CA1029140A - Circuit de ligne telephonique commande par signaux transitoires - Google Patents

Circuit de ligne telephonique commande par signaux transitoires

Info

Publication number: CA1029140A
Authority: CA; Canada
Prior art keywords: telephone line; line circuit; controlled telephone; transient controlled; transient
Prior art date: 1974-07-25
Legal status (The legal status 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 status listed.): Expired

Application number

CA229,072A

Other languages

English (en)

Other versions

CA229072S (en

Inventor

Ronald J. Angner

Alexander Feiner

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

AT&T Corp

Original Assignee

Western Electric Co Inc

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.)

1974-07-25

Filing date

1975-06-11

Publication date

1978-04-04

1975-06-11 Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc

1977-09-09 Priority to CA286,411A priority Critical patent/CA1033485A/fr

1977-09-09 Priority to CA286,412A priority patent/CA1037625A/fr

1978-04-04 Application granted granted Critical

1978-04-04 Publication of CA1029140A publication Critical patent/CA1029140A/fr

Status Expired legal-status Critical Current

Links

230000001052 transient effect Effects 0.000 title 1

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)
Interface Circuits In Exchanges (AREA)
Sub-Exchange Stations And Push- Button Telephones (AREA)
Monitoring And Testing Of Exchanges (AREA)

CA229,072A 1974-07-25 1975-06-11 Circuit de ligne telephonique commande par signaux transitoires Expired CA1029140A (fr)

Priority Applications (2)

Application Number	Priority Date	Filing Date	Title
CA286,411A CA1033485A (fr)	1974-07-25	1977-09-09	Ligne telephonique controlee par signaux transitoires
CA286,412A CA1037625A (fr)	1974-07-25	1977-09-09	Ligne telephonique controlee par signaux de transition

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US491823A US3925625A (en)	1974-07-25	1974-07-25	Transient controlled telephone line circuit

Publications (1)

Publication Number	Publication Date
CA1029140A true CA1029140A (fr)	1978-04-04

Family

ID=23953826

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA229,072A Expired CA1029140A (fr)	1974-07-25	1975-06-11	Circuit de ligne telephonique commande par signaux transitoires

Country Status (7)

Country	Link
US (1)	US3925625A (fr)
JP (1)	JPS5745389B2 (fr)
BE (1)	BE831694A (fr)
CA (1)	CA1029140A (fr)
DE (1)	DE2533014C2 (fr)
FR (1)	FR2280268A1 (fr)
GB (1)	GB1505926A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4039763A (en) *	1976-07-28	1977-08-02	Bell Telephone Laboratories, Incorporated	Key telephone communication path interface
US4057693A (en) *	1976-07-28	1977-11-08	Bell Telephone Laboratories, Incorporated	Logic control for electronic key telephone line circuit
US4056695A (en) *	1976-07-28	1977-11-01	Bell Telephone Laboratories, Incorporated	Key telephone line circuit tone-on-hold arrangement
US4149042A (en) *	1977-10-27	1979-04-10	Bell Telephone Laboratories, Incorporated	Modulated RF carrier distributing arrangement for key telephone line circuits
US4219701A (en) *	1978-09-21	1980-08-26	Bell Telephone Laboratories, Incorporated	Tone generating hold impedance circuit for key telephone line circuits
US4351987A (en) *	1981-03-31	1982-09-28	V-Band Systems, Inc.	Telephone line circuit hold arrangement
JPS59196188U (ja) *	1983-06-14	1984-12-27	永大産業株式会社	洗面化粧台

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
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
JPS5345515Y2 (fr) *	1971-04-02	1978-10-31
US3764752A (en) *	1972-01-11	1973-10-09	Teltronics Inc	Telephone line card system
JPS491525U (fr) *	1972-04-12	1974-01-08
US3748405A (en) *	1972-06-15	1973-07-24	Stromberg Carlson Corp	Key telephone system line circuit
US3840710A (en) *	1973-05-21	1974-10-08	Bell Telephone Labor Inc	Key telephone line circuit

1974
- 1974-07-25 US US491823A patent/US3925625A/en not_active Expired - Lifetime
1975
- 1975-06-11 CA CA229,072A patent/CA1029140A/fr not_active Expired
- 1975-07-24 FR FR7523144A patent/FR2280268A1/fr active Granted
- 1975-07-24 DE DE2533014A patent/DE2533014C2/de not_active Expired
- 1975-07-24 BE BE158578A patent/BE831694A/fr not_active IP Right Cessation
- 1975-07-24 GB GB31084/75A patent/GB1505926A/en not_active Expired
- 1975-07-25 JP JP50090363A patent/JPS5745389B2/ja not_active Expired

Also Published As

Publication number	Publication date
FR2280268B1 (fr)	1981-03-27
US3925625A (en)	1975-12-09
FR2280268A1 (fr)	1976-02-20
BE831694A (fr)	1975-11-17
GB1505926A (en)	1978-04-05
DE2533014A1 (de)	1976-02-05
DE2533014C2 (de)	1982-04-08
JPS5745389B2 (fr)	1982-09-27
JPS5148902A (fr)	1976-04-27

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