FR2296324A1 - PERFECTED CALL DEVICE FOR TELEPHONY SYSTEMS - Google Patents

PERFECTED CALL DEVICE FOR TELEPHONY SYSTEMS

Info

Publication number
FR2296324A1
FR2296324A1 FR7443182A FR7443182A FR2296324A1 FR 2296324 A1 FR2296324 A1 FR 2296324A1 FR 7443182 A FR7443182 A FR 7443182A FR 7443182 A FR7443182 A FR 7443182A FR 2296324 A1 FR2296324 A1 FR 2296324A1
Authority
FR
France
Prior art keywords
perfected
call device
telephony systems
telephony
systems
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.)
Granted
Application number
FR7443182A
Other languages
French (fr)
Other versions
FR2296324B1 (en
Inventor
Andre Chataignon
Raymond Blaszykowski
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 FR7443182A priority Critical patent/FR2296324A1/en
Publication of FR2296324A1 publication Critical patent/FR2296324A1/en
Application granted granted Critical
Publication of FR2296324B1 publication Critical patent/FR2296324B1/fr
Granted 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)
FR7443182A 1974-12-27 1974-12-27 PERFECTED CALL DEVICE FOR TELEPHONY SYSTEMS Granted FR2296324A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7443182A FR2296324A1 (en) 1974-12-27 1974-12-27 PERFECTED CALL DEVICE FOR TELEPHONY SYSTEMS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7443182A FR2296324A1 (en) 1974-12-27 1974-12-27 PERFECTED CALL DEVICE FOR TELEPHONY SYSTEMS

Publications (2)

Publication Number Publication Date
FR2296324A1 true FR2296324A1 (en) 1976-07-23
FR2296324B1 FR2296324B1 (en) 1977-07-01

Family

ID=9146718

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7443182A Granted FR2296324A1 (en) 1974-12-27 1974-12-27 PERFECTED CALL DEVICE FOR TELEPHONY SYSTEMS

Country Status (1)

Country Link
FR (1) FR2296324A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059058A (en) * 1960-12-23 1962-10-16 Bell Telephone Labor Inc Subscriber line circuit with local ringing
FR1323546A (en) * 1962-01-26 1963-04-12 subscriber line equipment for time division electronic telephone concentrator
FR1408908A (en) * 1964-07-09 1965-08-20 Cit Alcatel Photo-electronic device
FR2131038A5 (en) * 1971-03-30 1972-11-10 Ass Ouvriers Instr Preci
FR2161191A5 (en) * 1971-11-17 1973-07-06 Constr Telephoniques

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3059058A (en) * 1960-12-23 1962-10-16 Bell Telephone Labor Inc Subscriber line circuit with local ringing
FR1323546A (en) * 1962-01-26 1963-04-12 subscriber line equipment for time division electronic telephone concentrator
FR1408908A (en) * 1964-07-09 1965-08-20 Cit Alcatel Photo-electronic device
FR2131038A5 (en) * 1971-03-30 1972-11-10 Ass Ouvriers Instr Preci
FR2161191A5 (en) * 1971-11-17 1973-07-06 Constr Telephoniques

Also Published As

Publication number Publication date
FR2296324B1 (en) 1977-07-01

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Legal Events

Date Code Title Description
ST Notification of lapse