JP2725218B2 - 分散型電話会議制御装置 - Google Patents

分散型電話会議制御装置

Info

Publication number
JP2725218B2
JP2725218B2 JP2413110A JP41311090A JP2725218B2 JP 2725218 B2 JP2725218 B2 JP 2725218B2 JP 2413110 A JP2413110 A JP 2413110A JP 41311090 A JP41311090 A JP 41311090A JP 2725218 B2 JP2725218 B2 JP 2725218B2
Authority
JP
Japan
Prior art keywords
line
lines
conference
signal
external
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 - Lifetime
Application number
JP2413110A
Other languages
English (en)
Japanese (ja)
Other versions
JPH04222148A (ja
Inventor
三百次 津村
正人 秦
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.)
AI KYATSUTO KK
RIKOSU KK
Original Assignee
AI KYATSUTO KK
RIKOSU KK
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 AI KYATSUTO KK, RIKOSU KK filed Critical AI KYATSUTO KK
Priority to JP2413110A priority Critical patent/JP2725218B2/ja
Priority to US07/714,198 priority patent/US5291548A/en
Priority to EP91113411A priority patent/EP0492049B1/en
Priority to DE69124217T priority patent/DE69124217T2/de
Publication of JPH04222148A publication Critical patent/JPH04222148A/ja
Application granted granted Critical
Publication of JP2725218B2 publication Critical patent/JP2725218B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • H04M3/562—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities where the conference facilities are distributed
    • 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
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
JP2413110A 1990-12-21 1990-12-21 分散型電話会議制御装置 Expired - Lifetime JP2725218B2 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2413110A JP2725218B2 (ja) 1990-12-21 1990-12-21 分散型電話会議制御装置
US07/714,198 US5291548A (en) 1990-12-21 1991-06-12 Distributed telephone conference control device
EP91113411A EP0492049B1 (en) 1990-12-21 1991-08-09 Distributed telephone conference control device
DE69124217T DE69124217T2 (de) 1990-12-21 1991-08-09 Verteilte Telefonkonferenz-Kontrolleinrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2413110A JP2725218B2 (ja) 1990-12-21 1990-12-21 分散型電話会議制御装置

Publications (2)

Publication Number Publication Date
JPH04222148A JPH04222148A (ja) 1992-08-12
JP2725218B2 true JP2725218B2 (ja) 1998-03-11

Family

ID=18521808

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2413110A Expired - Lifetime JP2725218B2 (ja) 1990-12-21 1990-12-21 分散型電話会議制御装置

Country Status (4)

Country Link
US (1) US5291548A (enExample)
EP (1) EP0492049B1 (enExample)
JP (1) JP2725218B2 (enExample)
DE (1) DE69124217T2 (enExample)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5463684A (en) * 1993-11-03 1995-10-31 Microlog Corporation Telecommunications system for transferring calls without a private branch exchange
US5719928A (en) * 1995-05-12 1998-02-17 Protel, Inc. Apparatus and method for automated audio teleconferencing having enhanced billing and reservation features
WO1996036157A1 (en) * 1995-05-12 1996-11-14 Protel, Inc. Automated audio teleconferencing having reconfiguration features
US5828743A (en) * 1995-05-12 1998-10-27 Protel, Inc. Apparatus and method for automated audio teleconferencing having enhanced access and security features
SE9502687D0 (sv) * 1995-07-24 1995-07-24 Sandvik Ab CVD coated titanium based carbonitride cutting tool insert
ES2131029B1 (es) * 1997-11-27 2000-03-01 Garcia Jon Urresti Sistema de monitorizacion remota de lineas telefonicas.
US6895086B2 (en) * 2001-11-13 2005-05-17 Inmate Telephone, Inc. 3-Way call detection system and method
CA2534767A1 (en) * 2003-08-05 2005-03-17 Inmate Telephone, Inc. Three-way call detection using steganography
US7760865B2 (en) * 2006-11-17 2010-07-20 Microsoft Corporation Escalation from a conversation to a conference
US20080201158A1 (en) 2007-02-15 2008-08-21 Johnson Mark D System and method for visitation management in a controlled-access environment
US8542802B2 (en) 2007-02-15 2013-09-24 Global Tel*Link Corporation System and method for three-way call detection
US9225838B2 (en) 2009-02-12 2015-12-29 Value-Added Communications, Inc. System and method for detecting three-way call circumvention attempts
US8630726B2 (en) * 2009-02-12 2014-01-14 Value-Added Communications, Inc. System and method for detecting three-way call circumvention attempts
US10572961B2 (en) 2016-03-15 2020-02-25 Global Tel*Link Corporation Detection and prevention of inmate to inmate message relay
US9609121B1 (en) 2016-04-07 2017-03-28 Global Tel*Link Corporation System and method for third party monitoring of voice and video calls
US10027797B1 (en) 2017-05-10 2018-07-17 Global Tel*Link Corporation Alarm control for inmate call monitoring
US10225396B2 (en) 2017-05-18 2019-03-05 Global Tel*Link Corporation Third party monitoring of a activity within a monitoring platform
US10860786B2 (en) 2017-06-01 2020-12-08 Global Tel*Link Corporation System and method for analyzing and investigating communication data from a controlled environment
US9930088B1 (en) 2017-06-22 2018-03-27 Global Tel*Link Corporation Utilizing VoIP codec negotiation during a controlled environment call

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4475189A (en) * 1982-05-27 1984-10-02 At&T Bell Laboratories Automatic interactive conference arrangement
US4479195A (en) * 1982-09-07 1984-10-23 At&T Bell Laboratories Data conference system
JPS6019348A (ja) * 1983-07-13 1985-01-31 Toshiba Corp ボタン電話装置における会議形成方式
US4535454A (en) * 1983-09-15 1985-08-13 At&T Information Systems Inc. Multifrequency tone distribution using a conferencing arrangement
US4757496A (en) * 1984-07-09 1988-07-12 Bard Technologies Distributed telephone system
DE3706128C1 (de) * 1987-02-23 1988-08-18 Deutsche Telephonwerk Kabel Verfahren fuer Konferenzverbindungen in rechnergesteuerten digitalen Fernsprechvermittlungsanlagen
US5113431A (en) * 1989-10-31 1992-05-12 At&T Bell Laboratories Distributed control teleconferencing voice bridge

Also Published As

Publication number Publication date
EP0492049A3 (enExample) 1994-02-23
EP0492049B1 (en) 1997-01-15
DE69124217T2 (de) 1997-04-30
US5291548A (en) 1994-03-01
DE69124217D1 (de) 1997-02-27
JPH04222148A (ja) 1992-08-12
EP0492049A2 (en) 1992-07-01

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