For now on Jajah will provide its proprietary telephony infrastructure, payment processing, and customer care to Yahoo. It will be in charge of connection between users on Yahoo Messenger and all aspects of customer support and billing.
The terms of the deal were undisclosed.
Jajah takes an approach called web-activated telephony, using VoIP to connect traditional phones (landline or mobile). Calls are made without download or user-installed software, and in most cases at rates lower than those of traditional phone companies or even free of charge.