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
Application number
AT79200287T
Other languages
German (de)
Inventor
Bruno Koch
Daniel Courvoisier
Original Assignee
Sodeco-Saia Sa
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.)
Filing date
Publication date
Application filed by Sodeco-Saia Sa filed Critical Sodeco-Saia Sa
Application granted granted Critical
Publication of ATE861T1 publication Critical patent/ATE861T1/en

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.
AT79200287T 1978-06-12 1979-06-08 CIRCUIT ARRANGEMENT FOR TELEPHONE CHANNELS FOR DETECTING DIALING PULSE. ATE861T1 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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