IT1182761B - KEYBOARD ADAPTATION DEVICE WITH DECIMAL OR MULTIFREQUENCY EMISSION ON TELEPHONE - Google Patents

KEYBOARD ADAPTATION DEVICE WITH DECIMAL OR MULTIFREQUENCY EMISSION ON TELEPHONE

Info

Publication number: IT1182761B
Authority: IT; Italy
Prior art keywords: decimal; telephone; adaptation device; multifrequency; emission
Prior art date: 1984-06-19

Application number

IT48228/85A

Other languages

Italian (it)

Other versions

IT8548228A0 (en

Inventor

Jean-Jacques Raynal

Original Assignee

Semiconducteurs Soc Gen De

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.)

1984-06-19

Filing date

1985-06-17

Publication date

1987-10-05

1985-06-17 Application filed by Semiconducteurs Soc Gen De filed Critical Semiconducteurs Soc Gen De

1985-06-17 Publication of IT8548228A0 publication Critical patent/IT8548228A0/en

1987-10-05 Application granted granted Critical

1987-10-05 Publication of IT1182761B publication Critical patent/IT1182761B/en

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Input From Keyboards Or The Like (AREA)
Telephonic Communication Services (AREA)
Devices For Supply Of Signal Current (AREA)

IT48228/85A 1984-06-19 1985-06-17 KEYBOARD ADAPTATION DEVICE WITH DECIMAL OR MULTIFREQUENCY EMISSION ON TELEPHONE IT1182761B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR8409584A FR2566215B1 (en)	1984-06-19	1984-06-19	DEVICE FOR ADAPTING A KEYBOARD WITH DECIMAL OR MULTI-FREQUENCY TRANSMISSION ON A TELEPHONE STATION

Publications (2)

Publication Number	Publication Date
IT8548228A0 IT8548228A0 (en)	1985-06-17
IT1182761B true IT1182761B (en)	1987-10-05

Family

ID=9305192

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT48228/85A IT1182761B (en)	1984-06-19	1985-06-17	KEYBOARD ADAPTATION DEVICE WITH DECIMAL OR MULTIFREQUENCY EMISSION ON TELEPHONE

Country Status (4)

Country	Link
DE (1)	DE3521928C2 (en)
FR (1)	FR2566215B1 (en)
GB (1)	GB2160745B (en)
IT (1)	IT1182761B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE4321778C2 (en) *	1993-06-30	1996-10-02	Siemens Ag	DTMF / IWV circuitry for telephone terminals
DE4415952C2 (en) *	1994-05-05	1996-09-12	Siemens Ag	Circuit arrangement for telecommunication devices, in particular two / four wire interfaces of cordless base stations

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1307266A (en) *	1970-07-27	1973-02-14	Modern Telephones Ltd	Automatic telephone systems
FR2270738B1 (en) *	1974-02-14	1979-02-09	Merlin Jean Claude
CH620559A5 (en) *	1977-09-12	1980-11-28	Sodeco Compteurs De Geneve
FR2419624A1 (en) *	1978-03-08	1979-10-05	Roche Bernard	TELEPHONE STATION WITH KEYPAD WITH AUTOMATIC SWITCHING OF PULSE AND MULTI-FREQUENCY DIALING CODES
US4194098A (en) *	1978-06-12	1980-03-18	Metro-Tel Corp.	Lineman's hand test set
FR2520569B1 (en) *	1982-01-27	1986-08-14	Anep	ELECTRONIC TELEPHONE KEYBOARD FOR REPLACING A DIAL OF AN EXISTING STATION

1984
- 1984-06-19 FR FR8409584A patent/FR2566215B1/en not_active Expired
1985
- 1985-06-17 IT IT48228/85A patent/IT1182761B/en active
- 1985-06-19 DE DE3521928A patent/DE3521928C2/en not_active Expired - Fee Related
- 1985-06-19 GB GB08515467A patent/GB2160745B/en not_active Expired

Also Published As

Publication number	Publication date
DE3521928C2 (en)	1996-02-15
DE3521928A1 (en)	1985-12-19
GB2160745B (en)	1988-05-05
FR2566215B1 (en)	1986-10-10
GB2160745A (en)	1985-12-24
FR2566215A1 (en)	1985-12-20
IT8548228A0 (en)	1985-06-17
GB8515467D0 (en)	1985-07-24

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Legal Events

Date	Code	Title	Description
1999-10-27	TA	Fee payment date (situation as of event date), data collected since 19931001	Effective date: 19970628