SE7714181L - Detektering av telefonsignaler - Google Patents

Detektering av telefonsignaler

Info

Publication number: SE7714181L
Authority: SE; Sweden
Prior art keywords: detection; telephone signals; telephone; signals
Prior art date: 1976-12-17

Application number

SE7714181A

Other languages

Unknown language ( )

English (en)

Other versions

SE437102B (sv

Inventor

F Melindo

R Rocci

Original Assignee

Studio E Lab Telecomunicazioni

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.)

1976-12-17

Filing date

1977-12-14

Publication date

1978-06-18

1977-12-14 Application filed by Studio E Lab Telecomunicazioni filed Critical Studio E Lab Telecomunicazioni

1978-06-18 Publication of SE7714181L publication Critical patent/SE7714181L/sv

1985-02-04 Publication of SE437102B publication Critical patent/SE437102B/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
- H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
- H04Q1/4575—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals which are transmitted in digital form
- 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

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Mobile Radio Communication Systems (AREA)
Data Exchanges In Wide-Area Networks (AREA)

SE7714181A 1976-12-17 1977-12-14 Forfarande for detektering av digitala flerfrekvenskodade insignaler av pcm-typ och digital mottagare for genomforande av forfarandet SE437102B (sv)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
IT7000776A IT1072242B (it)	1976-12-17	1976-12-17	Procedimento e dispositivo per il riconoscimento di segnali telefonici in codice multifrequenza convertiti in forma numerica

Publications (2)

Publication Number	Publication Date
SE7714181L true SE7714181L (sv)	1978-06-18
SE437102B SE437102B (sv)	1985-02-04

Family

ID=11313285

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
SE7714181A SE437102B (sv)	1976-12-17	1977-12-14	Forfarande for detektering av digitala flerfrekvenskodade insignaler av pcm-typ och digital mottagare for genomforande av forfarandet

Country Status (11)

Country	Link
JP (1)	JPS53121408A (sv)
AR (1)	AR216659A1 (sv)
AU (1)	AU507727B2 (sv)
BR (1)	BR7707827A (sv)
DE (1)	DE2756251C3 (sv)
FR (1)	FR2374808A1 (sv)
GB (1)	GB1566164A (sv)
IT (1)	IT1072242B (sv)
MX (1)	MX144395A (sv)
SE (1)	SE437102B (sv)
TR (1)	TR19857A (sv)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2440126A1 (fr) *	1978-10-27	1980-05-23	Materiel Telephonique	Dispositif et procede de reconnaissance pour recepteur numerique de signaux multifrequences
US4227055A (en) *	1978-12-07	1980-10-07	Bell Telephone Laboratories, Incorporated	Multifrequency receiver
CA1111531A (en) *	1979-02-22	1981-10-27	Jackylene K. Hood	Digital signalling receiver for receiving pcm tones
NL7903346A (nl) *	1979-04-27	1980-10-29	Bell Telephone Mfg	Digitaal signaleringsstelsel.
FR2479631B1 (fr) *	1980-03-28	1986-07-25	Cit Alcatel	Dispositif de confirmation de signaux
FR2485843B1 (fr) *	1980-06-25	1986-11-07	Cit Alcatel	Recepteur numerique de frequences
IT1148885B (it) *	1980-07-09	1986-12-03	Sits Soc It Telecom Siemens	Unita' di controllo della segnalazione di tipo multifrequenza,di particolare applicazione nelle centrali telefonichedi transito di tipo numerico
US4385208A (en) *	1981-04-15	1983-05-24	Bell Telephone Laboratories, Incorporated	Multifrequency receiver
DE3424327A1 (de) *	1984-07-02	1986-01-09	Philips Patentverwaltung Gmbh, 2000 Hamburg	Verfahren und schaltungsanordnung zur bestimmung der einhuellenden von signalkomponenten eines mehrfrequenzcodierten wahlzeichens
CH672968A5 (sv) *	1984-11-30	1990-01-15	Autophon Ascom Ag
JPS61225929A (ja) *	1985-03-30	1986-10-07	Fujitsu Ltd	デイジタルト−ンの生成方法
US4783845A (en) *	1985-12-20	1988-11-08	Itt Aerospace Optical	Digital tone squelch detector
JPS62204652A (ja) *	1986-03-04	1987-09-09	Nec Corp	可聴周波信号識別方式
JP6043023B1 (ja) *	2013-09-20	2016-12-14	プロテウスデジタルヘルス，インコーポレイテッド	スライスおよびワーピングを用いて雑音の存在下で信号を受信しデコードするための方法、デバイスおよびシステム

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3773981A (en) *	1972-08-07	1973-11-20	Ibm	Parallel tone multiplexer-receiver
CA984068A (en) *	1972-08-10	1976-02-17	Alexander D. Proudfoot	Method and apparatus for detecting the presence of signal components of predetermined frequency in a multi-frequency signal
NL7316990A (nl) *	1973-12-12	1975-06-16	Philips Nv	Mfc-ontvanger voor digitale signaalverwerking.
FR2295665A1 (fr) *	1974-12-18	1976-07-16	Labo Cent Telecommunicat	Recepteur numerique de signaux multifrequences
DE2515769A1 (de) *	1975-04-10	1976-10-21	Standard Elektrik Lorenz Ag	Frequenzselektiver signalempfaenger

1976
- 1976-12-17 IT IT7000776A patent/IT1072242B/it active
1977
- 1977-10-20 AR AR26966577A patent/AR216659A1/es active
- 1977-11-24 BR BR7707827A patent/BR7707827A/pt unknown
- 1977-12-02 JP JP14409877A patent/JPS53121408A/ja active Granted
- 1977-12-07 AU AU31320/77A patent/AU507727B2/en not_active Expired
- 1977-12-13 TR TR1985777A patent/TR19857A/xx unknown
- 1977-12-14 SE SE7714181A patent/SE437102B/sv not_active IP Right Cessation
- 1977-12-14 FR FR7737621A patent/FR2374808A1/fr active Granted
- 1977-12-16 DE DE19772756251 patent/DE2756251C3/de not_active Expired
- 1977-12-16 MX MX17182777A patent/MX144395A/es unknown
- 1977-12-16 GB GB5258577A patent/GB1566164A/en not_active Expired

Also Published As

Publication number	Publication date
BR7707827A (pt)	1978-08-22
JPS5731342B2 (sv)	1982-07-03
TR19857A (tr)	1980-03-01
DE2756251B2 (de)	1981-03-26
AR216659A1 (es)	1980-01-15
GB1566164A (en)	1980-04-30
IT1072242B (it)	1985-04-10
AU3132077A (en)	1979-06-14
DE2756251A1 (de)	1978-06-22
DE2756251C3 (de)	1981-11-19
FR2374808B1 (sv)	1982-03-19
SE437102B (sv)	1985-02-04
MX144395A (es)	1981-10-07
AU507727B2 (en)	1980-02-28
FR2374808A1 (fr)	1978-07-13
JPS53121408A (en)	1978-10-23

Publication	Publication Date	Title
SE424138B (sv)	1982-07-05	Hjertsignalsdetektor
SE7714428L (sv)	1978-06-28	Stromlos avsettning av metaller
NL7714388A (nl)	1978-06-27	Registratie van digitale signalen.
DK196177A (da)	1977-11-06	Fotoelektrisk signalfrembringgnde kredslob
SE414062B (sv)	1980-07-07	Forbindning av plattor
SE7700032L (sv)	1977-07-06	Framstellning av n-fosfonometylglysin
SE7704964L (sv)	1977-10-31	Signaldetektor
FI772800A (fi)	1978-03-30	Anordning foer bahandling av vatten
SE7714181L (sv)	1978-06-18	Detektering av telefonsignaler
AT358111B (de)	1980-08-25	Referenzsignalgenerator
SE7801410L (sv)	1978-08-10	Anordning for diskriminering av talsignaler
SE7703451L (sv)	1977-10-01	Anordning for detektering av storsignaler
SE7704074L (sv)	1977-10-10	Reduktion av vanadinoxider
IT1086271B (it)	1985-05-28	Determinazione di barbiturici
SE7700546L (sv)	1977-07-23	Signalbehandlare
SE7704002L (sv)	1978-02-26	Bestemning av katekolaminer
SE7706985L (sv)	1977-12-29	Reglering av talsignaler i telefonnet
SE7613197L (sv)	1977-06-06	Ringsignalanordning
IT1065540B (it)	1985-02-25	Tromba elettroacustica di segnalazione
SE7712366L (sv)	1978-06-10	Signalgenerator
SE7706515L (sv)	1977-12-05	Forfarande for fornetning av plymerer
SE7707340L (sv)	1977-12-24	Anordning for sammanfogning av konstruktionselement
BR7701123A (pt)	1977-10-18	Aparelho amplificador de sinal
FI772701A (fi)	1978-04-16	Foerfarande foer sammanfogning av traebyggnadsdelar
SE7807475L (sv)	1979-03-01	Av dorrgangjernen oberoende dorrhallare

Legal Events

Date	Code	Title	Description
1995-01-31	NUG	Patent has lapsed	Ref document number: 7714181-0 Effective date: 19901019 Format of ref document f/p: F

Date

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Description

1995-01-31

NUG

Patent has lapsed

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