CA1132276A - Dispositif telephonique - Google Patents

Dispositif telephonique

Info

Publication number
CA1132276A
CA1132276A CA300,862A CA300862A CA1132276A CA 1132276 A CA1132276 A CA 1132276A CA 300862 A CA300862 A CA 300862A CA 1132276 A CA1132276 A CA 1132276A
Authority
CA
Canada
Prior art keywords
pulse
prohibited
telephone
telephone line
train
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.)
Expired
Application number
CA300,862A
Other languages
English (en)
Inventor
Gordon R. Roseborough
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CA300,862A priority Critical patent/CA1132276A/fr
Application granted granted Critical
Publication of CA1132276A publication Critical patent/CA1132276A/fr
Expired legal-status Critical Current

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
    • H04M1/677—Preventing the dialling or sending of predetermined telephone numbers or selected types of telephone numbers, e.g. long distance numbers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
CA300,862A 1978-04-11 1978-04-11 Dispositif telephonique Expired CA1132276A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA300,862A CA1132276A (fr) 1978-04-11 1978-04-11 Dispositif telephonique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA300,862A CA1132276A (fr) 1978-04-11 1978-04-11 Dispositif telephonique

Publications (1)

Publication Number Publication Date
CA1132276A true CA1132276A (fr) 1982-09-21

Family

ID=4111203

Family Applications (1)

Application Number Title Priority Date Filing Date
CA300,862A Expired CA1132276A (fr) 1978-04-11 1978-04-11 Dispositif telephonique

Country Status (1)

Country Link
CA (1) CA1132276A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985000716A1 (fr) * 1983-07-21 1985-02-14 Malca Pty. Ltd. Dispositif de restriction de ligne telephonique interurbaine
US5200995A (en) * 1990-12-24 1993-04-06 Gaukel John J Universal outgoing call restriction circuit
US5898756A (en) * 1995-10-13 1999-04-27 Zoom Telephonics, Inc. Parallel-connected dialing signal transmission-inhibiting device for data transfer over a telephone link

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985000716A1 (fr) * 1983-07-21 1985-02-14 Malca Pty. Ltd. Dispositif de restriction de ligne telephonique interurbaine
US5200995A (en) * 1990-12-24 1993-04-06 Gaukel John J Universal outgoing call restriction circuit
US5898756A (en) * 1995-10-13 1999-04-27 Zoom Telephonics, Inc. Parallel-connected dialing signal transmission-inhibiting device for data transfer over a telephone link
US6711238B1 (en) 1995-10-13 2004-03-23 Zoom Telephonics, Inc. Parallel-connected dialing signal transmission inhibiting device for data transfer over a telephone link

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Legal Events

Date Code Title Description
MKEX Expiry