IT1026880B - Stazione d abbonato per impianti telefonici - Google Patents

Stazione d abbonato per impianti telefonici

Info

Publication number: IT1026880B
Authority: IT; Italy
Prior art keywords: subscriber station; telephone systems; telephone; systems; subscriber
Prior art date: 1973-12-12

Application number

IT30310/74A

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 IT1026880B publication Critical patent/IT1026880B/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
- H04M9/003—Transmission of control signals from or to the key telephone set; signalling equipment at key telephone set, e.g. keyboard or display equipment

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Sub-Exchange Stations And Push- Button Telephones (AREA)
Telephone Function (AREA)
Audible And Visible Signals (AREA)

IT30310/74A 1973-12-12 1974-12-09 Stazione d abbonato per impianti telefonici IT1026880B (it)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US426643A US3906168A (en)	1973-12-12	1973-12-12	Visual status indicator circuit

Publications (1)

Publication Number	Publication Date
IT1026880B true IT1026880B (it)	1978-10-20

Family

ID=23691627

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT30310/74A IT1026880B (it)	1973-12-12	1974-12-09	Stazione d abbonato per impianti telefonici

Country Status (13)

Country	Link
US (1)	US3906168A (it)
JP (1)	JPS5092612A (it)
AU (1)	AU7613574A (it)
BE (1)	BE823215A (it)
CA (1)	CA1009392A (it)
CH (1)	CH588194A5 (it)
DE (1)	DE2458349A1 (it)
ES (1)	ES432839A1 (it)
FR (1)	FR2254919B1 (it)
GB (1)	GB1494749A (it)
IT (1)	IT1026880B (it)
NL (1)	NL7416125A (it)
SE (1)	SE7415135L (it)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
USRE31144E (en) *	1974-12-27	1983-02-08	Interconnect Planning Corporation	Multi-station telephone switching system
JPS5344424Y2 (it) *	1975-08-07	1978-10-25
JPS52111302A (en) *	1976-03-15	1977-09-19	Taiko Denki Seisakusho:Kk	Connecting system of button telephone set
US4029909A (en) *	1976-03-23	1977-06-14	International Telephone And Telegraph Corporation	Operator supervisory circuit for a key telephone system
US4410767A (en) *	1976-05-17	1983-10-18	Iwasaki Tsushinki Kabushiki Kaisha	Key telephone system
US4046972A (en) *	1976-10-27	1977-09-06	Bell Telephone Laboratories, Incorporated	Key telephone station set circuit
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
CA1188831A (en) *	1982-12-14	1985-06-11	Mitel Corporation	Telephone indicator
US5517551A (en) *	1990-12-04	1996-05-14	Canon Kabushiki Kaisha	Telephone apparatus with dial key display for external line status
US5533117A (en) *	1993-08-03	1996-07-02	Chong H. Kim	Line status indicator for use with telephones sharing a single line
US5802166A (en) *	1994-11-30	1998-09-01	Sni Innovation, Inc.	Dual signal triggered message waiting notification system for indicating storage of different types of messages awaiting retrieval
DE10152450A1 (de) *	2001-10-26	2003-05-15	Sennheiser Electronic	Sprechzeug für die Telekommunikation
US20060017540A1 (en) *	2004-07-26	2006-01-26	Smith Jerry L	Fuse blow-out dual LED indicator
US7864035B2 (en) *	2007-10-26	2011-01-04	Embarq Holdings Company, Llc	System and method for determining whether a cordless handset is at a base unit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
BE563970A (it) *	1957-01-15
US3412213A (en) *	1965-07-20	1968-11-19	Kaymet Electronics Inc	Automatic telephone operated switch
US3459900A (en) *	1966-11-01	1969-08-05	David I Alster	Visual call indicator for telephone sets
US3733442A (en) *	1971-01-18	1973-05-15	Northern Electric Co	Hold circuit for multi-line key telephone system

1973
- 1973-12-12 US US426643A patent/US3906168A/en not_active Expired - Lifetime
1974
- 1974-10-23 CA CA212,050A patent/CA1009392A/en not_active Expired
- 1974-12-03 SE SE7415135A patent/SE7415135L/xx unknown
- 1974-12-06 AU AU76135/74A patent/AU7613574A/en not_active Expired
- 1974-12-09 IT IT30310/74A patent/IT1026880B/it active
- 1974-12-09 GB GB53236/74A patent/GB1494749A/en not_active Expired
- 1974-12-10 DE DE19742458349 patent/DE2458349A1/de active Pending
- 1974-12-11 BE BE151385A patent/BE823215A/xx unknown
- 1974-12-11 FR FR7440858A patent/FR2254919B1/fr not_active Expired
- 1974-12-11 CH CH1650574A patent/CH588194A5/xx not_active IP Right Cessation
- 1974-12-11 JP JP49141657A patent/JPS5092612A/ja active Pending
- 1974-12-11 NL NL7416125A patent/NL7416125A/xx not_active Application Discontinuation
- 1974-12-12 ES ES432839A patent/ES432839A1/es not_active Expired

Also Published As

Publication number	Publication date
AU7613574A (en)	1976-06-10
SE7415135L (it)	1975-06-13
BE823215A (fr)	1975-04-01
CH588194A5 (it)	1977-05-31
CA1009392A (en)	1977-04-26
JPS5092612A (it)	1975-07-24
ES432839A1 (es)	1976-11-01
US3906168A (en)	1975-09-16
FR2254919A1 (it)	1975-07-11
DE2458349A1 (de)	1975-06-19
NL7416125A (nl)	1975-06-16
GB1494749A (en)	1977-12-14
FR2254919B1 (it)	1977-03-18

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