公开(公告)号：CA2322253A1

公开(公告)日：2001-04-08

申请号：CA2322253

申请日：2000-10-04

Applicant: LUCENT TECHNOLOGIES INC

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

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, thel ine 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.

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.

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.

公开(公告)号：CA2469390C

公开(公告)日：2007-07-31

申请号：CA2469390

申请日：2000-10-04

Applicant: LUCENT TECHNOLOGIES INC

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

IPC: H04M19/00 ,  H04M11/06

Abstract: The present invention relates to a line powered COder/DECoder (codec) th at is capable of retaining an off-hook condition during a call bridge. The line powered codec is comprised of a high current portion powered by a telephone line coupled to the line powered codec. The codec also includes a low current portion powere d by a voltage source other than the telephone line. The low current portion includ es a register that stores an on-hook/off-hook status of the line powered codec.

公开(公告)号：CA2322252C

公开(公告)日：2005-04-19

申请号：CA2322252

申请日：2000-10-04

Applicant: LUCENT TECHNOLOGIES INC

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

IPC: H02J7/00 ,  H04M1/00 ,  H04M11/00 ,  H04M19/00 ,  H04M19/08 ,  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 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 firs t power rail or second power rail as line power conditions and on-hook/off-hook condition s warrant.

公开(公告)号：CA2322252A1

公开(公告)日：2001-04-08

申请号：CA2322252

申请日：2000-10-04

Applicant: LUCENT TECHNOLOGIES INC

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

IPC: H02J7/00 ,  H04M1/00 ,  H04M11/00 ,  H04M19/00 ,  H04M19/08 ,  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 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 firs t power rail or second power rail as line power conditions and on-hook/off-hook condition s warrant.