CA1230438A - Excluder device for telephones installed in parallel - Google Patents

Excluder device for telephones installed in parallel

Info

Publication number
CA1230438A
CA1230438A CA000476309A CA476309A CA1230438A CA 1230438 A CA1230438 A CA 1230438A CA 000476309 A CA000476309 A CA 000476309A CA 476309 A CA476309 A CA 476309A CA 1230438 A CA1230438 A CA 1230438A
Authority
CA
Canada
Prior art keywords
telephone
terminals
thyristor
pair
bridge rectifier
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
CA000476309A
Other languages
English (en)
French (fr)
Inventor
Antonio Lopez Garcia
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.)
Amper SA
Original Assignee
Amper 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 Amper SA filed Critical Amper SA
Application granted granted Critical
Publication of CA1230438A publication Critical patent/CA1230438A/en
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
    • H04M1/68—Circuit arrangements for preventing eavesdropping
    • H04M1/70—Lock-out or secrecy arrangements in party-line systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Emergency Protection Circuit Devices (AREA)
CA000476309A 1984-11-12 1985-03-12 Excluder device for telephones installed in parallel Expired CA1230438A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES282.513 1984-11-12
ES1984282513U ES282513Y (es) 1984-11-12 1984-11-12 Dispositivo exclusor para telefonos instalados en paralelo

Publications (1)

Publication Number Publication Date
CA1230438A true CA1230438A (en) 1987-12-15

Family

ID=8432815

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000476309A Expired CA1230438A (en) 1984-11-12 1985-03-12 Excluder device for telephones installed in parallel

Country Status (8)

Country Link
EP (1) EP0182393A3 (enEXAMPLES)
AU (1) AU572959B2 (enEXAMPLES)
BR (1) BR8501351A (enEXAMPLES)
CA (1) CA1230438A (enEXAMPLES)
ES (1) ES282513Y (enEXAMPLES)
GR (1) GR850967B (enEXAMPLES)
MX (1) MX156924A (enEXAMPLES)
PT (1) PT80026B (enEXAMPLES)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5066760A (en) * 1989-07-13 1991-11-19 Lenzing Aktiengesellschaft Mixed polyimides and process for preparing them

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63217758A (ja) * 1987-03-05 1988-09-09 Nec Corp 分岐電話機
IT1219764B (it) * 1988-06-29 1990-05-24 Cselt Centro Studi Lab Telecom Dispositivo per l'uso esclusivo di una singola linea telefonica da parte di un telefono in impianti dotati di una molteplicita di telefoni
GB8903268D0 (en) * 1989-02-14 1989-04-05 Cts Trading Co Ltd Communication apparatus
NO991801L (no) 1999-04-15 2000-10-16 Ericsson Telefon Ab L M FremgangsmÕte for forbedring av et telefonsystem

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7809628A (nl) * 1978-09-21 1980-03-25 Nederlanden Staat Schakeling voor multipel aangesloten telefoontoestel- len.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5066760A (en) * 1989-07-13 1991-11-19 Lenzing Aktiengesellschaft Mixed polyimides and process for preparing them

Also Published As

Publication number Publication date
BR8501351A (pt) 1986-10-14
ES282513U (es) 1986-03-16
EP0182393A2 (en) 1986-05-28
PT80026B (en) 1986-10-28
EP0182393A3 (en) 1987-09-30
AU3872785A (en) 1986-05-22
AU572959B2 (en) 1988-05-19
GR850967B (enEXAMPLES) 1985-11-25
MX156924A (es) 1988-10-14
PT80026A (en) 1985-03-01
ES282513Y (es) 1986-10-01

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Legal Events

Date Code Title Description
MKEX Expiry