CH541914A - Circuit arrangement for telephone systems with inductive coupling of audio signals - Google Patents

Circuit arrangement for telephone systems with inductive coupling of audio signals

Info

Publication number: CH541914A
Authority: CH; Switzerland
Prior art keywords: audio signals; circuit arrangement; inductive coupling; telephone systems; telephone
Prior art date: 1971-03-11

Application number

CH245672A

Other languages

German (de)

Inventor

Kofler Christian

Original Assignee

Siemens Ag

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.)

1971-03-11

Filing date

1972-02-21

Publication date

1973-09-15

1972-02-21 Application filed by Siemens Ag filed Critical Siemens Ag

1973-09-15 Publication of CH541914A publication Critical patent/CH541914A/en

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Devices For Supply Of Signal Current (AREA)
Telephonic Communication Services (AREA)

CH245672A 1971-03-11 1972-02-21 Circuit arrangement for telephone systems with inductive coupling of audio signals CH541914A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE2111787		1971-03-11

Publications (1)

Publication Number	Publication Date
CH541914A true CH541914A (en)	1973-09-15

Family

ID=5801255

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CH245672A CH541914A (en)	1971-03-11	1972-02-21	Circuit arrangement for telephone systems with inductive coupling of audio signals

Country Status (9)

Country	Link
AT (1)	AT323811B (en)
BE (1)	BE780525A (en)
CH (1)	CH541914A (en)
DE (1)	DE2111787B1 (en)
FR (1)	FR2129593A5 (en)
GB (1)	GB1370163A (en)
IT (1)	IT956223B (en)
LU (1)	LU64933A1 (en)
NL (1)	NL7202872A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4028498A (en) *	1974-10-07	1977-06-07	Solid State Systems, Inc.	Private automatic branch exchange system and apparatus
DE3007942A1 (en) *	1980-03-01	1981-09-24	Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt	Tone signal generator for telephone exchange - has circuit which can be connected to one or more subscribers as required and ordered by central controller
DE3014572C2 (en) *	1980-04-16	1982-12-09	Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt	Circuit arrangement for sending low-frequency signals on connecting lines in telephone exchanges
IE54008B1 (en) *	1982-11-17	1989-05-10	Lake Electronic Tech	Apparatus for delivering a signal on a telephone

1971
- 1971-03-11 DE DE19712111787D patent/DE2111787B1/en active Pending
1972
- 1972-02-21 CH CH245672A patent/CH541914A/en not_active IP Right Cessation
- 1972-02-24 AT AT151872A patent/AT323811B/en not_active IP Right Cessation
- 1972-03-03 NL NL7202872A patent/NL7202872A/xx unknown
- 1972-03-08 GB GB1069572A patent/GB1370163A/en not_active Expired
- 1972-03-09 LU LU64933D patent/LU64933A1/xx unknown
- 1972-03-10 BE BE780525A patent/BE780525A/en unknown
- 1972-03-10 IT IT21669/72A patent/IT956223B/en active
- 1972-03-10 FR FR7208410A patent/FR2129593A5/fr not_active Expired

Also Published As

Publication number	Publication date
LU64933A1 (en)	1972-07-07
DE2111787B1 (en)	1972-05-31
GB1370163A (en)	1974-10-16
IT956223B (en)	1973-10-10
BE780525A (en)	1972-09-11
NL7202872A (en)	1972-09-13
AT323811B (en)	1975-07-25
FR2129593A5 (en)	1972-10-27

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Legal Events

Date	Code	Title	Description
1978-10-13	PL	Patent ceased