公开(公告)号：US07660408B1

公开(公告)日：2010-02-09

申请号：US09560581

申请日：2000-04-28

Applicant: Spiro Poulis ,  John Evans ,  Shayne Messerly

Inventor： Spiro Poulis ,  John Evans ,  Shayne Messerly

IPC: H04M1/00 ,  H04M9/00

CPC classification number: H04M1/7385 ,  H04M11/066

Abstract: The present invention discloses circuits for isolating and attenuating signals generated by a telephone network. In disclosed embodiments, a metering pulse signal is isolated from the terminals of the connecting device, and then attenuated with an impedance that is synthesized with a programmable digital signal processor. Embodiments also utilize the digital signal processor to synthesize a termination impedance for the connecting device. The termination impedance matches closely the characteristic impedance of the network, so as to minimize wave reflections and the like.

Abstract translation: 本发明公开了一种用于隔离和衰减由电话网络产生的信号的电路。 在所公开的实施例中，计量脉冲信号与连接装置的端子隔离，然后用与可编程数字信号处理器合成的阻抗衰减。 实施例还利用数字信号处理器来合成连接装置的终端阻抗。 终端阻抗与网络的特性阻抗密切相关，以便最小化波反射等。

公开(公告)号：US06697485B1

公开(公告)日：2004-02-24

申请号：US09189964

申请日：1998-11-10

Applicant: Spiro Poulis ,  John Evans ,  Shayne Messerly

Inventor： Spiro Poulis ,  John Evans ,  Shayne Messerly

IPC: H04M100

CPC classification number: H04M1/76

Abstract: The present invention provides apparatus and methods for attenuating signals received from a source over a data transmission line, having an unknown resistance, to achieve optimized signals in various data terminal and data communications equipment. In a preferred embodiment, a resistor network is operably coupled between the transmission line and a means for processing the signal, such as a digital processor, an ADC and a DAC. The resistor network comprises a termination resistor that is associated with a termination voltage, a variable resistor and another resistor. During use, a switch is operably positioned between a plurality of switch positions so that two voltage measurements will lead to the determination of the voltage of the source and the termination voltage within the resistor network. Once these voltages are known, the unknown resistance can be estimated. Thereafter, the length of the transmission line may be determined because of known resistance-per-unit-distance characteristics of the transmission line. In response to knowing this length, the digital processor selects a desired resistance value for the variable resistor so that, upon adjustment of the variable resistor by the DAC, the signal becomes a largest-possible input at the ADC.

Abstract translation: 本发明提供用于衰减在数据传输线上从源接收的具有未知电阻的信号的装置和方法，以在各种数据终端和数据通信设备中实现优化的信号。 在优选实施例中，电阻网络可操作地耦合在传输线和用于处理信号的装置之间，诸如数字处理器，ADC和DAC。 电阻网络包括与终端电压相关联的终端电阻器，可变电阻器和另一个电阻器。 在使用期间，开关可操作地定位在多个开关位置之间，使得两个电压测量将导致确定电阻器网络内的电源电压和终止电压。 一旦这些电压已知，可以估计未知电阻。 此后，由于传输线的已知电阻 - 单位 - 距离特性，可以确定传输线的长度。 响应于知道该长度，数字处理器为可变电阻器选择期望的电阻值，使得在通过DAC调节可变电阻器时，该信号在ADC处变为最大可能的输入。

公开(公告)号：US06661880B1

公开(公告)日：2003-12-09

申请号：US09879754

申请日：2001-06-12

Applicant: Spiro Poulis ,  Matt Smith ,  Ned Plasson ,  Jeffrey A. Hanline

Inventor： Spiro Poulis ,  Matt Smith ,  Ned Plasson ,  Jeffrey A. Hanline

IPC: H04M1100

CPC classification number: H04M11/06

Abstract: Systems and methods for embedding, detecting and extracting access information from a dial tone of a private branch exchange system. The access information is embedded at the zero crossings of the dial tone. This has a minimal effect on the audible quality of the dial tone. A connecting device, such as a modem, receives the altered dial tone having access information. The access information is extracted by the connecting device and displayed to a user. The access information is automatically downloaded by the connecting device upon connecting to the private branch exchange without interaction from a user by having the connecting device go off hook such that the dial tone is received. The connecting device detects, extracts and displays the access information. After the access information is displayed to a user, the connecting device can await further user interaction or immediately make use of the access information.

Abstract translation: 用于从私人交换机系统的拨号音嵌入，检测和提取访问信息的系统和方法。 访问信息嵌入拨号音的过零点。 这对拨号音的可听到的质量影响最小。 诸如调制解调器的连接装置接收具有访问信息的改变的拨号音。 访问信息由连接设备提取并显示给用户。 连接设备在连接到专用交换机交换机时，无需用户进行交互即可自动下载访问信息，方法是使连接设备脱钩，以便接收到拨号音。 连接设备检测，提取和显示访问信息。 在向用户显示访问信息之后，连接设备可以等待进一步的用户交互或立即使用访问信息。

公开(公告)号：US06654461B1

公开(公告)日：2003-11-25

申请号：US09395633

申请日：1999-09-14

Applicant: Spiro Poulis ,  John Evans

Inventor： Spiro Poulis ,  John Evans

IPC: H04M704

CPC classification number: H04M3/04

Abstract: Provided is a circuit for terminating a ring signal of a telephone network. A physical impedance is combined with a synthesized impedance to produce an impedance having a magnitude substantially equal to the ring termination impedance of a telephone network. The synthesized impedance is created by generating a current from a voltage controlled current source. By controlling the magnitude of the generated current, the magnitude of the synthesized impedance is also controlled. Because the specified ring termination impedances are known, a satisfactory impedance can be synthesized which results in the ring signal being properly terminated.

Abstract translation: 提供了用于终止电话网络的振铃信号的电路。 物理阻抗与合成阻抗组合以产生具有基本上等于电话网络的环路终端阻抗的幅度的阻抗。 通过从电压控制电流源产生电流来产生合成阻抗。 通过控制发电电流的大小，也控制合成阻抗的幅度。 由于指定的环形终端阻抗是已知的，所以可以合成令人满意的阻抗，这导致环形信号正确地终止。