SE7712613L - Telefonapparat - Google Patents

Telefonapparat

Info

Publication number: SE7712613L
Authority: SE; Sweden
Prior art keywords: telephone
Prior art date: 1976-11-12

Application number

SE7712613A

Other languages

English (en)

Inventor

R Ceruti

O Malerba

Original Assignee

Cselt Centro Studi Lab Telecom

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.)

1976-11-12

Filing date

1977-11-08

Publication date

1979-05-13

1977-11-08 Application filed by Cselt Centro Studi Lab Telecom filed Critical Cselt Centro Studi Lab Telecom

1979-05-13 Publication of SE7712613L publication Critical patent/SE7712613L/sv

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
- H04M1/745—Protection devices or circuits for voltages surges on the line

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Devices For Supply Of Signal Current (AREA)
Monitoring And Testing Of Exchanges (AREA)
Telephonic Communication Services (AREA)
Sub-Exchange Stations And Push- Button Telephones (AREA)
Interface Circuits In Exchanges (AREA)

SE7712613A 1976-11-12 1977-11-08 Telefonapparat SE7712613L (sv)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
IT69699/76A IT1071838B (it)	1976-11-12	1976-11-12	Soppressore di impulsi di suoneria indesiderati per apparecchi telefonici

Publications (1)

Publication Number	Publication Date
SE7712613L true SE7712613L (sv)	1979-05-13

Family

ID=11312657

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
SE7712613A SE7712613L (sv)	1976-11-12	1977-11-08	Telefonapparat

Country Status (8)

Country	Link
US (1)	US4152549A (sv)
JP (1)	JPS5361903A (sv)
DE (1)	DE2749458C3 (sv)
FR (1)	FR2371100A1 (sv)
GB (1)	GB1586690A (sv)
IT (1)	IT1071838B (sv)
NL (1)	NL172909C (sv)
SE (1)	SE7712613L (sv)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4213012A (en) *	1978-11-03	1980-07-15	General Signal Corporation	Discriminating means for telephone circuits
US4529844A (en) *	1983-09-26	1985-07-16	Dong Jun Industrial Co., Ltd.	Pulse output telephone system with ring tap elimination
SE459138B (sv) *	1987-10-08	1989-06-05	Ericsson Telefon Ab L M	Anordning i ett telekommunikationssystem vid inkoppling och urkoppling av en ringsignal
IT1254795B (it) *	1992-02-17	1995-10-11	St Microelectronics Srl	Dispositivo di soppressione di retroazione acustica particolarmente per suonerie ausiliarie in impianti telefonici a spina.
US5465297A (en) *	1994-03-11	1995-11-07	Design Tech International Inc.	Telephone line seizure circuit
DE69532885D1 (de) *	1995-07-28	2004-05-19	St Microelectronics Srl	Störungsklingelunterdrückungsvorrichtung, insbesondere für Zusatzklingeln in Stecktelephonsystemen
JP2006325088A (ja) *	2005-05-20	2006-11-30	Nec Infrontia Corp	電話装置、電話交換機及び電話回線接続方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR1465926A (fr) *	1966-01-26	1967-01-13	Ericsson Telefon Ab L M	Dispositif semi-conducteur à seuil utilisé dans un circuit téléphonique pour empêcher le courant continu de passer et éteindre les étincelles
GB1318870A (en) *	1969-07-09	1973-05-31	Gen Electric Co Ltd	Telephone apparatus incorporating a tone caller
JPS5148847B2 (sv) *	1971-11-10	1976-12-23
DE2205559C3 (de) *	1972-02-07	1980-08-14	Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt	Schaltungsanordnung für Wechselstrom-Anrufempfangsstrecken zur Verhinderung der Einwirkung von Gleichstromimpulsen
FR2269251A1 (en) *	1974-04-26	1975-11-21	Trt Telecom Radio Electr	Telephone receiver with ringing apparatus - has bell permanently across line with shunt to prevent outgoing calls ringing local bell
US4031332A (en) *	1976-02-02	1977-06-21	Cook Electric Company	Telephone ringer insolator

1976
- 1976-11-12 IT IT69699/76A patent/IT1071838B/it active
1977
- 1977-09-02 NL NLAANVRAGE7709731,A patent/NL172909C/xx not_active IP Right Cessation
- 1977-11-02 GB GB45623/77A patent/GB1586690A/en not_active Expired
- 1977-11-02 FR FR7732877A patent/FR2371100A1/fr active Granted
- 1977-11-02 JP JP13091077A patent/JPS5361903A/ja active Pending
- 1977-11-04 DE DE2749458A patent/DE2749458C3/de not_active Expired
- 1977-11-08 SE SE7712613A patent/SE7712613L/sv not_active Application Discontinuation
- 1977-11-11 US US05/850,809 patent/US4152549A/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
NL7709731A (nl)	1978-05-17
IT1071838B (it)	1985-04-10
JPS5361903A (en)	1978-06-02
DE2749458B2 (de)	1979-02-01
NL172909C (nl)	1983-11-01
FR2371100A1 (fr)	1978-06-09
US4152549A (en)	1979-05-01
GB1586690A (en)	1981-03-25
FR2371100B1 (sv)	1981-09-11
DE2749458C3 (de)	1986-07-31
DE2749458A1 (de)	1978-05-18

Publication	Publication Date	Title
SE426729B (sv)	1983-02-07	Festanordning
DK413877A (da)	1978-03-21	Boreslam
DK304877A (da)	1978-01-08	Splitplok
FI65491B (fi)	1984-01-31	Underskottsmaetare
SE7707030L (sv)	1977-12-18	Kiselstal iii
SE434209B (sv)	1984-07-16	Festanordning
DD131101A1 (de)	1978-05-31	Maximalleistungsueberwachungsgeraet
DK304977A (da)	1978-01-13	7-beta-oxyiminoacylcephalosporiner
PL199769A1 (pl)	1978-03-28	Telekomunikacyjna centrala czasowa
BR7706948A (pt)	1979-05-22	Conjunto percussor
DK57777A (da)	1977-08-12	Veskeapplikator
NL7713405A (nl)	1978-06-06	Telefoontoestel.
ATA175777A (de)	1979-10-15	Sprechfunksystem
SE7712613L (sv)	1979-05-13	Telefonapparat
FI54018B (fi)	1978-05-31	Belastningskompenserad hydrostatisk effekttransmissionsanordning
BE846205A (fr)	1977-03-15	M-alkyldiphenylamines
SE421577B (sv)	1982-01-04	Telefonlinjeutrustning
SE7706955L (sv)	1977-12-16	Telefonautomat
AT371411B (de)	1983-06-27	Skibob
BE841105A (nl)	1976-10-26	Telekommunikatie toestel
ATA276676A (de)	1977-05-15	Mobelverbindung
DD131276A5 (de)	1978-06-14	Waelzschraubengetriebe
BE856722A (fr)	1978-01-12	Aspidospermidines
IT1081974B (it)	1985-05-21	Posto telefonico
FI54185C (fi)	1978-10-10	Fiskpump

Legal Events

Date	Code	Title	Description
1995-02-28	NAV	Patent application has lapsed	Ref document number: 7712613-4