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35 records (took 0.022 seconds)

    32.
    发明专利
    未知

    公开(公告)号：DE60100927T2

    公开(公告)日：2004-08-12

    申请号：DE60100927

    申请日：2001-05-22

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： BODNAR BOHDAN LEW ,  BYERS CHARLES CALVIN ,  DUNN JAMES PATRICK

    IPC: H04L12/46 ,  H04L12/56 ,  H04L12/26

    Abstract: Apparatus and a method for routing packets having destination addresses in their header. The routing modules of the router are of two types: simple routing modules which can only route packets whose destination address is stored in a limited memory of the module for storing corresponding output port addresses, and default modules which are used to find the identity of an output port for routing all other packets received by the simple routing modules of the router. Advantageously, the processing load of the simple routing modules is smoothed because these modules do not have to perform the complex searching functions required to find destination addresses not readily accessible in their memory. Advantageously, the single or small number of default routing modules can have sophisticated memory and processor facilities for searching over a very large number of destination addresses and for concentrating the process of sending queries to other routers for additional information.

    33.
    发明专利
    未知

    公开(公告)号：DE69905807D1

    公开(公告)日：2003-04-17

    申请号：DE69905807

    申请日：1999-04-27

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： DUNN JAMES PATRICK ,  KOZIK JACK

    IPC: H04M3/00 ,  H04L12/64 ,  H04L29/12 ,  H04M7/00 ,  H04M7/06 ,  H04Q3/00

    Abstract: A method and apparatus for selectively establishing a connection via a telephone network, or via the Internet. A network access switch decides whether to use the telephone network or the Internet. If connections are established using the Internet, the establishment of connection is controlled using existing CCS7 interoffice signaling messages. Advantagesouly, this permits most of the switching control software to be retained and allows the access switches to interface with the present array of operations support systems.

    ECHO CANCELLATION DEVICE WITH SELF-DEACTIVATION
    34.
    发明专利
    ECHO CANCELLATION DEVICE WITH SELF-DEACTIVATION 未知

    公开(公告)号：CA2316509A1

    公开(公告)日：2001-02-28

    申请号：CA2316509

    申请日：2000-08-22

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： ZHANG PENG ,  DUNN JAMES PATRICK

    IPC: H04L27/01 ,  H04B3/23 ,  H04B3/20

    Abstract: An echo canceling system with self deactivation includes an echo canceller based on an adaptive filter, and an echo detector. The adaptive filter determines an estimate of an echo signal present in an untreated signal received from a "near" end of a communications channel. In order to produce an echo-canceled received signal , the echo canceller subtracts the estimated echo from the untreated received signal. T he echo detector compares the energy of the untreated received signal and the energy of the echo-canceled received signal. The difference represents the energy in the estimated echo signal generated by the adaptive filter. If this energy is large, significan t echo is present. The echo canceller remains activated, and the echo detector selects the echo - canceled received signal for output. If the estimated echo energy is small, little or no cancelable echo is present. The echo canceller is deactivated, and the echo detector selects the untreated received signal for output. Where plural channels of echo cancellation are provided, the deactivated echo canceller may be reallocated to service anoth er communications channel.

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