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公开(公告)号：US5970139A
公开(公告)日：1999-10-19
申请号：US781270
申请日：1997-01-10
CPC分类号： H04M7/0096 , H04M19/005 , H04M19/02 , H04M3/005
摘要： A technique for powering telephone lines using an unbalance current source and current sink; and a technique for improving attenuation/frequency distribution and return loss (impedance matching) of transformer-coupled wire-line communications circuits by using secondary series capacitance and an AC current pump signal source; and a generation of ringing voltage as positive voltage pulses with respect to a negative power supply voltage; and a technique for removal of AC power ripple by using an active linear floating filter for the purpose of powering telephone line circuits, and a technique for injection of real time tone samples into T1 transmissions circuits by use of a T1 framer idle code register.The combination of the above five circuit techniques provides for the hardware implementation of a single printed circuit board embodiment (Line Interface Unit LIU) of a plurality of communications functions including a T1 channel service unit, a ringing generator, power converters, a ringback tone generator, and a channel bank controller. The LIU supports selectable T1 standards of communications. Dual 12-channel telephone line voice cards plug into the LIU card to provide a complete T1 channel bank control process and apparatus. The invention solves telephone line interface, power filtering, ringing generation, and tone injection problems with lower component complexity, costs, and physical size than prior art solutions.
摘要翻译： 使用不平衡电流源和电流接收器为电话线供电的技术; 以及通过使用次级串联电容和交流电流泵浦信号源来改善变压器耦合有线通信电路的衰减/频率分布和回波损耗（阻抗匹配）的技术; 并产生相对于负电源电压的正电压脉冲的振铃电压; 以及通过使用用于为电话线路电路供电的有源线性浮动滤波器来消除AC电力纹波的技术，以及通过使用T1成帧器空闲码寄存器将实时音调样本注入到T1传输电路中的技术。 上述五种电路技术的组合提供了包括T1信道服务单元，振铃发生器，功率转换器，回铃音发生器的多个通信功能的单个印刷电路板实施例（线路接口单元LIU）的硬件实现 ，以及频道银行控制器。 LIU支持可选择的T1通信标准。 双路12通道电话线路语音卡插入LIU卡，提供完整的T1通道银行控制流程和设备。 本发明解决了电话线路接口，功率滤波，振铃发生和色调注入问题，其具有比现有技术解决方案更低的组件复杂性，成本和物理尺寸。
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公开(公告)号：US5881148A
公开(公告)日：1999-03-09
申请号：US48691
申请日：1998-03-26
CPC分类号： H04M7/0096 , H04M19/005 , H04M19/02 , H04M3/005
摘要： A technique for powering telephone lines using an unbalanced current source and current sink; and a technique for improving attenuation/frequency distribution and return loss (impedance matching) of transformer-coupled wire-line communications circuits by using secondary series capacitance and an AC current pump signal source; and a generation of ringing voltage as positive voltage pulses with respect to a negative power supply voltage; and a technique for removal of AC power ripple by using an active linear floating filter for the purpose of powering telephone line circuits, and a technique for injection of real time tone samples into T1 transmissions circuits by use of a T1 framer idle code register. The combination of the above five circuit techniques provides for the hardware implementation of a single printed circuit board embodiment (Line Interface Unit LIU) of a plurality of communications functions including a T1 channel service unit, a ringing generator, power converters, a ringback tone generator, and a channel bank controller. The LIU supports selectable T1 standards of communications. Dual 12-channel telephone line voice cards plug into the LIU card to provide a complete T1 channel bank control process and apparatus. The invention solves telephone line interface, power filtering, ringing generation, and tone injection problems with lower component complexity, costs, and physical size than prior art solutions.
摘要翻译： 使用不平衡电流源和电流电源为电话线供电的技术; 以及通过使用次级串联电容和交流电流泵浦信号源来改善变压器耦合有线通信电路的衰减/频率分布和回波损耗（阻抗匹配）的技术; 并产生相对于负电源电压的正电压脉冲的振铃电压; 以及通过使用用于为电话线路电路供电的有源线性浮动滤波器来消除AC电力纹波的技术，以及通过使用T1成帧器空闲码寄存器将实时音调样本注入到T1传输电路中的技术。 上述五种电路技术的组合提供了包括T1信道服务单元，振铃发生器，功率转换器，回铃音发生器的多个通信功能的单个印刷电路板实施例（线路接口单元LIU）的硬件实现 ，以及频道银行控制器。 LIU支持可选择的T1通信标准。 双路12通道电话线路语音卡插入LIU卡，提供完整的T1通道银行控制流程和设备。 本发明解决了电话线路接口，功率滤波，振铃发生和色调注入问题，其具有比现有技术解决方案更低的组件复杂性，成本和物理尺寸。
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公开(公告)号：US5870466A
公开(公告)日：1999-02-09
申请号：US781486
申请日：1997-01-10
CPC分类号： H04M7/0096 , H04M19/005 , H04M19/02 , H04M3/005
摘要： A technique for powering telephone lines using an unbalance current source and current sink; and a technique for improving attenuation/frequency distribution and return loss (impedance matching) of transformer-coupled wire-line communications circuits by using secondary series capacitance and an AC current pump signal source; and a generation of ringing voltage as positive voltage pulses with respect to a negative power supply voltage; and a technique for removal of AC power ripple by using an active linear floating filter for the purpose of powering telephone line circuits, and a technique for injection of real time tone samples into T1 transmissions circuits by use of a T1 framer idle code register.The combination of the above five circuit techniques provides for the hardware implementation of a single printed circuit board embodiment (Line Interface Unit LIU) of a plurality of communications functions including a T1 channel service unit, a ringing generator, power converters, a ringback tone generator, and a channel bank controller. The LIU supports selectable T1 standards of communications. Dual 12-channel telephone line voice cards plug into the LIU card to provide a complete T1 channel bank control process and apparatus. The invention solves telephone line interface, power filtering, ringing generation, and tone injection problems with lower component complexity, costs, and physical size than prior art solutions.
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公开(公告)号：US6144736A
公开(公告)日：2000-11-07
申请号：US346406
申请日：1999-07-01
CPC分类号： H04M7/0096 , H04M19/005 , H04M19/02 , H04M3/005
摘要： A technique for powering telephone lines using an unbalance current source and current sink; and a technique for improving attenuation/frequency distribution and return loss (impedance matching) of transformer-coupled wire-line communications circuits by using secondary series capacitance and an AC current pump signal source; and a generation of ringing voltage as positive voltage pulses with respect to a negative power supply voltage; and a technique for removal of AC power ripple by using an active linear floating filter for the purpose of powering telephone line circuits, and a technique for injection of real time tone samples into T1 transmissions circuits by use of a T1 framer idle code register. The combination of the above five circuit techniques provides for the hardware implementation of a single printed circuit board embodiment (Line Interface Unit LIU) of a plurality of communications functions including a T1 channel service unit, a ringing generator, power converters, a ringback tone generator, and a channel bank controller. The LIU supports selectable T1 standards of communications. The invention solves telephone line interface, power filtering, ringing generation, and tone injection problems with lower component complexity, costs, and physical size than prior art solutions.
摘要翻译： 使用不平衡电流源和电流接收器为电话线供电的技术; 以及通过使用次级串联电容和交流电流泵浦信号源来改善变压器耦合有线通信电路的衰减/频率分布和回波损耗（阻抗匹配）的技术; 并产生相对于负电源电压的正电压脉冲的振铃电压; 以及通过使用用于为电话线路电路供电的有源线性浮动滤波器来消除AC电力纹波的技术，以及通过使用T1成帧器空闲码寄存器将实时音调样本注入到T1传输电路中的技术。 上述五种电路技术的组合提供了包括T1信道服务单元，振铃发生器，功率转换器，回铃音发生器的多个通信功能的单个印刷电路板实施例（线路接口单元LIU）的硬件实现 ，以及频道银行控制器。 LIU支持可选择的T1通信标准。 本发明解决了电话线路接口，功率滤波，振铃发生和色调注入问题，其具有比现有技术解决方案更低的组件复杂性，成本和物理尺寸。
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公开(公告)号：US5768368A
公开(公告)日：1998-06-16
申请号：US781487
申请日：1997-01-10
CPC分类号： H04M7/0096 , H04M19/005 , H04M19/02 , H04M3/005
摘要： A technique for powering telephone lines using an unbalance current source and current sink; and a technique for improving attenuation/frequency distribution and return loss (impedance matching) of transformer-coupled wire-line communications circuits by using secondary series capacitance and an AC current pump signal source; and a generation of ringing voltage as positive voltage pulses with respect to a negative power supply voltage; and a technique for removal of AC power ripple by using an active linear floating filter for the purpose of powering telephone line circuits, and a technique for injection of real time tone samples into T1 transmissions circuits by use of a T1 framer idle code register. The combination of the above five circuit techniques provides for the hardware implementation of a single printed circuit board embodiment (Line Interface Unit LIU) of a plurality of communications functions including a T1 channel service unit, a ringing generator, power converters, a ringback tone generator, and a channel bank controller. The LIU supports selectable T1 standards of communications. Dual 12-channel telephone line voice cards plug into the LIU card to provide a complete T1 channel bank control process and apparatus. The invention solves telephone line interface, power filtering, ringing generation, and tone injection problems with lower component complexity, costs, and physical size than prior art solutions.
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公开(公告)号：US5740241A
公开(公告)日：1998-04-14
申请号：US440099
申请日：1995-05-12
CPC分类号： H04M7/0096 , H04M19/005 , H04M19/02 , H04M3/005
摘要： A technique for powering telephone lines using an unbalance current source and current sink; and a technique for improving attenuation/frequency distribution and return loss (impedance matching) of transformer-coupled wire-line communications circuits by using secondary series capacitance and an AC current pump signal source; and a generation of ringing voltage as positive voltage pulses with respect to a negative power supply voltage; and a technique for removal of AC power ripple by using an active linear floating filter for the purpose of powering telephone line circuits, and a technique for injection of real time tone samples into T1 transmissions circuits by use of a T1 framer idle code register. The combination of the above five circuit techniques provides for the hardware implementation of a single printed circuit board embodiment (Line interface Unit LIU) of a plurality of communications functions including a T1 channel service unit, a ringing generator, power converters, a ringback tone generator, and a channel bank controller. The LIU supports selectable T1 standards of communications. Dual 12-channel telephone line voice cards plug into the LIU card to provide a complete T1 channel bank control process and apparatus. The invention solves telephone line interface, power filtering, ringing generation, and tone injection problems with lower component complexity, costs, and physical size than prior art solutions.
摘要翻译： 使用不平衡电流源和电流接收器为电话线供电的技术; 以及通过使用次级串联电容和交流电流泵浦信号源来改善变压器耦合有线通信电路的衰减/频率分布和回波损耗（阻抗匹配）的技术; 并产生相对于负电源电压的正电压脉冲的振铃电压; 以及通过使用用于为电话线路电路供电的有源线性浮动滤波器来消除AC电力纹波的技术，以及通过使用T1成帧器空闲码寄存器将实时音调样本注入到T1传输电路中的技术。 上述五种电路技术的组合提供了多个通信功能的单个印刷电路板实施例（线路接口单元LIU）的硬件实现，包括T1信道服务单元，振铃发生器，功率转换器，回铃音发生器 ，以及频道银行控制器。 LIU支持可选择的T1通信标准。 双路12通道电话线路语音卡插入LIU卡，提供完整的T1通道银行控制流程和设备。 本发明解决了电话线路接口，功率滤波，振铃发生和色调注入问题，其具有比现有技术解决方案更低的组件复杂性，成本和物理尺寸。
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