ES476875A1 - Ringing circuit for centrally controlled telephone exchange junction - has alternating signal source, and bipolar electronic switch output connected to subscriber and timer - Google Patents

Ringing circuit for centrally controlled telephone exchange junction - has alternating signal source, and bipolar electronic switch output connected to subscriber and timer

Info

Publication number
ES476875A1
ES476875A1 ES476875A ES476875A ES476875A1 ES 476875 A1 ES476875 A1 ES 476875A1 ES 476875 A ES476875 A ES 476875A ES 476875 A ES476875 A ES 476875A ES 476875 A1 ES476875 A1 ES 476875A1
Authority
ES
Spain
Prior art keywords
signal source
alternating signal
ringing circuit
electronic switch
subscriber
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
ES476875A
Other languages
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Publication of ES476875A1 publication Critical patent/ES476875A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/026—Arrangements for interrupting the ringing current

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

The ringing circuit is designed to present to a called subscriber a continuous call tone followed by a discontinuous call tone. The ringing circuit has an alternating signal source and a first bipolar electronic switch fitted with two input terminals. The input terminals are supplied from the alternating signal source. Its two output terminals are connected to the called subscribers line and to a control terminal fed by a timing signal generator. The signal generator is controlled by the central control unit.
ES476875A 1978-01-17 1979-01-16 Ringing circuit for centrally controlled telephone exchange junction - has alternating signal source, and bipolar electronic switch output connected to subscriber and timer Expired ES476875A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7801170A FR2423096A1 (en) 1978-01-17 1978-01-17 Ringing circuit for centrally controlled telephone exchange junction - has alternating signal source, and bipolar electronic switch output connected to subscriber and timer

Publications (1)

Publication Number Publication Date
ES476875A1 true ES476875A1 (en) 1979-05-16

Family

ID=9203528

Family Applications (1)

Application Number Title Priority Date Filing Date
ES476875A Expired ES476875A1 (en) 1978-01-17 1979-01-16 Ringing circuit for centrally controlled telephone exchange junction - has alternating signal source, and bipolar electronic switch output connected to subscriber and timer

Country Status (5)

Country Link
BE (1) BE873499A (en)
DE (1) DE2901739A1 (en)
ES (1) ES476875A1 (en)
FR (1) FR2423096A1 (en)
IT (1) IT1111760B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
YU39444B (en) * 1979-09-07 1984-12-31 Iskra Sozd Elektro Indus Subschribes circuit for domestic electronic telephone exchangers
IT1128374B (en) * 1980-02-19 1986-05-28 Cselt Centro Studi Lab Telecom TELEPHONE CIRCUIT FOR THE GENERATION OF THE RINGTONE RHYTHM AND THE DETECTION OF THE RELEASE
US4349703A (en) * 1980-03-31 1982-09-14 International Telephone And Telegraph Corporation Programmable ring signal generator
DE3036686C2 (en) * 1980-09-29 1983-12-01 Siemens AG, 1000 Berlin und 8000 München Subscriber line circuit
DE3141375A1 (en) * 1981-10-17 1983-06-30 Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg METHOD AND CIRCUIT ARRANGEMENT FOR DETECTING LOOP CURRENT CRITERIA IN A TELECOMMUNICATION SYSTEM

Also Published As

Publication number Publication date
IT1111760B (en) 1986-01-13
DE2901739A1 (en) 1979-07-19
BE873499A (en) 1979-05-16
FR2423096B1 (en) 1981-10-16
FR2423096A1 (en) 1979-11-09
IT7919275A0 (en) 1979-01-15

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