FR2317831B1 - - Google Patents

Info

Publication number
FR2317831B1
FR2317831B1 FR7521889A FR7521889A FR2317831B1 FR 2317831 B1 FR2317831 B1 FR 2317831B1 FR 7521889 A FR7521889 A FR 7521889A FR 7521889 A FR7521889 A FR 7521889A FR 2317831 B1 FR2317831 B1 FR 2317831B1
Authority
FR
France
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
FR7521889A
Other languages
French (fr)
Other versions
FR2317831A1 (fr
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.)
Telecommunications Radioelectriques et Telephoniques SA TRT
Original Assignee
Telecommunications Radioelectriques et Telephoniques SA TRT
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 Telecommunications Radioelectriques et Telephoniques SA TRT filed Critical Telecommunications Radioelectriques et Telephoniques SA TRT
Priority to FR7521889A priority Critical patent/FR2317831A1/fr
Publication of FR2317831A1 publication Critical patent/FR2317831A1/fr
Application granted granted Critical
Publication of FR2317831B1 publication Critical patent/FR2317831B1/fr
Granted 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
    • H04M1/82—Line monitoring circuits for call progress or status discrimination

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
FR7521889A 1975-07-11 1975-07-11 Detecteur de courant d'appel telephonique Granted FR2317831A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7521889A FR2317831A1 (fr) 1975-07-11 1975-07-11 Detecteur de courant d'appel telephonique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7521889A FR2317831A1 (fr) 1975-07-11 1975-07-11 Detecteur de courant d'appel telephonique

Publications (2)

Publication Number Publication Date
FR2317831A1 FR2317831A1 (fr) 1977-02-04
FR2317831B1 true FR2317831B1 (enExample) 1980-08-08

Family

ID=9157851

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7521889A Granted FR2317831A1 (fr) 1975-07-11 1975-07-11 Detecteur de courant d'appel telephonique

Country Status (1)

Country Link
FR (1) FR2317831A1 (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1529452A (en) * 1975-04-10 1978-10-18 Ansafone Ltd Detection of direct currents or voltages
US4311879A (en) * 1980-06-02 1982-01-19 Gte Automatic Electric Labs Inc. AC Supervisory signal detector circuit

Also Published As

Publication number Publication date
FR2317831A1 (fr) 1977-02-04

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Legal Events

Date Code Title Description
DR Decision of the appeal court due to an appeal at law against decisions of the director of the inpi, except decision of lapse
ST Notification of lapse