Telecommunications bandwidth exchange company Band-X expects up to 20 per cent of this year's revenue to come from Asia, according to founder and chairman Marcus de Ferranti. 'The operating turnover of the business should be about US$50 million this year up from US$16 million last year,' said Mr de Ferranti. Turnover in 2002 is expected to reach about US$150 million, according to Mr de Ferranti. Band-X has undertaken work outside operating its basic bandwidth exchange for telecoms companies that need to introduce bandwidth trading systems. 'We are increasingly doing value-added service work on top of the basic exchange work in response to the market wanting to see higher margins,' said Mr de Ferranti. The private British company has exchanges operating in Hong Kong, Bombay, London, New York, Amsterdam, Frankfurt and Dublin. Band-X set up in Hong Kong last July when it acquired local bandwidth market place operator International Telecommunications Exchange Centre. About 90 per cent of its turnover comes from voice traffic, but this proportion is expected to fall in the next few years. 'Overall, while the percentage of the business is highest in voice traffic at the moment . . . in four years' time it will be 50:50 between voice and data,' he said.