Sify Launches First-of-Its-Kind WiMAX Solution with Mobility Features.

- Deploys Proxim's Advanced Wireless Product -

CHENNAI, India -- Sify Limited (Nasdaq National Market: SIFY), a leader in consumer Internet and Enterprise Services in India with global delivery capabilities, today launched a first-of-its-kind WiMAX solution with Mobility features, with the deployment of Proxim Wireless Corporation's advanced wireless product.

Sify Limited has chosen and deployed Proxim's Tsunami MP.11 WiMAX product line as the core communications platform for last mile access using the 5.8 GHz frequency band. Sify has deployed over 700 Tsunami MP.11 base stations and 3,500 subscriber units to provide Internet access, voice and video broadband services to enterprise, residential and cybercafe subscribers in over 200 cities throughout India.

Speaking on the occasion, Mr. Bhaskar S, Chief Technology Officer, Sify Limited, said, "WiMAX is the future of Wireless Internet Communications especially in fast developing countries like India. With this launch, Sify has made a timely and strategic addition to its connectivity solutions portfolio. We are confident that this offering will enhance our customers' experience and help us cater to their fast growing wireless information needs."

Commenting on Sify's partnership with Proxim, Mr. Bhaskar said, "After testing and evaluating products from a number of manufacturers over a period of eight months, we chose Proxim's product line because the company met all our criteria, and its point-to-multipoint products offer the best packet processing capacity for last mile access."

"Sify's deployment is certainly a strong endorsement of our WiMAX technology and product line," said Lionel Chmilewsky, Senior Vice President- International, Proxim Wireless. "As India's premier provider of broadband access services, Sify is setting the standard for delivering the 'triple play' of voice, data and video to subscribers wherever they are located throughout the country. We are pleased and honoured to be their partner in this effort."

Drawing on Proxim's leadership in wireless and WiMAX, the Tsunami MP.11 product family of rugged base stations, indoor and outdoor subscriber units and accessories have been developed as a platform to enable WiMAX capabilities for license-free frequency bands. Awarded a 2006 Product Innovation Award by Frost & Sullivan for "Truly innovative WiMAX solutions", the Tsunami MP.11 Series supports converged video, voice and data transmission in both fixed and mobile applications.

The launch event took place today aboard a catamaran cruising through Mumbai's harbour off the Gateway of India with a live demonstration of a 3.3 Ghz based product of 802.16d WiMAX standard.

About Proxim Wireless Corporation

Proxim Wireless Corporation is a wholly owned subsidiary of Terabeam, Inc. (NASDAQ: TRBM). Proxim Wireless is a global pioneer in developing and supplying scalable broadband wireless networking systems for enterprises, governments, and service providers. From Wi-Fi to wireless Gigabit Ethernet - our WLAN, mesh, point-to-multipoint, and point-to-point products are available through our extensive global channel network, backed by world-class support. Proxim is a Principal Member of the WiMAX Forum and is ISO-9001 certified. Information about Proxim and its products and support can be found at http://www.proxim.com.

Safe Harbor Statement

Statements in this press release that are not statements of historical facts are forward-looking statements that involve risks, uncertainties, and assumptions. Our actual results may differ materially from the results anticipated in these forward-looking statements. The forward-looking statements involve risks and uncertainties that could contribute to such differences including those relating to difficulties or delays in supplying products with the features, performance, compliances, certifications, cost, price, and other characteristics desired by customers. Further information on these and other factors that could affect our actual results is and will be included in filings made by Terabeam from time to time with the Securities and Exchange Commission and in our other public statements.

About Sify Limited

Sify is among the largest Internet, network and e-Commerce services companies in India, offering end-to-end solutions with a comprehensive range of products delivered over a common Internet backbone infrastructure. This Internet backbone reaches 186 cities and towns in India. A significant part of the company's revenue is derived from Corporate Services, which include corporate connectivity, network and communications solutions, security, network management services and hosting. A host of blue chip customers use Sify's corporate service offerings. Consumer services include broadband home access, dial up connectivity and the iWay cyber cafe chain across 158 cities and towns. The company's network services, Data Center operations and customer relationship management are accredited ISO 9001:2000.

For more information about Sify, visit www.sifycorp.com.

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. The forward-looking statements contained herein are subject to risks and uncertainties that could cause actual results to differ materially from those reflected in the forward-looking statements. Sify undertakes no duty to update any forward-looking statements.

For a discussion of the risks associated with Sify's business, please see the discussion under the caption "Risks Related to Our Business" in the company's report on Form 6-K for the quarter ended September 30, 2006 which has been filed with the United States Securities and Exchange Commission and is available by accessing the database maintained by the SEC at www.sec.gov.