Lexington, Mass., May 6, 2008 – Arbor Networks, Inc., a leading provider of secure service control solutions for global business networks, announced today that Tata Communications, a leading provider of the new world of communications, has globally deployed Arbor’s Peakflow SP platform (“Peakflow SP”) and Threat Management System (TMS) as part of its Distributed Denial of Service (DDoS) Detection and Mitigation security service offering for its Internet service provider (ISP), wholesale and enterprise customers.

Tata Communications’ DDoS Detection and Mitigation security services provide a fully integrated solution for global, real-time application-layer analysis of the IP traffic traversing Tata Communications’ global IP backbone. The services monitor and analyze customer traffic in real time and on a 24x7x365 basis. The service provides proactive notification of actionable events, helping improve Tata Communications’ customer’s visibility into the security and availability of their network. Undesirable traffic is filtered in Tata Communications’ backbone before customer resources are impacted, leading to optimum utilization of bandwidth. In addition to protection against security threats, Tata Communications utilizes Arbor Peakflow SP for addressing network issues such as traffic and routing instability.

“Tata Communications’ implementation on the Arbor Peakflow platform represents the largest unified global footprint of an integrated, network-based DDoS Detection and Mitigation service in the world,” said John Landau, senior vice president, global managed services, Tata Communications. “Through our DDoS offering, we enable our customers to maintain real-time visibility into DDoS threats and traffic anomalies, in addition to providing them with the ability to maintain full availability of their critical network systems and applications; all enabled through our globally distributed and highly scalable network-based detection and mitigation facilities.”

Peakflow SP provides real-time, network-wide anomaly detection and reporting of routing and traffic patterns across an entire network, enabling its users to interpret and visualize threats on the network. Arbor Networks’ users can quickly determine the root cause of changes in traffic, which may be the result of new applications, or violations in usage policies, and offer the ability to evaluate peering relationships with partners to optimize transit performance.

“For global providers of information and communications technology services like Tata Communications, the security and availability of their customer networks is the utmost concern,” said Rob Malan, Arbor Networks co-founder and chief technology officer. “Peakflow SP provides network-wide visibility, security and traffic engineering capabilities; Arbor’s TMS enables them to offer their ISP, wholesale and enterprise customers a managed security service that provides clean bandwidth through deep packet inspection that filters attack traffic while allowing legitimate traffic on towards its final destination.”

About Arbor Networks
Arbor Networks is a leading provider of security and network management solutions for global business networks, including more than 70 percent of the world’s Internet service providers and many of the largest enterprise networks in use today. Arbor delivers secure service control solutions that both protect global networks from the edge to the core from a host of threats, as well as help customers gain network-wide visibility they can translate into actionable business intelligence to generate new forms of revenue and maintain a competitive advantage. Arbor’s solutions give customers a single, unified view into their networks’ performance, helping them to quickly detect anomalous behavior, mitigate threats and enforce policy. Arbor also maintains the world’s first globally scoped threat analysis network – ATLAS – which uses technology embedded in the world’s largest ISP networks to sense and report on comprehensive worldwide threat intelligence.
To learn more about Arbor Networks, please visit: http://www.arbornetworks.com . To learn more about ATLAS, please visit: http://atlas.arbor.net . To learn more about the Arbor Security Engineering & Response Team (ASERT) – the company’s security research arm – please visit the ASERT blog: http://asert.arbornetworks.com .

About Tata Communications
Tata Communications Limited along with its global subsidiaries (Tata Communications) is a leading global provider of the new world of communications. The company leverages its Tata Global Network, vertical intelligence and leadership in emerging markets to deliver value-driven, globally managed solutions to the Fortune 1000 and midsized enterprises, service providers and consumers.

The Tata Communications portfolio includes transmission, IP, converged voice, mobility, managed network connectivity, hosted data center, communications solutions and business transformation services to global and Indian enterprises and service providers, as well as broadband and content services to Indian consumers. The Tata Global Network encompasses one of the most advanced and largest submarine cable networks, a Tier-1 IP network, connectivity to more than 200 countries across 300 PoPs, and more than 1 million square feet of data center space. Tata Communications serves its customers from its offices in 80 cities in 40 countries worldwide. Tata Communications has a strategic investment in South African operator Neotel, providing the company with a strong anchor to build an African footprint.

The number one global international wholesale voice operator and number one provider of international long distance, enterprise data and Internet services in India, the company was named "Best Wholesale Carrier" at the World Communications Awards in 2006 and was named the "Best Pan-Asian Wholesale Provider" at the 2007 Capacity Magazine Global Wholesale Telecommunications Awards for the second consecutive year.

Now the leading integrated provider to drive and deliver a new world of communications, Tata Communications became the unified global brand for VSNL, VSNL International, Teleglobe, Tata Indicom Enterprise Business Unit, and CIPRIS on February 13, 2008.

Tata Communications Ltd. is a part of the $29 billion Tata Group; it is listed on the Bombay Stock Exchange and the National Stock Exchange of India and its ADRs are listed on the New York Stock Exchange (NYSE: TCL).

For more information on Tata Communications visit www.tatacommunications.com .

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Note to Editors: Arbor Networks, Peakflow, ATLAS and the Arbor Networks logo are trademarks of Arbor Networks, Inc. All other brands may be the trademarks of their respective owners.

Forward-looking and cautionary statements
Certain words and statements in this release concerning Tata Communications and its prospects, and other statements, including those relating to Tata Communications’ expected financial position, business strategy, the future development of Tata Communications’ operations, and the general economy in India, are forward-looking statements. Such statements involve known and unknown risks, uncertainties and other factors, including financial, regulatory and environmental, as well as those relating to industry growth and trend projections, which may cause actual results, performance or achievements of Tata Communications, or industry results, to differ materially from those expressed or implied by such forward-looking statements. The important factors that could cause actual results, performance or achievements to differ materially from such forward-looking statements include, among others, failure to increase the volume of traffic on Tata Communications’ network; failure to develop new products and services that meet customer demands and generate acceptable margins; failure to successfully complete commercial testing of new technology and information systems to support new products and services, including voice transmission services; failure to stabilize or reduce the rate of price compression on certain of the company’s communications services; failure to integrate strategic acquisitions and changes in government policies or regulations of India and, in particular, changes relating to the administration of Tata Communications’ industry; and, in general, the economic, business and credit conditions in India. Additional factors that could cause actual results, performance or achievements to differ materially from such forward-looking statements, many of which are not in Tata Communications’ control, include, but are not limited to, those risk factors discussed in Tata Communications’ various filings with the United States Securities and Exchange Commission. These filings are available at www.sec.gov. Tata Communications is under no obligation to, and expressly disclaims any obligation to, update or alter its forward-looking statements.

U.S. Contact:
Kevin Whalen
Director, Public Relations
Arbor Networks
781-464-1220
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International Contact:
Harvard Public Relations for Arbor Networks
Elinor David
+44 208 5646310
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