FR2121457B1 - - Google Patents

Info

Publication number
FR2121457B1
FR2121457B1 FR7101202A FR7101202A FR2121457B1 FR 2121457 B1 FR2121457 B1 FR 2121457B1 FR 7101202 A FR7101202 A FR 7101202A FR 7101202 A FR7101202 A FR 7101202A FR 2121457 B1 FR2121457 B1 FR 2121457B1
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
FR7101202A
Other languages
French (fr)
Other versions
FR2121457A1 (enExample
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to FR7101202A priority Critical patent/FR2121457B1/fr
Publication of FR2121457A1 publication Critical patent/FR2121457A1/fr
Application granted granted Critical
Publication of FR2121457B1 publication Critical patent/FR2121457B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR7101202A 1971-01-14 1971-01-14 Expired FR2121457B1 (enExample)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7101202A FR2121457B1 (enExample) 1971-01-14 1971-01-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7101202A FR2121457B1 (enExample) 1971-01-14 1971-01-14

Publications (2)

Publication Number Publication Date
FR2121457A1 FR2121457A1 (enExample) 1972-08-25
FR2121457B1 true FR2121457B1 (enExample) 1975-01-17

Family

ID=9070301

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7101202A Expired FR2121457B1 (enExample) 1971-01-14 1971-01-14

Country Status (1)

Country Link
FR (1) FR2121457B1 (enExample)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1437779A (fr) * 1964-04-24 1966-05-06 Siemens Ag Montage pour contrôler des lignes de signalisation dans des installations de télécommunication, et en particulier de téléphonie

Also Published As

Publication number Publication date
FR2121457A1 (enExample) 1972-08-25

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Legal Events

Date Code Title Description
ST Notification of lapse