ES383759A1 - Perfeccionamientos introducidos en circuitos para detectar senales de impulsos de discado en una linea telefonica de unsistema telefonico automatico. - Google Patents

Perfeccionamientos introducidos en circuitos para detectar senales de impulsos de discado en una linea telefonica de unsistema telefonico automatico.

Info

Publication number
ES383759A1
ES383759A1 ES383759A ES383759A ES383759A1 ES 383759 A1 ES383759 A1 ES 383759A1 ES 383759 A ES383759 A ES 383759A ES 383759 A ES383759 A ES 383759A ES 383759 A1 ES383759 A1 ES 383759A1
Authority
ES
Spain
Prior art keywords
oscillator
transistor
loop
circuit
line
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
ES383759A
Other languages
English (en)
Spanish (es)
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.)
GNT Automatic AS
Original Assignee
GNT Automatic AS
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 GNT Automatic AS filed Critical GNT Automatic AS
Publication of ES383759A1 publication Critical patent/ES383759A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of DC pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
ES383759A 1969-09-19 1970-09-18 Perfeccionamientos introducidos en circuitos para detectar senales de impulsos de discado en una linea telefonica de unsistema telefonico automatico. Expired ES383759A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK499869 1969-09-19

Publications (1)

Publication Number Publication Date
ES383759A1 true ES383759A1 (es) 1974-06-01

Family

ID=8138533

Family Applications (1)

Application Number Title Priority Date Filing Date
ES383759A Expired ES383759A1 (es) 1969-09-19 1970-09-18 Perfeccionamientos introducidos en circuitos para detectar senales de impulsos de discado en una linea telefonica de unsistema telefonico automatico.

Country Status (8)

Country Link
AU (1) AU2009270A (de)
BE (1) BE756354A (de)
CH (1) CH518663A (de)
DE (1) DE2046226A1 (de)
ES (1) ES383759A1 (de)
GB (1) GB1253508A (de)
NO (1) NO127597B (de)
ZA (1) ZA706396B (de)

Also Published As

Publication number Publication date
ZA706396B (en) 1971-05-27
GB1253508A (en) 1971-11-17
NO127597B (de) 1973-07-16
BE756354A (fr) 1971-03-18
AU2009270A (en) 1972-03-23
CH518663A (de) 1972-01-31
DE2046226A1 (de) 1971-03-25

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