Four leading telecom multi-national companies - AT&T, BT, MCI Worldcom and Equant - may face penal action in India for providing long distance services without having a licence that may have caused revenue loss to the government.

After completing the preliminary investigation on behalf of the Department of Telecommunications, the Central Bureau of Investigation is ready to file a case against these companies for a thorough probe into the financial loss.

It is alleged that these four companies caused a loss to the exchequer by depriving the DoT of licence fee - a one-time entry fee of Rs 25 crore (Rs 250 million), prior to January 1, 2006,  plus 15 per cent of Average Gross Revenue. From January 2006, the one time entry fee was lowered to Rs 2.5 crore and 6 per cent of AGR.

Asked whether the DoT would formally seek a CBI probe, in which case the agency would file an FIR to take the case forward, sources declined to give a specific comment but said the issue is being examined.

The CBI enquiry also revealed that Indian companies Bharti Airtel [Get Quote], Tata Group company VSNL [Get Quote] (Tata Communications) and Reliance [Get Quote] Infocomm (now RCom) had entered into an agreement with one or more MNC firms from time to time for providing connectivity to their customers in India.