace, and delivers more value to help partners'
businesses be successful.

About CallTower, Inc.

CallTower (www.calltower.com) transforms a company's voice and data
communications into a strategic business tool that provides a competitive
advantage in today's market. CallTower's Unified Communications solutions
provide growing companies with enterprise-class reliability, a single
point of support, productivity-enhancing features and 24/7 service for a
fixed monthly fee. CallTower's communications services are based on the
Cisco(R) CallManager, Cisco(R) IP Contact Center and Microsoft(R)
Exchange Server and Microsoft(R) Live Communications Server through the
proprietary CallTower vXML VoiceCube voice messaging platform.

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