SE7909903L - Detektor for flerfrekvenssignaler - Google Patents

Detektor for flerfrekvenssignaler

Info

Publication number: SE7909903L
Authority: SE; Sweden
Prior art keywords: filters; signals; threshold level; multifrequency; tones
Prior art date: 1978-12-07

Application number

SE7909903A

Other languages

Unknown language ( )

English (en)

Other versions

SE437101B (sv

Inventor

R L Hanson

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.)

1978-12-07

Filing date

1979-11-30

Publication date

1980-06-08

1979-11-30 Application filed by Western Electric Co filed Critical Western Electric Co

1980-06-08 Publication of SE7909903L publication Critical patent/SE7909903L/sv

1985-02-04 Publication of SE437101B publication Critical patent/SE437101B/sv

Classifications

- 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
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Telephone Function (AREA)
Interface Circuits In Exchanges (AREA)

SE7909903A 1978-12-07 1979-11-30 Anordning for detektering av flerfrekvenssignaler i en insignal SE437101B (sv)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US05/967,272 US4227055A (en)	1978-12-07	1978-12-07	Multifrequency receiver

Publications (2)

Publication Number	Publication Date
SE7909903L true SE7909903L (sv)	1980-06-08
SE437101B SE437101B (sv)	1985-02-04

Family

ID=25512549

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
SE7909903A SE437101B (sv)	1978-12-07	1979-11-30	Anordning for detektering av flerfrekvenssignaler i en insignal

Country Status (14)

Country	Link
US (1)	US4227055A (sv)
JP (1)	JPH0763191B2 (sv)
AU (1)	AU533928B2 (sv)
BE (1)	BE880466A (sv)
CA (1)	CA1142280A (sv)
CH (1)	CH647905A5 (sv)
DE (1)	DE2948676C2 (sv)
ES (1)	ES486655A1 (sv)
FR (1)	FR2443783B1 (sv)
GB (1)	GB2035757B (sv)
IL (1)	IL58853A (sv)
IT (1)	IT1119597B (sv)
NL (1)	NL190463C (sv)
SE (1)	SE437101B (sv)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4385208A (en) *	1981-04-15	1983-05-24	Bell Telephone Laboratories, Incorporated	Multifrequency receiver
JPS58173948U (ja) *	1982-05-18	1983-11-21	沖電気工業株式会社	多チヤンネルバ−スト信号受信回路
US4460808A (en) *	1982-08-23	1984-07-17	At&T Bell Laboratories	Adaptive signal receiving method and apparatus
US4686699A (en) *	1984-12-21	1987-08-11	International Business Machines Corporation	Call progress monitor for a computer telephone interface
US4679224A (en) *	1985-12-02	1987-07-07	Keptel, Inc.	Telephone line testing circuit
US4696031A (en) *	1985-12-31	1987-09-22	Wang Laboratories, Inc.	Signal detection and discrimination using waveform peak factor
JPS6386945A (ja) *	1986-09-30	1988-04-18	Toshiba Corp	キ−入力確認音発生装置
US4786168A (en) *	1986-11-24	1988-11-22	The United States Of America As Represented By The United States National Aeronautics And Space Administration	Frequency domain laser velocimeter signal processor
DE4126815A1 (de) *	1991-08-09	1993-02-11	Hagenuk Telecom Gmbh	Sprachdecodierungssystem mit dtmf-regenerator und verfahren zur regenerierung eines dtmf-signals
US7190771B2 (en) *	2000-02-04	2007-03-13	Edge Access, Inc.	Internet telephony devices with circuity to announce incoming calls
US6724834B2 (en)	2002-02-22	2004-04-20	Albert L. Garrett	Threshold detector for detecting synchronization signals at correlator output during packet acquisition
US8461986B2 (en) *	2007-12-14	2013-06-11	Wayne Harvey Snyder	Audible event detector and analyzer for annunciating to the hearing impaired
WO2010007468A1 (en) *	2008-07-16	2010-01-21	Freescale Semiconductor, Inc.	Method and apparatus for detecting one or more predetermined tones transmitted over a communication network

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3743950A (en) *	1972-03-03	1973-07-03	Itt	Threshold detector for a voice frequency receiver
US3875347A (en) *	1973-10-01	1975-04-01	Gte Automatic Electric Lab Inc	Multifrequency signal receiver
US3942038A (en) *	1974-11-21	1976-03-02	Honeywell Inc.	Threshold gate having a variable threshold level
SE396684B (sv) *	1976-02-09	1977-09-26	Ericsson Telefon Ab L M	Hallkrets i en mottagaranordning for mfc-signalering
SE397763B (sv) *	1976-03-09	1977-11-14	Ericsson Telefon Ab L M	Mottagaranordning for storningskenslig detektering av atminstone tva tonfrekvenser i en inkommande tonsignal
IT1072242B (it) *	1976-12-17	1985-04-10	Cselt Centro Studi Lab Telecom	Procedimento e dispositivo per il riconoscimento di segnali telefonici in codice multifrequenza convertiti in forma numerica
US4091243A (en) *	1977-07-26	1978-05-23	Bell Telephone Laboratories, Incorporated	Multifrequency signal receiver

1978
- 1978-12-07 US US05/967,272 patent/US4227055A/en not_active Expired - Lifetime
1979
- 1979-11-30 SE SE7909903A patent/SE437101B/sv not_active IP Right Cessation
- 1979-12-03 IL IL58853A patent/IL58853A/xx unknown
- 1979-12-04 GB GB7941719A patent/GB2035757B/en not_active Expired
- 1979-12-04 AU AU53459/79A patent/AU533928B2/en not_active Expired
- 1979-12-04 DE DE2948676A patent/DE2948676C2/de not_active Expired
- 1979-12-05 CA CA000341243A patent/CA1142280A/en not_active Expired
- 1979-12-06 NL NLAANVRAGE7908831,A patent/NL190463C/xx not_active IP Right Cessation
- 1979-12-06 FR FR7929964A patent/FR2443783B1/fr not_active Expired
- 1979-12-06 BE BE0/198450A patent/BE880466A/fr not_active IP Right Cessation
- 1979-12-06 ES ES486655A patent/ES486655A1/es not_active Expired
- 1979-12-06 IT IT69354/79A patent/IT1119597B/it active
- 1979-12-06 CH CH10844/79A patent/CH647905A5/de not_active IP Right Cessation
- 1979-12-07 JP JP54158204A patent/JPH0763191B2/ja not_active Expired - Lifetime

Also Published As

Publication number	Publication date
NL7908831A (nl)	1980-06-10
US4227055A (en)	1980-10-07
GB2035757A (en)	1980-06-18
ES486655A1 (es)	1980-06-16
SE437101B (sv)	1985-02-04
NL190463B (nl)	1993-10-01
IL58853A0 (en)	1980-03-31
JPH0763191B2 (ja)	1995-07-05
CA1142280A (en)	1983-03-01
NL190463C (nl)	1994-03-01
DE2948676C2 (de)	1984-11-29
DE2948676A1 (de)	1980-06-19
AU5345979A (en)	1980-06-12
IT7969354A0 (it)	1979-12-06
AU533928B2 (en)	1983-12-22
FR2443783A1 (fr)	1980-07-04
FR2443783B1 (fr)	1986-10-03
IL58853A (en)	1982-04-30
GB2035757B (en)	1982-12-01
JPS55102961A (en)	1980-08-06
CH647905A5 (de)	1985-02-15
IT1119597B (it)	1986-03-10
BE880466A (fr)	1980-04-01

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Legal Events

Date	Code	Title	Description
1995-01-31	NAL	Patent in force	Ref document number: 7909903-2 Format of ref document f/p: F
2000-02-28	NUG	Patent has lapsed	Ref document number: 7909903-2 Format of ref document f/p: F

Date

Code

Title

Description

1995-01-31

NAL

Patent in force

Ref document number: 7909903-2

Format of ref document f/p: F

2000-02-28

NUG

Patent has lapsed