DE69228552T2 - Schaltung zur Detektion eines Parallelfernsprechgerät - Google Patents

Schaltung zur Detektion eines Parallelfernsprechgerät

Info

Publication number
DE69228552T2
DE69228552T2 DE69228552T DE69228552T DE69228552T2 DE 69228552 T2 DE69228552 T2 DE 69228552T2 DE 69228552 T DE69228552 T DE 69228552T DE 69228552 T DE69228552 T DE 69228552T DE 69228552 T2 DE69228552 T2 DE 69228552T2
Authority
DE
Germany
Prior art keywords
detection
circuit
parallel telephone
telephone
parallel
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 - Fee Related
Application number
DE69228552T
Other languages
English (en)
Other versions
DE69228552D1 (de
Inventor
Sung Jin Jo
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.)
STMicroelectronics Asia Pacific Pte Ltd
STMicroelectronics Pte Ltd
Original Assignee
STMicroelectronics Asia Pacific Pte Ltd
STMicroelectronics Pte 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 STMicroelectronics Asia Pacific Pte Ltd, STMicroelectronics Pte Ltd filed Critical STMicroelectronics Asia Pacific Pte Ltd
Publication of DE69228552D1 publication Critical patent/DE69228552D1/de
Application granted granted Critical
Publication of DE69228552T2 publication Critical patent/DE69228552T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/80—Telephone line holding circuits
    • 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
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/428—Arrangements for placing incoming calls on hold
    • H04M3/4283—Call holding circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephonic Communication Services (AREA)
DE69228552T 1992-12-21 1992-12-21 Schaltung zur Detektion eines Parallelfernsprechgerät Expired - Fee Related DE69228552T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92311665A EP0603436B1 (de) 1992-12-21 1992-12-21 Schaltung zur Detektion eines Parallelfernsprechgerät

Publications (2)

Publication Number Publication Date
DE69228552D1 DE69228552D1 (de) 1999-04-08
DE69228552T2 true DE69228552T2 (de) 1999-06-17

Family

ID=8211585

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69228552T Expired - Fee Related DE69228552T2 (de) 1992-12-21 1992-12-21 Schaltung zur Detektion eines Parallelfernsprechgerät

Country Status (3)

Country Link
US (1) US5394465A (de)
EP (1) EP0603436B1 (de)
DE (1) DE69228552T2 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5546442A (en) * 1994-06-23 1996-08-13 At&T Corp. Method and apparatus for use in completing telephone calls
KR0143315B1 (ko) * 1995-07-04 1998-08-01 김광호 무선전화기에서 병렬 연결된 전화기의 사용유무 판단회로 및 방법
EP0868810B1 (de) * 1995-12-22 2006-09-06 Thomson Multimedia Inc. Automatisches teilnehmerrückrufsystem
US5768355A (en) * 1996-05-16 1998-06-16 Science Dynamics Corporation Three-way call detection system
JP3728910B2 (ja) * 1998-02-13 2005-12-21 松下電器産業株式会社 電話装置
DE19942691A1 (de) * 1999-09-07 2001-03-15 Siemens Ag Schaltungsanordnung zur Erkennung von Verbindungswünschen an einer analogen Teilnehmerleitung
US7899167B1 (en) 2003-08-15 2011-03-01 Securus Technologies, Inc. Centralized call processing
US8000269B1 (en) 2001-07-13 2011-08-16 Securus Technologies, Inc. Call processing with voice over internet protocol transmission
US7860222B1 (en) 2003-11-24 2010-12-28 Securus Technologies, Inc. Systems and methods for acquiring, accessing, and analyzing investigative information
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
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
US7529357B1 (en) 2003-08-15 2009-05-05 Evercom Systems, Inc. Inmate management and call processing systems and methods
US10796392B1 (en) 2007-05-22 2020-10-06 Securus Technologies, Llc Systems and methods for facilitating booking, bonding and release

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2974282A (en) * 1954-06-18 1961-03-07 Ericsson Telefon Ab L M Device for representing a voltage in the shape of a code
USRE31643E (en) * 1978-09-19 1984-08-07 Hold circuit for telephone system
US4387274A (en) * 1981-06-15 1983-06-07 Gti Corporation Hook flash signal actuated telephone control device
US4529843A (en) * 1983-08-25 1985-07-16 Gte Business Communication Systems Inc. Subscribers telephone hold circuit with automatic disconnect
JPS61152153A (ja) * 1984-12-26 1986-07-10 Hitachi Ltd 送受信切替方式
JPS6363247A (ja) * 1986-09-03 1988-03-19 Nec Corp 保留機能付電話機
US5095504A (en) * 1987-10-01 1992-03-10 Canon Kabushiki Kaisha Telephone and telephone system having temporary transfer and hold-release functions

Also Published As

Publication number Publication date
DE69228552D1 (de) 1999-04-08
EP0603436B1 (de) 1999-03-03
US5394465A (en) 1995-02-28
EP0603436A1 (de) 1994-06-29

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee