Tamilnadu Telecommunications Ltd (TTL), which is the public limited company promoted by TCIL and Tamilnadu Industrial Development Corporation Ltd, has done well in the past two years primarily because of the steady growth in JFT and OFC cables. In 2000-01, it grew from a total turnover of Rs 63.04 crore to Rs 113 crore. The bulk of its revenue has come from the JFT cables. The prime market for its products has been DoT and in order to ensure that it continues to bag the orders, TTL has also acquired the ISO 9002 certification and increased its capacity. This, the company believes, will also help in fetching it more export orders.

The company is diversifying into the manufacture of high value optical fiber cables by entering into a joint venture with Fujikura Limited, Japan, which will provide technological inputs for optical fiber cables.