发明名称 System and apparatus for generating within the premises a dial tone for enhanced phone services
摘要 <p>A system and apparatus includes a premises phone connected to a phone network along a first communication channel. A dial tone controller generates within the premises a dial tone to the premises phone along a second communication channel. The dial tone controller receives and processes signals received from the premises phone along the second communication channel and can generate DTMF tones for establishing communication to the phone network based on generated signals received from the premises phone. A switch is operatively connected between the premises phone and the dial tone controller for switching the premises phone from communication with the phone network along the first communication channel and communication with the dial tone controller along the second communication channel so that the premises phone receives a dial tone from and sends signals to the dial tone controller. &lt;IMAGE&gt;</p>
申请公布号 EP0748101(A2) 申请公布日期 1996.12.11
申请号 EP19960303798 申请日期 1996.05.29
申请人 AT&T IPM CORP. 发明人 SIZER II, THEODORE
分类号 H04M3/42;H04Q3/58;H04M3/44;H04M11/00;H04M15/00;H04Q1/453;H04Q3/42;(IPC1-7):H04M3/42 主分类号 H04M3/42
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