ATE861T1 - CIRCUIT ARRANGEMENT FOR TELEPHONE CHANNELS FOR DETECTING DIALING PULSE. - Google Patents
CIRCUIT ARRANGEMENT FOR TELEPHONE CHANNELS FOR DETECTING DIALING PULSE.Info
- Publication number
- ATE861T1 ATE861T1 AT79200287T AT79200287T ATE861T1 AT E861 T1 ATE861 T1 AT E861T1 AT 79200287 T AT79200287 T AT 79200287T AT 79200287 T AT79200287 T AT 79200287T AT E861 T1 ATE861 T1 AT E861T1
- Authority
- AT
- Austria
- Prior art keywords
- dialling
- circuit
- impulse
- receiving circuit
- blocking
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
- H04M15/34—Charging, billing or metering arrangements for private branch exchanges
-
- 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
- H04M1/667—Preventing unauthorised calls from a telephone set
- H04M1/67—Preventing unauthorised calls from a telephone set by electronic means
- H04M1/673—Preventing unauthorised calls from a telephone set by electronic means the user being required to key in a code
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Telephonic Communication Services (AREA)
- Telephone Function (AREA)
- Interface Circuits In Exchanges (AREA)
- Prepayment Telephone Systems (AREA)
Abstract
1. Circuit for telephone sets comprising a receiving circuit (E) connected to the telephone line (a, b) and equipped with a line-current detector (3) and a dialling-impulse detector (1) for detecting dialling impulses, characterized in that a dialling-impulse blocking circuit (P, R; P', R') is connected to the telephone line (a, b) at the side of the receiving circuit (E), which is turned away from the telephone set (T), said blocking circuit being controlled by said receiving circuit (E), and that the receiving circuit (E) comprises a call-impulse detector (5) and is arranged in such a way that after the cradle switch (G) of the telephone set (T) has closed, the dialling-impulse blocking circuit (P, R; P', R'), which is normally in its uneffective, non-blocking state, will change over in its blocking state until the receiving circuit (E) has received one of several given dialling-impulse combinations or until the cradle switch (G) has reopened.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH637678A CH628762A5 (en) | 1978-06-12 | 1978-06-12 | CIRCUIT ARRANGEMENT FOR TELEPHONE PARTICIPANTS FOR DETECTING DIALING PULSES. |
EP79200287A EP0006265B1 (en) | 1978-06-12 | 1979-06-08 | Circuit for telephone sets detecting the dialling pulses |
Publications (1)
Publication Number | Publication Date |
---|---|
ATE861T1 true ATE861T1 (en) | 1982-04-15 |
Family
ID=4308597
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT79200287T ATE861T1 (en) | 1978-06-12 | 1979-06-08 | CIRCUIT ARRANGEMENT FOR TELEPHONE CHANNELS FOR DETECTING DIALING PULSE. |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0006265B1 (en) |
AT (1) | ATE861T1 (en) |
CH (1) | CH628762A5 (en) |
DE (1) | DE2962506D1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1207459B (en) * | 1983-03-21 | 1989-05-25 | Italtel Spa | ELECTRONIC PADLOCK FOR USER TELEPHONE LINE. |
JPS60502077A (en) * | 1983-07-21 | 1985-11-28 | マルカ・プロプライアトリ−・リミテッド | telephone line disconnection device |
EP0183947B1 (en) * | 1984-11-22 | 1992-06-03 | Siemens Aktiengesellschaft | Method for registering outgoing calls made by the calling party in a private branch exchange |
FR2621437B1 (en) * | 1987-10-01 | 1990-01-05 | Genin Jacques | ACTIVE DIPOLE TELEPHONE LINE PROTECTION DEVICE |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3873781A (en) * | 1973-02-16 | 1975-03-25 | Electronic Arrays | Prevention of unauthorized use of telephone |
US3920936A (en) * | 1974-02-04 | 1975-11-18 | Charles S Mogtader | Toll-call restriction system |
US4045619A (en) * | 1975-03-17 | 1977-08-30 | Aristonics Corporation | Telephone control system |
-
1978
- 1978-06-12 CH CH637678A patent/CH628762A5/en not_active IP Right Cessation
-
1979
- 1979-06-08 AT AT79200287T patent/ATE861T1/en not_active IP Right Cessation
- 1979-06-08 DE DE7979200287T patent/DE2962506D1/en not_active Expired
- 1979-06-08 EP EP79200287A patent/EP0006265B1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
EP0006265A1 (en) | 1980-01-09 |
CH628762A5 (en) | 1982-03-15 |
DE2962506D1 (en) | 1982-05-27 |
EP0006265B1 (en) | 1982-04-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
REN | Ceased due to non-payment of the annual fee |