MX156924A - Mejoras en dispositivo exclusor para telefonos instalados en paralelo - Google Patents

Mejoras en dispositivo exclusor para telefonos instalados en paralelo

Info

Publication number
MX156924A
MX156924A MX204354A MX20435485A MX156924A MX 156924 A MX156924 A MX 156924A MX 204354 A MX204354 A MX 204354A MX 20435485 A MX20435485 A MX 20435485A MX 156924 A MX156924 A MX 156924A
Authority
MX
Mexico
Prior art keywords
parallel
exclusive device
phones
installed phones
exclusive
Prior art date
Application number
MX204354A
Other languages
English (en)
Inventor
Antonio Lopez Garcia
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
Publication of MX156924A publication Critical patent/MX156924A/es

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)
MX204354A 1984-11-12 1985-02-18 Mejoras en dispositivo exclusor para telefonos instalados en paralelo MX156924A (es)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
MX156924A true MX156924A (es) 1988-10-14

Family

ID=8432815

Family Applications (1)

Application Number Title Priority Date Filing Date
MX204354A MX156924A (es) 1984-11-12 1985-02-18 Mejoras en dispositivo exclusor para telefonos instalados en paralelo

Country Status (8)

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

Families Citing this family (5)

* 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
AT392974B (de) * 1989-07-13 1991-07-25 Chemiefaser Lenzing Ag Mischpolyimide sowie verfahren zu ihrer herstellung
NO991801L (no) 1999-04-15 2000-10-16 Ericsson Telefon Ab L M FremgangsmÕte for forbedring av et telefonsystem

Family Cites Families (3)

* 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.
JPS5553950A (en) * 1978-10-18 1980-04-19 Hachishiro Kawamura Multi-telephone device
JPS607255A (ja) * 1983-06-27 1985-01-16 Kanda Tsushin Kogyo Kk 秘話機能付親子電話装置

Also Published As

Publication number Publication date
ES282513U (es) 1986-03-16
EP0182393A2 (en) 1986-05-28
EP0182393A3 (en) 1987-09-30
PT80026A (en) 1985-03-01
PT80026B (en) 1986-10-28
BR8501351A (pt) 1986-10-14
AU572959B2 (en) 1988-05-19
CA1230438A (en) 1987-12-15
GR850967B (es) 1985-11-25
AU3872785A (en) 1986-05-22
ES282513Y (es) 1986-10-01

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