News Release

AT&T Global Clearinghouse to Support Voice over VPN Service

Launches AT&T Quality of Service (QoS) Monitoring Tool
Jun 23, 1999

HONG KONG -- June 23, 1999 -- At the "Voice on the Net Europe 99" conference in Helsinki, Finland today, the AT&T Global Clearinghouse announced support for the AT&T Voice Over Virtual Private Network (VPN) Service.

This enables AT&T Global Clearinghouse members to offer AT&T Voice Over VPN Service to their corporate customers, which further expands their service portfolios as IP solution providers. The AT&T Voice Over VPN Service benefits end customers by enabling them to operate additional applications on their VPN, as well as streamlining network management and increasing bandwidth efficiency.

The AT&T Global Clearinghouse also announced an innovative tool to measure the quality of voice over IP traffic. Developed by AT&T Labs, the AT&T Quality of Service (QoS) Monitoring tool, helps members monitor and measure the end-to-end quality of voice over IP between known members. The AT&T QoS Monitoring tool is also applicable for IP transit and VPN services.

The Internet industry has been debating for some time how service providers can effectively measure the quality of voice over the Internet. By introducing a practical and simple tool, the AT&T QoS Monitoring tool enables members to better manage their bandwidth utilization and take corrective action when necessary.

"We are delighted to launch both the AT&T Voice Over VPN Service and a practical and easy to use tool for members to assess the quality of IP traffic," said Lena Chung, managing director, Online Services, AT&T Asia/Pacific. "We are also pleased to support multiple platforms, which offer our members even greater choice in delivering voice over IP services."

In addition to the Clarent and VocalTec platforms already supported, the AT&T Global Clearinghouse today announced clearing and settlement services for traffic from Cisco gateways.

"Cisco is pleased that AT&T is supporting Cisco Voice Gateway solutions through the AT&T Global Clearinghouse," said Roland Acra, vice president and general manager, Cisco Systems. "This gives our customers the ability to terminate calls globally over AT&T's IP network and offers our service provider customers a high-quality option for delivering international voice and value-added services."

"ISPs and carriers are looking for new value-added applications to offer increased functionality and meet the ever-changing needs of their customers," said JoAnn Patrick-Ezzell, president and CEO, AT&T Asia/Pacific. "The AT&T Global Clearinghouse will continue to provide cutting edge applications to encourage the delivery of next generation IP communications services."

Established in April 1998, the AT&T Global Clearinghouse provides ISPs and carriers with the platform to offer Internet communication services, including telephone-to-telephone voice and fax services. By joining the AT&T Global Clearinghouse members have instant access to a network connecting to more than 220 countries, saving time and cost in negotiating and managing numerous agreements with hundreds of ISPs. The AT&T Global Clearinghouse has members in Europe, North and South America and Asia/Pacific.

AT&T Corp. is the world's premier voice and data communications company, serving more than 80 million customers, including consumers, businesses and government. With annual revenues of more than $53 billion and 140,000 employees, AT&T provides services to virtually every country and territory around the world.

AT&T runs the world's largest, most sophisticated communications network and the largest digital wireless network in North America. The company is a leading supplier of data and Internet services for businesses and the nation's largest direct Internet service provider to consumers. AT&T's businesses are backed by the research and development capabilities of AT&T Labs, which is working to create the information services and communications network of tomorrow. More information about AT&T can be found at and about the AT&T Global Clearinghouse at

Cisco Systems

Cisco Systems, Inc. (NASDAQ:CSCO) is theworldwide leader in networking for the Internet.

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