发明授权
- 专利标题: Transparent inband signaling
- 专利标题(中): 透明带内信令
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申请号: US737494申请日: 1991-07-29
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公开(公告)号: US5267305A公开(公告)日: 1993-11-30
- 发明人: John R. Prohs , Nick Efthyvoulos , Michael J. Little , Michael R. Scheid
- 申请人: John R. Prohs , Nick Efthyvoulos , Michael J. Little , Michael R. Scheid
- 申请人地址: CA Pasadena
- 专利权人: Ambassador College
- 当前专利权人: Ambassador College
- 当前专利权人地址: CA Pasadena
- 主分类号: H04M3/42
- IPC分类号: H04M3/42 ; H04M3/428 ; H04M3/51 ; H04M3/523 ; H04M7/00 ; H04Q1/45 ; H04Q1/46 ; H04M3/58 ; H04M3/56
摘要:
A method and apparatus for transparent inband signaling during a telephone conversation provides an advantageous way of enabling a party to a telephone conversation to signal a telecommunications system to perform desired functions. A person signaling a system with a general inband signal, such as DTMF, can do so transparently, that is without the other party hearing the inband signals used. This innovation is based on detecting the inband signal, muting the inband signal to prevent the other party from hearing it, and determining which party generated it while allowing the conversation to continue substantially uninterrupted. The inband signal is delayed prior to muting for a short period of time in an alternate embodiment in order to compensate for the time delay in reliably detecting DTMF signals thus mute the inband signal more completely.
公开/授权文献
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