ATA438073A - Schaltungsanordnung fur mehrfrequenzen-codezeichenempfanger in fernmelde-, insbesondere fernsprechanlagen mit zusatzlichem datenverkehr - Google Patents

Schaltungsanordnung fur mehrfrequenzen-codezeichenempfanger in fernmelde-, insbesondere fernsprechanlagen mit zusatzlichem datenverkehr

Info

Publication number: ATA438073A
Authority: AT; Austria
Prior art keywords: systems; circuit arrangement; additional data; data traffic; frequency code
Prior art date: 1972-07-26

Application number

AT438073A

Other languages

English (en)

Other versions

AT326732B (de

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.)

1972-07-26

Filing date

1973-05-18

Publication date

1975-03-15

1973-05-18 Application filed by Siemens Ag filed Critical Siemens Ag

1975-03-15 Publication of ATA438073A publication Critical patent/ATA438073A/de

1975-12-29 Application granted granted Critical

1975-12-29 Publication of AT326732B publication Critical patent/AT326732B/de

Links

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Monitoring And Testing Of Exchanges (AREA)
Telephonic Communication Services (AREA)
Mobile Radio Communication Systems (AREA)

AT438073A 1972-07-26 1973-05-18 Schaltungsanordnung für mehrfrequenzen-codezeichenempfänger in fernmelde-, insbesondere fernsprechanlagen mit zusätzlichem datenverkehr AT326732B (de)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE2236781A DE2236781C2 (de)	1972-07-26	1972-07-26	Schaltungsanordnung für Mehrfrequenzen-Codezeichenempfänger in Fernmelde-, insbesondere Fernsprechanlagen mit zusätzlichem Datenverkehr

Publications (2)

Publication Number	Publication Date
ATA438073A true ATA438073A (de)	1975-03-15
AT326732B AT326732B (de)	1975-12-29

Family

ID=5851808

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
AT438073A AT326732B (de)	1972-07-26	1973-05-18	Schaltungsanordnung für mehrfrequenzen-codezeichenempfänger in fernmelde-, insbesondere fernsprechanlagen mit zusätzlichem datenverkehr

Country Status (12)

Country	Link
US (1)	US3914558A (de)
JP (1)	JPS4953702A (de)
AT (1)	AT326732B (de)
BE (1)	BE802836A (de)
CH (1)	CH558115A (de)
DE (1)	DE2236781C2 (de)
FR (1)	FR2194092B1 (de)
GB (1)	GB1427407A (de)
IT (1)	IT992675B (de)
LU (1)	LU68083A1 (de)
NL (1)	NL7309814A (de)
SE (1)	SE385179B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2534636A1 (de) *	1975-08-02	1977-02-17	Telefonbau & Normalzeit Gmbh	Schaltungsanordnung zum senden von anschaltinformationen, insbesondere in nebenstellenanlagen
JPS54120503A (en) *	1978-03-11	1979-09-19	Nippon Telegr & Teleph Corp <Ntt>	Coding system for push-button dial signal
FR2759224B1 (fr) *	1997-02-06	1999-04-30	Info Telecom	Procedes de transmission et de decodage acoustiques d'un message numerique et dispositifs correspondants

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3288940A (en) *	1963-10-24	1966-11-29	Automatic Elect Lab	Multifrequency signal receiver
US3582562A (en) *	1969-05-07	1971-06-01	Itt	Key telephone intercommunication system

1972
- 1972-07-26 DE DE2236781A patent/DE2236781C2/de not_active Expired
1973
- 1973-05-18 AT AT438073A patent/AT326732B/de not_active IP Right Cessation
- 1973-05-18 CH CH711773A patent/CH558115A/de not_active IP Right Cessation
- 1973-07-13 NL NL7309814A patent/NL7309814A/xx not_active Application Discontinuation
- 1973-07-18 GB GB3421773A patent/GB1427407A/en not_active Expired
- 1973-07-20 FR FR7326707A patent/FR2194092B1/fr not_active Expired
- 1973-07-23 US US381614A patent/US3914558A/en not_active Expired - Lifetime
- 1973-07-24 LU LU68083A patent/LU68083A1/xx unknown
- 1973-07-25 IT IT27032/73A patent/IT992675B/it active
- 1973-07-26 JP JP48084542A patent/JPS4953702A/ja active Pending
- 1973-07-26 SE SE7310414A patent/SE385179B/xx unknown
- 1973-07-26 BE BE133905A patent/BE802836A/xx unknown

Also Published As

Publication number	Publication date
LU68083A1 (de)	1974-03-07
FR2194092B1 (de)	1976-11-12
DE2236781A1 (de)	1973-11-08
FR2194092A1 (de)	1974-02-22
JPS4953702A (de)	1974-05-24
GB1427407A (en)	1976-03-10
BE802836A (fr)	1974-01-28
NL7309814A (de)	1974-01-29
US3914558A (en)	1975-10-21
AT326732B (de)	1975-12-29
IT992675B (it)	1975-09-30
DE2236781B1 (de)	1973-11-08
SE385179B (sv)	1976-06-08
DE2236781C2 (de)	1974-06-12
CH558115A (de)	1975-01-15

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Legal Events

Date	Code	Title	Description
1980-12-15	ELJ	Ceased due to non-payment of the annual fee