DK149681A - PROCEDURE FOR ELIMINATING ECONOMICS IN A TWO-LINE DUPLEX DATA TRANSMISSION CHANNEL - Google Patents

PROCEDURE FOR ELIMINATING ECONOMICS IN A TWO-LINE DUPLEX DATA TRANSMISSION CHANNEL

Info

Publication number: DK149681A
Authority: DK; Denmark
Prior art keywords: economics; eliminating; procedure; data transmission; transmission channel
Prior art date: 1980-04-09

Application number

DK149681A

Other languages

Danish (da)

Inventor

D D Falconer

Original Assignee

Western Electric Co

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.)

1980-04-09

Filing date

1981-04-02

Publication date

1981-10-10

1981-04-02 Application filed by Western Electric Co filed Critical Western Electric Co

1981-10-10 Publication of DK149681A publication Critical patent/DK149681A/en

Links

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
- H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Bidirectional Digital Transmission (AREA)

DK149681A 1980-04-09 1981-04-02 PROCEDURE FOR ELIMINATING ECONOMICS IN A TWO-LINE DUPLEX DATA TRANSMISSION CHANNEL DK149681A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US13866380A	1980-04-09	1980-04-09

Publications (1)

Publication Number	Publication Date
DK149681A true DK149681A (en)	1981-10-10

Family

ID=22483068

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DK149681A DK149681A (en)	1980-04-09	1981-04-02	PROCEDURE FOR ELIMINATING ECONOMICS IN A TWO-LINE DUPLEX DATA TRANSMISSION CHANNEL

Country Status (13)

Country	Link
JP (1)	JPS56157152A (en)
AU (1)	AU540883B2 (en)
CA (1)	CA1175521A (en)
CH (1)	CH651980A5 (en)
DE (1)	DE3113394C2 (en)
DK (1)	DK149681A (en)
ES (1)	ES501182A0 (en)
FR (1)	FR2480534B1 (en)
GB (1)	GB2075313B (en)
IL (1)	IL62600A (en)
IT (1)	IT1137680B (en)
NL (1)	NL8101741A (en)
SE (1)	SE447437B (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2534427A1 (en) *	1982-10-11	1984-04-13	Trt Telecom Radio Electr	ECHO CANCER FOR DATA SIGNAL IN BASE STRIP
US4894820A (en) *	1987-03-24	1990-01-16	Oki Electric Industry Co., Ltd.	Double-talk detection in an echo canceller
DE68924261T2 (en) *	1989-06-22	1996-03-21	Ibm	Echo cancellation device with adaptation of the echo cancellation coefficients during full duplex transmission.
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
US7813497B2 (en)	2004-01-29	2010-10-12	St-Ericsson Sa	Echo canceller with interference-level controlled step size
US8542802B2 (en)	2007-02-15	2013-09-24	Global Tel*Link Corporation	System and method for three-way call detection
US20080201158A1 (en)	2007-02-15	2008-08-21	Johnson Mark D	System and method for visitation management in a controlled-access environment
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 (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3499999A (en) *	1966-10-31	1970-03-10	Bell Telephone Labor Inc	Closed loop adaptive echo canceller using generalized filter networks
US4087654A (en) *	1975-11-28	1978-05-02	Bell Telephone Laboratories, Incorporated	Echo canceller for two-wire full duplex data transmission
US4074086A (en) *	1976-09-07	1978-02-14	Bell Telephone Laboratories, Incorporated	Joint adaptive echo canceller and equalizer for two-wire full-duplex data transmission
SE416367B (en) *	1976-09-07	1980-12-15	Western Electric Co	EKOELIMINERINGSANORDNING
JPS5582551A (en) *	1978-12-15	1980-06-21	Nec Corp	Echo cancel unit for two line type duplex data communication modem

1981
- 1981-03-17 CA CA000373185A patent/CA1175521A/en not_active Expired
- 1981-03-25 AU AU68722/81A patent/AU540883B2/en not_active Ceased
- 1981-03-31 SE SE8102048A patent/SE447437B/en not_active IP Right Cessation
- 1981-04-02 DK DK149681A patent/DK149681A/en not_active IP Right Cessation
- 1981-04-03 DE DE3113394A patent/DE3113394C2/en not_active Expired
- 1981-04-06 GB GB8110703A patent/GB2075313B/en not_active Expired
- 1981-04-07 IL IL62600A patent/IL62600A/en unknown
- 1981-04-07 FR FR8106951A patent/FR2480534B1/en not_active Expired
- 1981-04-08 ES ES501182A patent/ES501182A0/en active Granted
- 1981-04-08 NL NL8101741A patent/NL8101741A/en not_active Application Discontinuation
- 1981-04-08 CH CH2375/81A patent/CH651980A5/en not_active IP Right Cessation
- 1981-04-08 IT IT20998/81A patent/IT1137680B/en active
- 1981-04-09 JP JP5377381A patent/JPS56157152A/en active Pending

Also Published As

Publication number	Publication date
FR2480534A1 (en)	1981-10-16
DE3113394A1 (en)	1982-05-06
GB2075313A (en)	1981-11-11
SE8102048L (en)	1981-10-10
AU6872281A (en)	1981-10-15
GB2075313B (en)	1984-05-02
JPS56157152A (en)	1981-12-04
AU540883B2 (en)	1984-12-06
IT8120998A0 (en)	1981-04-08
CH651980A5 (en)	1985-10-15
ES8205088A1 (en)	1982-06-16
IL62600A (en)	1983-11-30
DE3113394C2 (en)	1985-11-21
IL62600A0 (en)	1981-06-29
NL8101741A (en)	1981-11-02
CA1175521A (en)	1984-10-02
ES501182A0 (en)	1982-06-16
IT8120998A1 (en)	1982-10-08
SE447437B (en)	1986-11-10
FR2480534B1 (en)	1985-05-31
IT1137680B (en)	1986-09-10

Legal Events

Date	Code	Title	Description
1988-12-19	AHB	Application shelved due to non-payment
1994-02-28	PBP	Patent lapsed

Publication	Publication Date	Title
JPS57113176A (en)	1982-07-14	Conversation type data searching device
DK149681A (en)	1981-10-10	PROCEDURE FOR ELIMINATING ECONOMICS IN A TWO-LINE DUPLEX DATA TRANSMISSION CHANNEL
DK321481A (en)	1982-01-19	PROCEDURE FOR ERROR-CORRECTING DATA
DK441381A (en)	1982-05-14	COMMUNICATION CHANNEL
DK582084D0 (en)	1984-12-06	PROCEDURES FOR DUPLEX VOICE TRANSMISSION
DK226181A (en)	1981-12-03	TELEPHONE SLOT
DE3162160D1 (en)	1984-03-15	Coupling element for optical wave guides
JPS56122549A (en)	1981-09-26	Data communication device
NO812602L (en)	1982-02-01	CONNECTOR DEVICE FOR Ladders.
GB2076202B (en)	1984-03-28	Voice data output apparatus
MX150803A (en)	1984-07-19	IMPROVEMENTS IN LINE PROTECTOR FOR A COMMUNICATION CIRCUIT
DK354281A (en)	1982-02-13	PROCEDURES FOR RE-INCORPORATING COCKA ARAMA
AT367233B (en)	1982-06-11	TAPE GUIDE
GB2019557B (en)	1983-01-12	Bidirectional optical data transmission
DE3175059D1 (en)	1986-09-11	Data input device
GB2075734B (en)	1984-04-04	Voice data output apparatus
GB2075735B (en)	1984-03-28	Voice data output apparatus
DK295381A (en)	1982-01-04	DATA TRANSMISSION SYSTEM
GB2082032B (en)	1983-10-26	Line guide
DK433182A (en)	1982-09-29	DATA COMMUNICATIONS
FR2486912B1 (en)	1994-08-12	IMPROVEMENTS ON CARTON TELESCOPES
IT8022637V0 (en)	1980-08-28	MANUAL TELEPHONE DEVICE.
GB2076271B (en)	1983-04-07	Line guide
JPS5763599A (en)	1982-04-17	Voice input device
JPS56146200A (en)	1981-11-13	Voice input device