The offering, dubbed MCI Web Calling for Windows Live Call, will be available through Windows Live Messenger, the forthcoming successor to MSN Messenger. It combines Windows Live software, VoIP capabilities and MCI's global network.
The firms are testing the service as part of a Windows Live Messenger limited beta with subscriptions initially available in the US. They expect to jointly deliver the PC-to-phone calling capabilities to France, Germany, Spain and the UK in the coming weeks.
Subscribers will be able to place calls to and from more than 220 countries with rates starting at $.023 per minute to the US, Canada, the UK and Western Europe during the beta testing period.
MCI Web Calling customers will receive up to one hour of free calls. Final pricing will be determined when the product officially launches in 2006.
Blake Irving, corporate vice president of the MSN Communication Services and Member Platform group at Microsoft, said: "Our customers are going to love this. "
Customers will be able to sign up for MCI Web Calling via the Windows Live Messenger client. MCI will manage customer registration, terminating calls, customer account management, customer support and billing for the PC-to-phone voice service.
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