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Huge Growth Seen In Retail VoIP: Page 3 of 4

The researchers suggest Skype had 100 million downloads by mid-April 2005. Of these, 35 million users had registered, and there were 1.2 million SkypeOut accounts.

Skype does not publish subscriber numbers, but it does provide a rolling ticker showing how many minutes it has served. By monitoring this, Point Topic gauged a weekly and daily average of minutes served.

"Dividing by a 'rule of thumb' number of say 7 minutes per day then gives a feel for Skype usage. Doing this for 2 weeks in June 2005 yields an average of 5.6 or 5.3 million 'user-equivalents' for the 2 weeks."

This suggests that many people download the client and do not register, and many people who register never or rarely use Skype, a VoIP soft-client version of the 80:20 rule perhaps.

"But combined with our number for VoiceGlo we estimate that soft client services came to around 5.9 million VoIP users in Q1 2005," said Bosnell.