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    MAINTAINING AN OFF-HOOK CONDITION IN A LINE POWERED DAA DURING A CALL BRIDGE
    1.
    发明专利
    MAINTAINING AN OFF-HOOK CONDITION IN A LINE POWERED DAA DURING A CALL BRIDGE 未知

    公开(公告)号：CA2322253C

    公开(公告)日：2005-04-19

    申请号：CA2322253

    申请日：2000-10-04

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： WILLIAMS MICHAEL G ,  FISCHER JONATHAN HERMAN ,  SMITH LANE A ,  TOTH MICHAEL S ,  LATURELL DONALD RAYMOND

    IPC: H04M1/738 ,  H04M19/00 ,  H04M11/06 ,  H04L29/12

    Abstract: A line powered data access arrangement (DAA) is disclosed which adaptive ly allows proper operation with power supplied from a telephone line as conditions warrant, while at the same time satisfying the relevant requirements of many countries. In the line powered codec, a startup procedure for the international line powered codec uses register settings, e.g., country-specific register settings, which are powered and maintained from the low voltage side (e.g., from the PC or modem side) of the line powered codec. In this way, even during low line power conditions the programmed state of the line powered codec can be maintained, thus a default condition will not necessarily returned to by the line powered codec upon reset due to a power loss in the telephone line. In another aspect, a charge storage devi ce such as a charge capacitor is charged from a charge pump formed from a differenti al clock signal from the low voltage side. A current and voltage detection module in the line powered codec is always powered from the telephone line. Upon detection of a n off/ hook signal or a power down condition, the current detection module determin es if/when the current and voltage on the telephone line is sufficient to power certain circuits on the line powered codec. If sufficient power is not present, the line powered codec does not power up. However, the line powered codec will power up if sufficient current is detected. In another aspect, a plurality of power rails may be provided. A first power rail may be associated with the line power, a second power rail may be associated with a low voltage side power source, e.g., a charge storage device. A third (and other) power rails may be switchably connected to either the firs t power rail or second power rail as line power conditions and on-hook/off-hook condition s warrant.

    4.
    发明专利
    未知

    公开(公告)号：DE60034197D1

    公开(公告)日：2007-05-16

    申请号：DE60034197

    申请日：2000-10-03

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FISCHER JONATHAN HERMAN ,  LATURELL DONALD RAYMOND ,  SMITH LANE A ,  TOTH MICHAEL S ,  WILLIAMS MICHAEL G

    IPC: H04M1/738 ,  H04M3/00 ,  H04M19/00 ,  H04M19/08

    Abstract: A line powered data access arrangement (DAA) is disclosed which adaptively allows proper operation with power supplied from a telephone line as conditions warrant, while at the same time satisfying the relevant requirements of many countries. In the line powered codec, a startup procedure for the international line powered codec uses register settings, e.g., country-specific register settings, which are powered and maintained from the low voltage side (e.g., from the PC or modem side) of the line powered codec. In this way, even during low line power conditions the programmed state of the line powered codec can be maintained, thus a default condition will not necessarily returned to by the line powered codec upon reset due to a power loss in the telephone line. In another aspect, a charge storage device such as a charge capacitor is charged from a charge pump formed from a differential clock signal from the low voltage side. A current and voltage detection module in the line powered codec is always powered from the telephone line. Upon detection of an off-hook signal or a power down condition, the current detection module determines if/when the current and voltage on the telephone line is sufficient to power certain circuits on the line powered codec. If sufficient power is not present, the line powered codec does not power up. However, the line powered codec will power up if sufficient current is detected. In another aspect, a plurality of power rails may be provided. A first power rail may be associated with the line power, a second power rail may be associated with a low voltage side power source, e.g., a charge storage device. A third (and other) power rails may be switchably connected to either the first power rail or second power rail as line power conditions and on-hook/off-hook conditions warrant.

    Line transponder device for requesting service information from telephone line
    6.
    发明专利
    Line transponder device for requesting service information from telephone line 未知

    公开(公告)号：DE10102915A1

    公开(公告)日：2001-09-06

    申请号：DE10102915

    申请日：2001-01-23

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FISCHER JONATHAN HERMAN ,  LATURELL DONALD RAYMOND ,  SMITH LANE A

    IPC: H04L1/24 ,  H04M3/30 ,  H04M3/26

    Abstract: The line transponder device includes a tuned circuit having a defined resonant frequency. The tuned circuit, when excited by an excitation signal, responds to a certain resonance signal supplied to the line (101). A modulator modulates the excitation signal in response to the resonant frequency being supplied. The modulator is preferably switched off if the resonant frequency is not present on the line. The modulator includes a bridge circuit, and a pattern generator for changing a current in on branch of the bridge circuit. Independent claims are included for a method of identifying service information from a telephone line, and an apparatus for identifying service information from a telephone line.

    7.
    发明专利
    未知

    公开(公告)号：DE69838600T2

    公开(公告)日：2008-07-24

    申请号：DE69838600

    申请日：1998-04-21

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FISCHER JONATHAN HERMAN ,  LATURELL DONALD RAYMOND

    IPC: H04B1/58 ,  H03H11/28 ,  H04B3/02 ,  H04L25/02 ,  H04L25/12

    Abstract: A network interface circuit (300) employs an extended feedback circuit topology (302) for impedance matching across a high voltage boundary between a line side portion and low voltage portion of a network. The network interface circuit includes an operational amplifier-based circuit (311-313) which is responsive to a signal (VTX) applied from user equipment on the low voltage portion. Specifically, the present invention includes a transmit path (301) having a first, second. and third amplifier circuit (311-313) and an impedance element (Z5), and a receive path (302) that includes a transfer function implemented as a second order low pass filter (310) for correcting amplifier gain and phase effects in the complex feedback loop of the circuit. The output impedance is remotely set by multiplying the impedance element by a scale factor to match the network impedance. The feedback loop is extended across the high voltage boundary using high voltage interfaces such as linear optical coupling devices (LOCs).

    8.
    发明专利
    未知

    公开(公告)号：DE60037230D1

    公开(公告)日：2008-01-10

    申请号：DE60037230

    申请日：2000-10-03

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FISCHER JONATHAN HERMAN ,  HOLLENBACH KEITH EUGENE ,  LATURELL DONALD RAYMOND ,  SMITH LANE A ,  TOTH MICHAEL S ,  ZHU WEILIN

    IPC: H02J7/00 ,  H04M3/00 ,  H04M1/00 ,  H04M11/00 ,  H04M19/00 ,  H04M19/08

    Abstract: A line powered data access arrangement (DAA) is disclosed which adaptively allows proper operation with power supplied from a telephone line as conditions warrant, while at the same time satisfying the relevant requirements of many countries. In the line powered codec, a startup procedure for the international line powered codec uses register settings, e.g., country-specific register settings, which are powered and maintained from the low voltage side (e.g., from the PC or modem side) of the line powered codec. In this way, even during low line power conditions the programmed state of the line powered codec can be maintained, thus a default condition will not necessarily returned to by the line powered codec upon reset due to a power loss in the telephone line. In another aspect, a charge storage device such as a charge capacitor is charged from a charge pump formed from a differential clock signal from the low voltage side. A current and voltage detection module in the line powered codec is always powered from the telephone line. Upon detection of an off-hook signal or a power down condition, the current detection module determines if/when the current and voltage on the telephone line is sufficient to power certain circuits on the line powered codec. If sufficient power is not present, the line powered codec does not power up. However, the line powered codec will power up if sufficient current is detected. In another aspect, a plurality of power rails may be provided. A first power rail may be associated with the line power, a second power rail may be associated with a low voltage side power source, e.g., a charge storage device. A third (and other) power rails may be switchably connected to either the first power rail or second power rail as line power conditions and on-hook/off-hook conditions warrant.

    9.
    发明专利
    未知

    公开(公告)号：DE60034197T2

    公开(公告)日：2007-12-20

    申请号：DE60034197

    申请日：2000-10-03

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FISCHER JONATHAN HERMAN ,  LATURELL DONALD RAYMOND ,  SMITH LANE A ,  TOTH MICHAEL S ,  WILLIAMS MICHAEL G

    IPC: H04M1/738 ,  H04M3/00 ,  H04M19/00 ,  H04M19/08

    Abstract: A line powered data access arrangement (DAA) is disclosed which adaptively allows proper operation with power supplied from a telephone line as conditions warrant, while at the same time satisfying the relevant requirements of many countries. In the line powered codec, a startup procedure for the international line powered codec uses register settings, e.g., country-specific register settings, which are powered and maintained from the low voltage side (e.g., from the PC or modem side) of the line powered codec. In this way, even during low line power conditions the programmed state of the line powered codec can be maintained, thus a default condition will not necessarily returned to by the line powered codec upon reset due to a power loss in the telephone line. In another aspect, a charge storage device such as a charge capacitor is charged from a charge pump formed from a differential clock signal from the low voltage side. A current and voltage detection module in the line powered codec is always powered from the telephone line. Upon detection of an off-hook signal or a power down condition, the current detection module determines if/when the current and voltage on the telephone line is sufficient to power certain circuits on the line powered codec. If sufficient power is not present, the line powered codec does not power up. However, the line powered codec will power up if sufficient current is detected. In another aspect, a plurality of power rails may be provided. A first power rail may be associated with the line power, a second power rail may be associated with a low voltage side power source, e.g., a charge storage device. A third (and other) power rails may be switchably connected to either the first power rail or second power rail as line power conditions and on-hook/off-hook conditions warrant.

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