SYSTEMS AND METHODS OF PROVIDING COMMUNICATIONS SERVICES
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United States of America Patent
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app pub date -
Dec 28, 2012
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Jul 27, 2011
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Abstract
An IP telephony system allows a user to register a telephony device that receives its native telephony service from a different telephony service provider as an extension telephone. The user can then place calls through the IP telephony system using the extension telephone. Such calls may or may not be established using the extension telephone's native telephony service provider.
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