-
公开(公告)号：US20230120458A1
公开(公告)日：2023-04-20
申请号：US17898652
申请日：2022-08-30
发明人： Anthony M. Bieniek , Brian E. Bond
摘要： Novel tools and techniques are provided for implementing easy digital subscriber line (“DSL”) signal detection. In various embodiments, after a connector of a signal detector has been inserted into a network service port, a processor of the signal detector may determine whether at least one C-tone is present on at least one signal wire communicatively coupled to the network service port, the at least one C-tone being indicative of network service being ready for provision via the at least one signal wire. If so, the processor of the signal detector may cause a display device to indicate to a user that the network service port is ready to provide the network service. A modem can then be installed by connecting with the network service port. The connector, the processor, and the display device are integrated within a single, compact, handheld form factor of the signal detector.
-
公开(公告)号：US10419071B2
公开(公告)日：2019-09-17
申请号：US16252793
申请日：2019-01-21
申请人： DENSO CORPORATION
IPC分类号： H04B3/00 , H04B3/42 , H03K19/0175 , H03K19/0185 , H04B3/02 , H04L25/02 , H03K5/1252 , H03K17/687
摘要： A ringing suppression circuit is provided at a node having a communication circuit executing communication with another node by transmitting a differential signal through a pair of communication lines. The ringing suppression circuit includes: a suppressor configured to perform a suppression operation to suppress ringing occurred with a transmission of the differential signal by connecting a resistive component between the pair of communication lines; and a reference potential provider configured to provide a reference potential, which corresponds to a midpoint potential of the pair of communication lines during a steady state, to an intermediate point of the resistive component.
-
公开(公告)号：US3270144A
公开(公告)日：1966-08-30
申请号：US41505264
申请日：1964-12-01
发明人： GEORG VOGEL , HILMAR SCHONEMEYER , LORENZ GASSER
摘要： 998,083. Speech immunity circuits. STANDARD TELEPHONES & CABLES Ltd. April 3, 1964 [April 6, 1963], No. 13826/64. Heading H4R. A multi-frequency code receiving equipment comprises a number of receivers equipped with speech immunity circuits the outputs from which, i.e. E1 to En, Fig. 1, are fed to a code checking equipment C which gives an output D on receipt of a signal by any, or any particular combination, of the receivers. The output D initiates the operation of two timing devices Z 1 and Z2. Z1 produces an output after a delay tp if the output on D is maintained during this time, and this output X1 via an " OR " gate O provides an enabling input to the " AND " gates U1 to Un and thus passes signals from the receivers to the evaluating device in accordance with the received signals, the " AND " gates being self-holding on their receiver inputs since their outputs are coupled back to the inputs of " OR " gates O to On. When the received signals cease, signal D ceases, but the output X2 of timing circuit Z2 is maintained for a time tv, thus the enabling signal B is maintained for this time. The time tv is arranged to be just less than the minimum possible gap between signals and thus ensures that a gap in the received signal of less than the time tv has no effect on the signals A1 to An passed to the evaluating means and the register. A number of inhibit gates may be provided between the receivers and the " OR " gates O1 to On which gates are blocked by the signal B and thus prevent spurious signals on the receiver outputs from affecting the signals to the register during the evaluation period. The invention is a modification of the code receiving system described in Specification 980,155.
摘要翻译： 998,083。 言语免疫电路。 标准电话和电缆有限公司1964年4月3日（1963年4月6日），第13826/64号。 标题H4R。 多频代码接收设备包括多个具有语音抗扰电路的接收机，输出端即E1至En， 1被馈送到代码检查设备C，其通过接收器的任何或任何特定组合在接收到信号时给出输出D. 输出D启动两个定时装置Z 1和Z 2的操作。 如果在此期间维持D上的输出，则Z1在延迟tp之后产生输出，并且该输出X1经由“或”门O提供对“与”门U1至Un的使能输入，从而使来自接收器的信号 根据接收到的信号到评估设备，“AND”门在其接收器输入端上自我保持，因为它们的输出被耦合回“O”门O到On的输入。 当接收到的信号停止时，信号D停止，但定时电路Z2的输出X2保持一个时间tv，因此这时保持使能信号B. 时间tv被布置成刚好小于信号之间的最小可能间隙，从而确保小于时间tv的接收信号中的间隙对传递给评估装置和寄存器的信号A1至An没有影响。 可以在接收器和“OR”门O1至On之间提供多个禁止门，其中门被信号B阻塞，从而防止接收机输出上的杂散信号在评估期间影响到寄存器的信号。 本发明是在规范980,155中描述的代码接收系统的修改。
-
-
公开(公告)号：US4436962A
公开(公告)日：1984-03-13
申请号：US363422
申请日：1982-03-30
摘要： A call coverage arrangement in a telephone system. Any station served by the system may be assigned to a call coverage group as a principal station. A coverage group includes the identities of a plurality of call covering stations for the principal station and an indication of the order of preference of the covering stations. Call coverage criteria are stored for principal stations specifying circumstances under which calls intended for the principal stations are redirected to coverage. A covered call is redirected sequentially to each of the covering stations in a coverage group in the order of preference until the call is answered or abandoned. The coverage criteria include options based on both the state of a principal's station (active, busy, idle, etc.) and the class of an incoming call (internal, external, priority). Principal stations are equipped with a "send all calls" button. The button may be operated while a call is arriving to redirect the call without waiting for automatic coverage to take effect. To give a caller control over the disposition of a call scheduled for coverage, the caller is alerted at the time a coverage criterion is satisified that the call is scheduled for coverage. Thereafter, a short time interval is provided during which the caller may abandon, activate the automatic generation and storage of a callback message or wait for the call to be redirected to coverage.
摘要翻译： 电话系统中的呼叫覆盖安排。 系统所服务的任何一个台可以被分配给一个呼叫覆盖组作为主站。 覆盖组包括用于主站的多个呼叫覆盖站的标识以及覆盖站的偏好顺序的指示。 存储主要站点的呼叫覆盖标准，指定主要站点的呼叫被重定向到覆盖范围的情况。 覆盖的呼叫被按顺序重定向到覆盖组中的覆盖站中的每个覆盖站，直到呼叫被应答或放弃。 覆盖标准包括基于主站的状态（主动，忙碌，空闲等）和来电（内部，外部，优先级）的类别的选项。 主站配有“发送所有通话”按钮。 当呼叫到达时可以操作该按钮以重定向呼叫而不等待自动覆盖生效。 为了使呼叫者对安排进行覆盖的呼叫的处理进行控制，在满足覆盖准则的情况下呼叫者被呼叫为呼叫计划进行覆盖。 此后，提供短时间间隔，在该时间间隔期间，呼叫者可以放弃，激活回呼消息的自动生成和存储或等待呼叫被重定向到覆盖。
-
公开(公告)号：US4232293A
公开(公告)日：1980-11-04
申请号：US76148
申请日：1979-09-17
申请人： Harold H. Harris
发明人： Harold H. Harris
CPC分类号： H04Q3/00
摘要： A line unit interfaces voice band signals and wide band signals extending from D.C. into the voice band between an analog line and a digital telecommunication facility. The line unit includes an analog to digital converter, a control circuit for generating one of two control signals and a line circuit. The line circuit includes a hybrid circuit in a first signal path for carrying voice band analog signals, and a second signal path for carrying wide band analog signals from the analog line. The signals in either signal path are transmitted to the analog to digital converter for encoding by way of a first switch or a second switch connected in series with the first and second signal paths respectively. The first and second switches are alternately conductive in response to one or the other of the control signals respectively.
摘要翻译： 线路单元将从D.C.延伸到语音频带的语音频带信号和宽带信号连接到模拟线路和数字电信设施之间。 线路单元包括模数转换器，用于产生两个控制信号之一的线路电路的控制电路。 线路电路包括用于承载语音模拟信号的第一信号路径中的混合电路和用于承载来自模拟线路的宽带模拟信号的第二信号路径。 任一信号路径中的信号通过分别与第一和第二信号路径串联连接的第一开关或第二开关发送到模数转换器进行编码。 响应于一个或另一个控制信号，第一和第二开关交替导通。
-
-
公开(公告)号：US2282465A
公开(公告)日：1942-05-12
申请号：US38090941
申请日：1941-02-27
发明人： EDWARDS PAUL G
IPC分类号： H04B3/42
CPC分类号： H04B3/42
-
公开(公告)号：US1697933A
公开(公告)日：1929-01-08
申请号：US14431026
申请日：1926-10-26
发明人： SHACKLETON SAMUEL P
IPC分类号： H04B3/42
CPC分类号： H04B3/42
-
公开(公告)号：US1589395A
公开(公告)日：1926-06-22
申请号：US33167819
申请日：1919-10-18
发明人： JACOBS OLIVER B
IPC分类号： H04B3/42
CPC分类号： H04B3/42
-
-
-
-
-
-
-
-
-
搜索结果
44 条记录 (耗时 0.012 秒)