发明名称 Methods and apparatus for providing toll-free telephone services
摘要 Methods and apparatus for providing toll-free telephone services are disclosed. A disclosed system comprises a telephone network to route a telephone call placed to a toll-free telephone number to one of a Voice over Internet Protocol (VoIP) endpoint, a Plain Old Telephone Service (POTS) endpoint or a dedicated trunk endpoint based on a state of at least one variable.
申请公布号 US2007064685(A1) 申请公布日期 2007.03.22
申请号 US20050227396 申请日期 2005.09.15
申请人 CROCKETT SUSANNE M;LASKEN ROBERT B;LIN RICK Y 发明人 CROCKETT SUSANNE M.;LASKEN ROBERT B.;LIN RICK Y.
分类号 H04L12/66 主分类号 H04L12/66
代理机构 代理人
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