DE3574440D1 - A call progress monitor for a computer telephone interface - Google Patents

A call progress monitor for a computer telephone interface

Info

Publication number
DE3574440D1
DE3574440D1 DE8585115704T DE3574440T DE3574440D1 DE 3574440 D1 DE3574440 D1 DE 3574440D1 DE 8585115704 T DE8585115704 T DE 8585115704T DE 3574440 T DE3574440 T DE 3574440T DE 3574440 D1 DE3574440 D1 DE 3574440D1
Authority
DE
Germany
Prior art keywords
telephone interface
call progress
computer telephone
progress monitor
monitor
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.)
Expired
Application number
DE8585115704T
Other languages
English (en)
Inventor
Bruce James Wilki
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of DE3574440D1 publication Critical patent/DE3574440D1/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/82—Line monitoring circuits for call progress or status discrimination
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
DE8585115704T 1984-12-21 1985-12-10 A call progress monitor for a computer telephone interface Expired DE3574440D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/684,826 US4686699A (en) 1984-12-21 1984-12-21 Call progress monitor for a computer telephone interface

Publications (1)

Publication Number Publication Date
DE3574440D1 true DE3574440D1 (en) 1989-12-28

Family

ID=24749743

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8585115704T Expired DE3574440D1 (en) 1984-12-21 1985-12-10 A call progress monitor for a computer telephone interface

Country Status (5)

Country Link
US (1) US4686699A (de)
EP (1) EP0185295B1 (de)
JP (1) JPS61152156A (de)
CA (1) CA1227586A (de)
DE (1) DE3574440D1 (de)

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US5796811A (en) * 1995-11-15 1998-08-18 Gateway Technologies, Inc. Three way call detection
US5850436A (en) * 1996-08-23 1998-12-15 Compaq Computer Corporation Communication between a telephone and a computer system
US5949853A (en) * 1997-02-28 1999-09-07 International Business Machines Corporation Extension device for a computer system
US6430229B1 (en) 1997-04-22 2002-08-06 Silicon Laboratories Inc. Capacitive isolation system with digital communication and power transfer
US6498825B1 (en) * 1997-04-22 2002-12-24 Silicon Laboratories Inc. Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with programmable current limiting
US6289070B1 (en) 1997-04-22 2001-09-11 Silicon Laboratories, Inc. Digital isolation system with ADC offset calibration including coarse offset
US6456712B1 (en) 1997-04-22 2002-09-24 Silicon Laboratories Inc. Separation of ring detection functions across isolation barrier for minimum power
US6389134B1 (en) * 1997-04-22 2002-05-14 Silicon Laboratories, Inc. Call progress monitor circuitry and method for a communication system
US6504864B1 (en) 1997-04-22 2003-01-07 Silicon Laboratories Inc. Digital access arrangement circuitry and method for connecting to phone lines having a second order DC holding circuit
US6587560B1 (en) * 1997-04-22 2003-07-01 Silicon Laboratories Inc. Low voltage circuits powered by the phone line
US6408034B1 (en) 1997-04-22 2002-06-18 Silicon Laboratories, Inc. Framed delta sigma data with unlikely delta sigma data patterns
US6167134A (en) * 1997-04-22 2000-12-26 Silicon Laboratories, Inc. External resistor and method to minimize power dissipation in DC holding circuitry for a communication system
US6516024B1 (en) 1997-04-22 2003-02-04 Silicon Laboratories Inc. Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with low distortion and current limiting
US6385235B1 (en) * 1997-04-22 2002-05-07 Silicon Laboratories, Inc. Direct digital access arrangement circuitry and method for connecting to phone lines
US6144326A (en) 1997-04-22 2000-11-07 Silicon Laboratories, Inc. Digital isolation system with ADC offset calibration
US6480602B1 (en) 1997-04-22 2002-11-12 Silicon Laboratories, Inc. Ring-detect interface circuitry and method for a communication system
US6137827A (en) 1997-04-22 2000-10-24 Silicon Laboratories, Inc. Isolation system with digital communication across a capacitive barrier
US6339048B1 (en) * 1999-12-23 2002-01-15 Elementis Specialties, Inc. Oil and oil invert emulsion drilling fluids with improved anti-settling properties
US6359983B1 (en) 1997-04-22 2002-03-19 Silicon Laboratories, Inc. Digital isolation system with data scrambling
US6442271B1 (en) 1997-04-22 2002-08-27 Silicon Laboratories, Inc. Digital isolation system with low power mode
US6442213B1 (en) * 1997-04-22 2002-08-27 Silicon Laboratories Inc. Digital isolation system with hybrid circuit in ADC calibration loop
US5870046A (en) 1997-04-22 1999-02-09 Silicon Laboratories Inc. Analog isolation system with digital communication across a capacitive barrier
US6321194B1 (en) 1999-04-27 2001-11-20 Brooktrout Technology, Inc. Voice detection in audio signals
US8000269B1 (en) 2001-07-13 2011-08-16 Securus Technologies, Inc. Call processing with voice over internet protocol transmission
US7505406B1 (en) 2001-07-13 2009-03-17 Evercom Systems, Inc. Public telephone control with voice over internet protocol transmission
US7899167B1 (en) 2003-08-15 2011-03-01 Securus Technologies, Inc. Centralized call processing
US6687344B1 (en) * 2001-09-07 2004-02-03 Pctel,Inx. Parallel handset on-hook/off-hook detection by software-based signal power measurement
US9026468B2 (en) 2002-04-29 2015-05-05 Securus Technologies, Inc. System and method for proactively establishing a third-party payment account for services rendered to a resident of a controlled-environment facility
US9020114B2 (en) 2002-04-29 2015-04-28 Securus Technologies, Inc. Systems and methods for detecting a call anomaly using biometric identification
US7916845B2 (en) 2006-04-13 2011-03-29 Securus Technologies, Inc. Unauthorized call activity detection and prevention systems and methods for a Voice over Internet Protocol environment
US7860222B1 (en) 2003-11-24 2010-12-28 Securus Technologies, Inc. Systems and methods for acquiring, accessing, and analyzing investigative information
US7529357B1 (en) 2003-08-15 2009-05-05 Evercom Systems, Inc. Inmate management and call processing systems and methods
CN100456782C (zh) 2003-12-16 2009-01-28 腾讯科技（深圳）有限公司 一种电话状态信息呈现系统及其实现方法
US10796392B1 (en) 2007-05-22 2020-10-06 Securus Technologies, Llc Systems and methods for facilitating booking, bonding and release
US8135114B2 (en) * 2007-08-06 2012-03-13 Mspot, Inc. Method and apparatus for creating an answer tone for a computing device with phone capabilities or a telephone
US8737597B2 (en) 2009-01-27 2014-05-27 Cisco Technology, Inc. Call progress analysis on the edge of a VoIP network

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US4028493A (en) * 1975-12-22 1977-06-07 International Business Machines Corporation Call progress signal detector
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FR2471699A1 (fr) * 1979-12-12 1981-06-19 Trt Telecom Radio Electr Dispositif de filtrage comportant des reseaux integrateurs a commutation de capacites
DE3002041C2 (de) * 1980-01-21 1983-11-10 Siemens AG, 1000 Berlin und 8000 München Elektrische Filterschaltung unter Verwendung von wenigstens einer simulierten Induktivität, die gesteuerte Schalter, Kondensatoren und Verstärker enthält
JPS57103465A (en) * 1980-12-17 1982-06-28 Nec Corp Audible signal detecting circuit
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Also Published As

Publication number Publication date
CA1227586A (en) 1987-09-29
EP0185295A2 (de) 1986-06-25
JPS61152156A (ja) 1986-07-10
EP0185295B1 (de) 1989-11-23
EP0185295A3 (en) 1988-05-04
JPH0232828B2 (de) 1990-07-24
US4686699A (en) 1987-08-11

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition