JPS5797792A - Digital signal subscriber line and interface circuit - Google Patents

Digital signal subscriber line and interface circuit

Info

Publication number
JPS5797792A
JPS5797792A JP56163539A JP16353981A JPS5797792A JP S5797792 A JPS5797792 A JP S5797792A JP 56163539 A JP56163539 A JP 56163539A JP 16353981 A JP16353981 A JP 16353981A JP S5797792 A JPS5797792 A JP S5797792A
Authority
JP
Japan
Prior art keywords
digital signal
interface circuit
subscriber line
signal subscriber
line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56163539A
Other languages
English (en)
Inventor
Boreda Arubaato
Niiru Tomasu Terensu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of JPS5797792A publication Critical patent/JPS5797792A/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/068—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using time division multiplex techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
JP56163539A 1980-10-17 1981-10-15 Digital signal subscriber line and interface circuit Pending JPS5797792A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/197,939 US4450556A (en) 1980-10-17 1980-10-17 Digital signal subscriber loop and interface circuit

Publications (1)

Publication Number Publication Date
JPS5797792A true JPS5797792A (en) 1982-06-17

Family

ID=22731360

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56163539A Pending JPS5797792A (en) 1980-10-17 1981-10-15 Digital signal subscriber line and interface circuit

Country Status (4)

Country Link
US (1) US4450556A (ja)
EP (1) EP0050414A1 (ja)
JP (1) JPS5797792A (ja)
CA (1) CA1162278A (ja)

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US4432089A (en) * 1981-12-24 1984-02-14 Motorola, Inc. Digital loop transceiver for interfacing a digital PABX to a digital subscriber set via a subscriber line
EP0103324A3 (en) * 1982-09-10 1984-07-18 Motorola, Inc. Simultaneous voice and data transmission circuit having a digital loop transceiver
US4510596A (en) * 1982-10-12 1985-04-09 At&T Bell Labs Time slot assignment facilities
JPH0782414B2 (ja) * 1983-05-24 1995-09-06 日本電気株式会社 情報処理装置
US4607364A (en) * 1983-11-08 1986-08-19 Jeffrey Neumann Multimode data communication system
GB8430003D0 (en) * 1984-11-28 1985-01-09 Plessey Co Plc Subscriber line interface modem
US4730311A (en) * 1985-03-12 1988-03-08 Pacific Bell Remote multiplexer for digital telephone system
US5046067A (en) * 1988-10-24 1991-09-03 Reliance Comm/Tec Corporation Digital transmission system
US4788682A (en) * 1986-09-23 1988-11-29 Northern Telecom Limited Telephone system adapted to telemarketing
US5010480A (en) * 1987-07-21 1991-04-23 Dsp Technology Communication interface for interfacing a data bus of a computer to a high speed bipolar communication system
US5193087A (en) * 1990-05-16 1993-03-09 Tadiran, Ltd. Electronic digital cross-connect system having bipolar violation transparency
US5848149A (en) * 1995-05-26 1998-12-08 Lucent Technologies Inc. Subscriber line interface and power circuit
US5841771A (en) * 1995-07-07 1998-11-24 Northern Telecom Limited Telecommunications switch apparatus and method for time switching
US6169801B1 (en) * 1998-03-16 2001-01-02 Midcom, Inc. Digital isolation apparatus and method
US6028867A (en) * 1998-06-15 2000-02-22 Covad Communications Group, Inc. System, method, and network for providing high speed remote access from any location connected by a local loop to a central office
US6853647B1 (en) 1999-02-17 2005-02-08 Covad Communications Group, Inc. System method and network for providing high speed remote access from any location connected by a local loop to a central office
US6553518B1 (en) 1999-03-08 2003-04-22 International Business Machines Corporation Severe error detectors, methods and computer program products that use constellation specific error event thresholds to detect severe error events during demodulation of a signal comprising symbols from a plurality of symbol constellations
US6389064B1 (en) 1999-03-08 2002-05-14 International Business Machines Corporation Modems, methods, and computer program products for identifying a signaling alphabet in variance with an ideal alphabet due to digital impairments
US6661837B1 (en) 1999-03-08 2003-12-09 International Business Machines Corporation Modems, methods, and computer program products for selecting an optimum data rate using error signals representing the difference between the output of an equalizer and the output of a slicer or detector
US6381267B1 (en) 1999-03-08 2002-04-30 International Business Machines Corporation Modems, methods, and computer program products for falling back to a lower data rate protocol upon detecting abnormal line conditions during startup
US7003030B2 (en) 1999-03-08 2006-02-21 Lenovo (Singapore) Pte. Ltd. Receivers, methods, and computer program products for an analog modem that receives data signals from a digital modem
US6341360B1 (en) 1999-03-08 2002-01-22 International Business Machines Corporation Decision feedback equalizers, methods, and computer program products for detecting severe error events and preserving equalizer filter characteristics in response thereto
US6487243B1 (en) 1999-03-08 2002-11-26 International Business Machines Corporation Modems, methods, and computer program products for recovering from errors in a tone reversal sequence between two modems
US6661847B1 (en) 1999-05-20 2003-12-09 International Business Machines Corporation Systems methods and computer program products for generating and optimizing signal constellations
US6662322B1 (en) 1999-10-29 2003-12-09 International Business Machines Corporation Systems, methods, and computer program products for controlling the error rate in a communication device by adjusting the distance between signal constellation points
US6967995B1 (en) 1999-10-29 2005-11-22 International Business Machines Corporation Methods, systems and computer program products for carrier drop detection using a variable threshold
US6823004B1 (en) 1999-10-29 2004-11-23 International Business Machines Corporation Methods, systems and computer program products for monitoring performance of a modem during a connection
US6611563B1 (en) 1999-10-29 2003-08-26 International Business Machines Corporation Systems, methods and computer program products for data mode refinement of modem constellation points
US6505222B1 (en) 1999-10-29 2003-01-07 International Business Machines Corporation Systems methods and computer program products for controlling undesirable bias in an equalizer
US6650657B1 (en) 1999-10-29 2003-11-18 International Business Machines Corporation Systems, methods and computer program products for identifying digital impairments in modem signals
US6792040B1 (en) 1999-10-29 2004-09-14 International Business Machines Corporation Modems having a dual power mode capability and methods of operating same
US6765955B1 (en) 1999-10-29 2004-07-20 International Business Machines Corporation Methods, systems and computer program products establishing a communication configuration for a modem connection to compensate for echo noise
US6826157B1 (en) 1999-10-29 2004-11-30 International Business Machines Corporation Systems, methods, and computer program products for controlling data rate reductions in a communication device by using a plurality of filters to detect short-term bursts of errors and long-term sustainable errors
US6754258B1 (en) 1999-10-29 2004-06-22 International Business Machines Corporation Systems, methods and computer program products for averaging learned levels in the presence of digital impairments based on patterns
US6816545B1 (en) 1999-10-29 2004-11-09 International Business Machines Corporation Systems, methods and computer program products for identifying digital impairments in modems based on clusters and/or skips in pulse code modulation signal levels
US6823017B1 (en) 1999-10-29 2004-11-23 International Business Machines Corporation Systems, methods and computer program products for filtering glitches from measured values in a sequence of code points
US6839382B1 (en) 1999-10-29 2005-01-04 International Business Machines Corporation System, methods and computer program products for identifying digital impairments in modem signals using signature analysis and signal level comparison analysis
US6792004B1 (en) 1999-10-29 2004-09-14 International Business Machines Corporation Systems, methods and computer program products for averaging learned levels in the presence of robbed-bit signaling based on proximity
US8108429B2 (en) * 2004-05-07 2012-01-31 Quest Software, Inc. System for moving real-time data events across a plurality of devices in a network for simultaneous data protection, replication, and access services
US7565661B2 (en) 2004-05-10 2009-07-21 Siew Yong Sim-Tang Method and system for real-time event journaling to provide enterprise data services
US7680834B1 (en) * 2004-06-08 2010-03-16 Bakbone Software, Inc. Method and system for no downtime resychronization for real-time, continuous data protection
US7979404B2 (en) 2004-09-17 2011-07-12 Quest Software, Inc. Extracting data changes and storing data history to allow for instantaneous access to and reconstruction of any point-in-time data
US7904913B2 (en) * 2004-11-02 2011-03-08 Bakbone Software, Inc. Management interface for a system that provides automated, real-time, continuous data protection
US7689602B1 (en) 2005-07-20 2010-03-30 Bakbone Software, Inc. Method of creating hierarchical indices for a distributed object system
US7788521B1 (en) 2005-07-20 2010-08-31 Bakbone Software, Inc. Method and system for virtual on-demand recovery for real-time, continuous data protection
US8131723B2 (en) 2007-03-30 2012-03-06 Quest Software, Inc. Recovering a file system to any point-in-time in the past with guaranteed structure, content consistency and integrity
US8364648B1 (en) 2007-04-09 2013-01-29 Quest Software, Inc. Recovering a database to any point-in-time in the past with guaranteed data consistency

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Publication number Priority date Publication date Assignee Title
GB1444804A (en) * 1973-07-05 1976-08-04 Standard Telephones Cables Ltd Telecommunication systems
FR2281686A1 (fr) * 1974-08-05 1976-03-05 France Etat Reseau de transmission numerique a phases de trames emises independantes
US4079188A (en) * 1975-04-14 1978-03-14 Datotek, Inc. Multi-mode digital enciphering system
FR2329108A1 (fr) * 1975-10-20 1977-05-20 Cit Alcatel Dispositif de traitement d'un train numerique
FR2359563A1 (fr) * 1976-07-22 1978-02-17 Lannionnais Electronique Central de telecommunication temporel
GB1555394A (en) * 1978-04-04 1979-11-07 Standard Telephones Cables Ltd Digital signalling especially in an automatic telecommunication system
US4201893A (en) * 1978-09-28 1980-05-06 Gte Automatic Electric Laboratories Incorporated Private automatic branch exchange telephone system with two data sources sharing a multiplexed data bus
FR2451141A1 (fr) * 1979-03-08 1980-10-03 Cit Alcatel Autocommutateur a reseau de connexion numerique
US4312063A (en) * 1979-09-27 1982-01-19 Communications Satellite Corporation TDM Data reorganization apparatus

Also Published As

Publication number Publication date
EP0050414A1 (en) 1982-04-28
US4450556A (en) 1984-05-22
CA1162278A (en) 1984-02-14

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