Yahoo! Voice

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Yahoo! Voice
Developer(s) Yahoo!
Operating system Microsoft Windows
Mac OS X
Type VoIP, Internet Phone service

Yahoo! Voice is a Voice over IP PC-PC, PC-Phone and Phone-to-PC service [1], [2] provided by Yahoo! via its Yahoo! Messenger instant messaging application. Yahoo! Voice uses the Session Initiation Protocol (SIP), GIPS codec and the DialPad engine for voice transport. Since 2008 the service has been provided by JAJAH, an outsourced VoIP provider.[3]


Yahoo! Phone Out

PC-to-Phone calls to landlines and mobile phones with the Yahoo! Phone Out service (charges apply). Conference calls from PC to Multiple (PSTN) phones or mobiles is currently not supported.

The limitations imposed by packet switched networks, specially referring to the packet scheduling service (be it over a cable, over the air, etc), introduce a problematic operation since end users do not always count with last mile access networks that provide real time packet scheduling, which means a prioritized and very shortly delayed transmission of data, which is needed to the perception of a natural communication with no delays or holes; In contrast the vast majority of users have Best Effort packet scheduling services (most of the operators who provide ADSL, wifi, wimax, satellite without implying that those technologies are restricted, only the business models are) for all their data transmission needs and therefore when the demand of other users is high or the over the air conditions (radio signal strength/interference ratio/BER) are not met the communication is felt delayed, cut, bad quality; But this Behavior is not VoIP Solution specific problem but business specific or access technology specific (in the case certain technical aspects must be met for an always non-delayed data transmission), therefore the same problems are found in any other type of VoIP solution.

Yahoo! Phone In

Phone-to-PC calls on computer can be received from landline or mobile phones. With the Yahoo! Phone In service, one can choose a phone number in three countries (US, UK and France).

Unsupported Functionality

See also


External links

Personal tools

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