CA2128082A1 - Call Eavesdropping Arrangement - Google Patents

Call Eavesdropping Arrangement

Info

Publication number
CA2128082A1
CA2128082A1 CA2128082A CA2128082A CA2128082A1 CA 2128082 A1 CA2128082 A1 CA 2128082A1 CA 2128082 A CA2128082 A CA 2128082A CA 2128082 A CA2128082 A CA 2128082A CA 2128082 A1 CA2128082 A1 CA 2128082A1
Authority
CA
Canada
Prior art keywords
transmissions
adjunct processor
ports
terminal
recognition unit
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.)
Granted
Application number
CA2128082A
Other languages
French (fr)
Other versions
CA2128082C (en
Inventor
Robert Dean Reeder
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.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co Inc
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 American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Publication of CA2128082A1 publication Critical patent/CA2128082A1/en
Application granted granted Critical
Publication of CA2128082C publication Critical patent/CA2128082C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04M3/50—Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers ; Centralised arrangements for recording messages
    • H04M3/53—Centralised arrangements for recording incoming messages, i.e. mailbox systems
    • H04M3/533—Voice mail systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2281—Call monitoring, e.g. for law enforcement purposes; Call tracing; Detection or prevention of malicious calls
    • 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
    • H04M3/42314—Systems providing special services or facilities to subscribers in private branch exchanges
    • 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
    • H04M3/487—Arrangements for providing information services, e.g. recorded voice services or time announcements
    • H04M3/493—Interactive information services, e.g. directory enquiries ; Arrangements therefor, e.g. interactive voice response [IVR] systems or voice portals
    • 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
    • H04Q11/0407—Selecting arrangements for multiplex systems for time-division multiplexing using a stored programme control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
    • H04M2201/40—Electronic components, circuits, software, systems or apparatus used in telephone systems using speech recognition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/002—Applications of echo suppressors or cancellers in telephonic connections

Abstract

A switching system (10) is modified to provide, in addition to conventional connections (110 + 111) between ports (100, 103), eavesdropping connections that couple only one-half of a conventional bidirectional connectionbetween a pair of ports to a third port (102). If the pair of ports serves an adjunct processor such as a voice-mail system (11) and a user voice terminal (13), a voice- or speech-recognition unit (12) serving the adjunct processor may be connected to the third terminal to receive thereat only the transmissions (112) of the user voiceterminal without the unwanted transmissions of the adjunct processor. If the transmissions of the user voice terminal are polluted with echoes of the adjunctprocessor transmissions, then each half of the conventional connection between the adjunct processor and the user voice terminal may be connected to a different one of two ports (102, 103) serving the voice- or speech-recognition unit, whereby the recognition unit is able to receive the polluted transmissions (112) of the userterminal separately from the transmissions (113) of the adjunct processor and use the latter to perform echo cancelling functions on the former so as to obtain only the transmissions of the user voice terminal without the unwanted transmissions of the adjunct processor.
CA002128082A 1993-10-04 1994-07-14 Call eavesdropping arrangement Expired - Fee Related CA2128082C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/130,974 US5506901A (en) 1993-10-04 1993-10-04 Call eavesdropping arrangement
US130,974 1993-10-04

Publications (2)

Publication Number Publication Date
CA2128082A1 true CA2128082A1 (en) 1995-04-05
CA2128082C CA2128082C (en) 1997-12-30

Family

ID=22447287

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002128082A Expired - Fee Related CA2128082C (en) 1993-10-04 1994-07-14 Call eavesdropping arrangement

Country Status (6)

Country Link
US (1) US5506901A (en)
EP (1) EP0655851B1 (en)
JP (1) JP3123586B2 (en)
AU (1) AU674994B2 (en)
CA (1) CA2128082C (en)
DE (1) DE69434920T2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1177458C (en) 1996-09-23 2004-11-24 西门子公司 Device for indirect transmission of information on data and/or telecommunication networks
DE19955018A1 (en) * 1999-11-05 2001-06-21 Datakom Ges Fuer Datenkommunik Method and arrangement for location-independent monitoring of voice and / or data network connections by users
DE10128006A1 (en) * 2001-06-08 2002-12-12 Deutsche Telekom Ag Interconnecting 3 subscribers connected to data line network, especially telephone network or Internet, involves providing caller or addressee network identifier with trigger information
US7062019B2 (en) * 2001-07-27 2006-06-13 Avaya Technology Corp. Method of providing speech recognition for IVR and voice mail systems
US7885209B1 (en) 2007-04-03 2011-02-08 Avaya Inc. Alternatively enabling and disabling the talk paths of endpoints that share a virtual address
US8300632B2 (en) * 2008-02-21 2012-10-30 Avaya Inc. System and method for distributed call monitoring/recording using the session initiation protocol (SIP)

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2520925B2 (en) * 1975-05-10 1978-06-29 Elmeg-Elektro-Mechanik Gmbh, 3150 Peine Circuit arrangement for listening in on telephone calls
US4117278A (en) * 1977-09-19 1978-09-26 Bell Telephone Laboratories, Incorporated Service observing terminal
JPS6126357A (en) * 1984-07-17 1986-02-05 Nitsuko Ltd Telephone system with interrupting function
JPS61245756A (en) * 1985-04-24 1986-11-01 Nec Corp Speech recognition system for exchange system
US4914692A (en) * 1987-12-29 1990-04-03 At&T Bell Laboratories Automatic speech recognition using echo cancellation
US5199062A (en) * 1988-01-20 1993-03-30 Phone Base Systems Inc. Telephone communications system including a digital telephone switch, a voice response unit and a stored program sequence for controlling both the switch and the voice response unit
US4878240A (en) * 1988-01-25 1989-10-31 Bell Communications Research, Inc. Multi-service telephone switching system
JPH01296751A (en) * 1988-05-24 1989-11-30 Nec Corp Telephone number automatic guide system
US5054021A (en) * 1990-03-06 1991-10-01 Confertech International, Inc. Circuit for nulling the talker's speech in a conference call and method thereof
JPH03262246A (en) * 1990-03-13 1991-11-21 Matsushita Electric Ind Co Ltd Speech recorder
US5125024A (en) * 1990-03-28 1992-06-23 At&T Bell Laboratories Voice response unit
US5083308A (en) * 1990-03-30 1992-01-21 At&T Bell Laboratories Arrangement for determining switch port status at an adjunct processor
WO1992015166A1 (en) * 1991-02-21 1992-09-03 Vmx, Inc. Integrated application controlled call processing and messaging system
CA2116584C (en) * 1991-08-30 1999-01-19 Vijay R. Raman Adaptive echo canceller for voice messaging system
US5327489A (en) * 1991-12-16 1994-07-05 At&T Bell Laboratories Method and apparatus for monitoring a network for customer signaling during the term of a call

Also Published As

Publication number Publication date
EP0655851B1 (en) 2007-01-31
AU7429894A (en) 1995-04-13
US5506901A (en) 1996-04-09
DE69434920T2 (en) 2007-10-18
JP3123586B2 (en) 2001-01-15
AU674994B2 (en) 1997-01-16
CA2128082C (en) 1997-12-30
DE69434920D1 (en) 2007-03-22
EP0655851A1 (en) 1995-05-31
JPH07162527A (en) 1995-06-23

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20140715