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Callserve registers over a half million Microsoft Messenger users for Internet telephony service; Callserve celebrates success of Microsoft partnership

Callserve, the leading global Internet telephony company, today celebrates the success of its Microsoft partnership with over a half million (535,000) registrations to its Internet telephony service through MSN Messenger.

Paul Duffy, founder and CEO of Callserve, says, "Callserve is proud to...  


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