Service provider Pipex has refuted reports that it refuses to back Internet telephony.
People who make international calls at local rates, by using Web data lines for voice, have been blamed for helping to clog the Internet.
Several companies offer software for this, including Microsoft and Netscape.
Richard Woods, corporate communications consultant, admitted that Pipex had asked users to be sparing with netphone software.
He explained: 'At the moment, Internet telephony is a bandwidth-hungry application that could slow down other users.'
But he said Pipex would welcome Net telephony when the H323 Net telephony standard becomes accepted on a universal scale. The standard uses data lines more efficiently than some current methods.
For customers who must use netphones, Pipex has a service called Pipe Xpress, which provides 'burstable bandwidth' technology for users with occasional high-bandwidth demands.
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