ATSI Announces Membership With Arbinet-thexchange


SAN ANTONIO, TX--(Marketwire - August 7, 2007) - ATSI Communications, Inc. (ATSI) (OTCBB: ATSX) announced today the Company's membership with Arbinet-thexchange, Inc. (Arbinet), a NASDAQ traded company, through its wholly owned subsidiary, Digerati Networks, Inc., to buy, sell, deliver and settle VoIP transactions utilizing Arbinet's Internet-based electronic platform. Arbinet is the leading provider of solutions to simplify the exchange of digital communications. Digerati Networks interconnected to Arbinet to sell its VoIP services to the other 700+ voice and data Members that includes the world's 10 largest international carriers and fixed, mobile and VoIP carriers, ISPs and content providers from more than 60 countries who exchange voice, data, content and value added services.

ATSI Sr. Vice President of Technology and Operations, Ruben Caraveo, stated, "As a member of Arbinet, we not only have access to the 700+ members as potential customers, but we can accelerate speed to market for our VoIP services by selling new routes almost immediately through Arbinet's exchange platform." Mr. Caraveo added, "We look forward to maximizing sales opportunities through our membership on Arbinet-thexchange."

ATSI Communications, Inc. operates through its two wholly owned subsidiaries, Digerati Networks, Inc. and Telefamilia Communications, Inc. Digerati Networks, Inc. is a premier global VoIP carrier serving rapidly expanding markets in Asia, Europe, the Middle East, and Latin America, with an emphasis on Mexico. Through Digerati's direct partnerships with established foreign carriers and network operators, interconnection and service agreements, and a NexTone powered VoIP network, ATSI believes it has clear advantages over its competition. Telefamilia Communications provides specialized retail communication services that include VoIP services to the high-growth Hispanic market in the United States. ATSI also owns a minority interest of a subsidiary in Mexico, ATSI Comunicaciones, S.A. de C.V., which operates under a 30-year government issued telecommunications license.

The information in this news release includes certain forward-looking statements that are based upon management's expectations and assumptions about certain risks and uncertainties that can affect future events. Although management believes these assumptions and expectations to be reasonable on the date of this news release, these risks and uncertainties may cause actual events to differ material from managements those contained in this news release. The risks and uncertainties include, but are not limited to, continuing as a going concern, availability and cost of our present vendors and suppliers, and absence of any change in government regulations or other costs associated with data transmission over the Internet or termination of transmissions in foreign countries.

Contact Information: Contact: Jack Eversull The Eversull Group 972-378-7917 972-378-7981 (fax) E-mail: Web Site: www.atsi.net

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