FR2427748A1 - Dispositif de controle des appels telephoniques arrivant a une station d'abonne - Google Patents
Dispositif de controle des appels telephoniques arrivant a une station d'abonneInfo
- Publication number
- FR2427748A1 FR2427748A1 FR7822913A FR7822913A FR2427748A1 FR 2427748 A1 FR2427748 A1 FR 2427748A1 FR 7822913 A FR7822913 A FR 7822913A FR 7822913 A FR7822913 A FR 7822913A FR 2427748 A1 FR2427748 A1 FR 2427748A1
- Authority
- FR
- France
- Prior art keywords
- subscriber
- telephone calls
- subscriber station
- control
- station
- Prior art date
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
- H04M1/663—Preventing unauthorised calls to a telephone set
- H04M1/665—Preventing unauthorised calls to a telephone set by checking the validity of a code
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Telephonic Communication Services (AREA)
- Devices For Supply Of Signal Current (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Alarm Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH587878A CH623695A5 ( ) | 1978-05-30 | 1978-05-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2427748A1 true FR2427748A1 (fr) | 1979-12-28 |
FR2427748B1 FR2427748B1 ( ) | 1982-06-11 |
Family
ID=4300837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7822913A Granted FR2427748A1 (fr) | 1978-05-30 | 1978-07-28 | Dispositif de controle des appels telephoniques arrivant a une station d'abonne |
Country Status (5)
Country | Link |
---|---|
CH (1) | CH623695A5 ( ) |
FR (1) | FR2427748A1 ( ) |
GB (1) | GB2037540B ( ) |
SE (1) | SE420555B ( ) |
WO (1) | WO1979001145A1 ( ) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4439638A (en) * | 1982-01-28 | 1984-03-27 | International Mobile Machines Corp. | Sound-activated code-controlled detection system for telephones and the like |
GB2203614A (en) * | 1987-04-09 | 1988-10-19 | British Broadcasting Corp | Control of access to a telephone |
GB2240903B (en) * | 1990-02-13 | 1994-07-13 | Proton Communications | Automatic telephone call interceptor and interrogator devices |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2278214A1 (fr) * | 1974-06-28 | 1976-02-06 | Int Mobile Machines | Dispositif telephonique comprenant un element d'inhibition de sonnerie |
-
1978
- 1978-05-30 CH CH587878A patent/CH623695A5/fr not_active IP Right Cessation
- 1978-07-28 FR FR7822913A patent/FR2427748A1/fr active Granted
-
1979
- 1979-05-25 GB GB8003187A patent/GB2037540B/en not_active Expired
- 1979-05-25 WO PCT/CH1979/000076 patent/WO1979001145A1/de unknown
-
1980
- 1980-01-25 SE SE8000586A patent/SE420555B/sv not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2278214A1 (fr) * | 1974-06-28 | 1976-02-06 | Int Mobile Machines | Dispositif telephonique comprenant un element d'inhibition de sonnerie |
Also Published As
Publication number | Publication date |
---|---|
FR2427748B1 ( ) | 1982-06-11 |
SE420555B (sv) | 1981-10-12 |
GB2037540A (en) | 1980-07-09 |
CH623695A5 ( ) | 1981-06-15 |
GB2037540B (en) | 1982-08-18 |
SE8000586L (sv) | 1980-01-25 |
WO1979001145A1 (en) | 1979-12-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2404875A1 (fr) | Systeme de commande d'une station de base | |
NO865085D0 (no) | Anordning for styre sendeeffekten i en radiooverfoeringsvei | |
BR9000974A (pt) | Sistema de telecomunicacao | |
EP0684722A3 (en) | Diverter interface between two telecommunication lines and a subscriber station set | |
FI823138A0 (fi) | Foerfarande foer hjaelpbehoevande maenniskors saendande av noedanrop | |
FR2437665A1 (fr) | Interrupteur vocal | |
FR2427748A1 (fr) | Dispositif de controle des appels telephoniques arrivant a une station d'abonne | |
JPS5690664A (en) | Acceptance system for extension connection information | |
FR2422295A1 (fr) | Modulateur-demodulateur de donnees | |
FR2419624A1 (fr) | Poste telephonique a clavier a commutation automatique des codes de numerotation a impulsions et a multifrequence | |
FR2451682A1 (fr) | Dispositif d'appel pour installation telephonique automatique d'abonne avec postes supplementaires | |
JPS57190436A (en) | Adjusting method for optical transmitting line | |
JPS5610766A (en) | Talking monitor system | |
JPS5735450A (en) | Communication speed switching system for modulation and demodulation device | |
FR2420887A1 (fr) | Equipement de raccordement a une ligne circulaire d'un poste telephonique destine a une installation d'intercommunication-interphonie | |
JPS5387611A (en) | Automatic answering telephone system using telephone facsimile terminal | |
JPS5691576A (en) | Transmission system for subscriber's line signal | |
JPS57162868A (en) | Data terminal device | |
JPS5775094A (en) | Dial transmission system | |
JPS5539410A (en) | Increasing method of transmission efficiency for data communication | |
JPS6331659U ( ) | ||
KR940017693A (ko) | 팩스(fax) 사서함의 안내메세지 송출장치 및 방법 | |
JPS6450628A (en) | Transmission level adjusting system for data modulator and demodulator | |
JPS5769965A (en) | Remote station communicating system | |
JPS55133157A (en) | Integrated transmission system for digital line |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |