IT1026881B - Stazione d abbonato per impianti telefonici - Google Patents

Stazione d abbonato per impianti telefonici

Info

Publication number: IT1026881B
Authority: IT; Italy
Prior art keywords: subscriber station; telephone systems; telephone; systems; subscriber
Prior art date: 1973-12-12

Application number

IT30311/74A

Other languages

English (en)

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.)

1973-12-12

Filing date

1974-12-09

Publication date

1978-10-20

1974-12-09 Application filed by Western Electric Co filed Critical Western Electric Co

1978-10-20 Application granted granted Critical

1978-10-20 Publication of IT1026881B publication Critical patent/IT1026881B/it

Links

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
- H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
- H04M9/006—Exchange line circuits

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Sub-Exchange Stations And Push- Button Telephones (AREA)
Interface Circuits In Exchanges (AREA)

IT30311/74A 1973-12-12 1974-12-09 Stazione d abbonato per impianti telefonici IT1026881B (it)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US426648A US3916116A (en)	1973-12-12	1973-12-12	Hold bridge circuit

Publications (1)

Publication Number	Publication Date
IT1026881B true IT1026881B (it)	1978-10-20

Family

ID=23691644

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT30311/74A IT1026881B (it)	1973-12-12	1974-12-09	Stazione d abbonato per impianti telefonici

Country Status (12)

Country	Link
US (1)	US3916116A (it)
JP (1)	JPS584508B2 (it)
BE (1)	BE823214A (it)
CA (1)	CA1006995A (it)
CH (1)	CH594335A5 (it)
DE (1)	DE2458298C2 (it)
ES (1)	ES432840A1 (it)
FR (1)	FR2254920B1 (it)
GB (1)	GB1490869A (it)
IT (1)	IT1026881B (it)
NL (1)	NL177547C (it)
SE (1)	SE7415136L (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS5184504A (it) *	1975-01-21	1976-07-23	Iwatsu Electric Co Ltd
JPS52111302A (en) *	1976-03-15	1977-09-19	Taiko Denki Seisakusho:Kk	Connecting system of button telephone set
WO1979000078A1 (en) *	1977-08-01	1979-02-22	H Rasmussen	Hold control for a key telephone system
US4132860A (en) *	1977-08-01	1979-01-02	Crest Industries, Inc.	Hold control for a key telephone system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2862062A (en) *	1956-05-22	1958-11-25	Bell Telephone Labor Inc	Holding arrangement for universaltype line circuit
US3283083A (en) *	1963-03-13	1966-11-01	American Telephone & Telegraph	Telephone subscriber's line circuit
US3436488A (en) *	1966-03-17	1969-04-01	Bell Telephone Labor Inc	Line circuit for a key telephone system utilizing a single multifunction supervisory relay
DE1562142C3 (de) *	1968-02-29	1975-05-15	Siemens Ag, 1000 Berlin U. 8000 Muenchen	Schaltungsanordnung für Chef-Sekretärstationen in Fernsprechnebenstellenanlagen
IL30070A (en) *	1968-05-24	1971-05-26	Telrad Telecommunication & Ele	Line grip circuit for multi-line telephone system
JPS4932003B1 (it) *	1969-03-31	1974-08-27
US3725600A (en) *	1969-12-18	1973-04-03	American Telephone & Telegraph	Communication call holding circuit
US3733442A (en) *	1971-01-18	1973-05-15	Northern Electric Co	Hold circuit for multi-line key telephone system
US3764752A (en) *	1972-01-11	1973-10-09	Teltronics Inc	Telephone line card system

1973
- 1973-12-12 US US426648A patent/US3916116A/en not_active Expired - Lifetime
1974
- 1974-10-28 CA CA212,366A patent/CA1006995A/en not_active Expired
- 1974-12-03 SE SE7415136A patent/SE7415136L/xx unknown
- 1974-12-09 GB GB53237/74A patent/GB1490869A/en not_active Expired
- 1974-12-09 IT IT30311/74A patent/IT1026881B/it active
- 1974-12-10 DE DE2458298A patent/DE2458298C2/de not_active Expired
- 1974-12-11 FR FR7440859A patent/FR2254920B1/fr not_active Expired
- 1974-12-11 BE BE151384A patent/BE823214A/xx not_active IP Right Cessation
- 1974-12-11 CH CH1650474A patent/CH594335A5/xx not_active IP Right Cessation
- 1974-12-11 NL NLAANVRAGE7416124,A patent/NL177547C/xx not_active IP Right Cessation
- 1974-12-12 ES ES432840A patent/ES432840A1/es not_active Expired
- 1974-12-12 JP JP49142089A patent/JPS584508B2/ja not_active Expired

Also Published As

Publication number	Publication date
AU7613474A (en)	1976-06-10
CH594335A5 (it)	1978-01-13
JPS5092613A (it)	1975-07-24
DE2458298C2 (de)	1984-04-26
FR2254920B1 (it)	1977-04-08
US3916116A (en)	1975-10-28
GB1490869A (en)	1977-11-02
NL177547B (nl)	1985-05-01
NL7416124A (nl)	1975-06-16
NL177547C (nl)	1985-10-01
BE823214A (fr)	1975-04-01
DE2458298A1 (de)	1975-06-19
CA1006995A (en)	1977-03-15
SE7415136L (it)	1975-06-13
JPS584508B2 (ja)	1983-01-26
ES432840A1 (es)	1976-11-01
FR2254920A1 (it)	1975-07-11

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