Calcutta, Jan 21 :     Calcutta Telephones will assume a new role, that of an internet service provider, (ISP) by the end of March. Calcutta Telephones will be linked to the national internet backbone (NIB) by the end of March, sources in the department of telecom (DoT) said. It will be able to provide internet services after completion of the linkage operations. Sources said that work for linking Calcutta Telephones with NIB will start only next week. Videsh Sanchar Nigam Ltd (VSNL) will provide the international gateway to Calcutta Telephones. Inaugurating the eastern India IT show COMPASS 2000, Tapan Sikdar, minister of state for telecommunications said, 'All measures are being taken to enable Calcutta Telephones become an ISP soon.' About 90 participants, representing all segments of the IT industry have set up 164 stalls and pavilions at COMPASS 2000.