GB1511767A - Telephone subscriber line monitoring - Google Patents

Telephone subscriber line monitoring

Info

Publication number
GB1511767A
GB1511767A GB4332276A GB4332276A GB1511767A GB 1511767 A GB1511767 A GB 1511767A GB 4332276 A GB4332276 A GB 4332276A GB 4332276 A GB4332276 A GB 4332276A GB 1511767 A GB1511767 A GB 1511767A
Authority
GB
United Kingdom
Prior art keywords
ringing
loop
condition
detector
closed
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
GB4332276A
Other languages
English (en)
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1511767A publication Critical patent/GB1511767A/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
    • 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)
  • Interface Circuits In Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB4332276A 1975-10-25 1976-10-19 Telephone subscriber line monitoring Expired GB1511767A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752547880 DE2547880C2 (de) 1975-10-25 1975-10-25 Schaltungsanordnung zur Erkennung von Betriebszuständen einer Teilnehmerleitung und zur Rufanschaltung sowie Rufabschaltung in Fernsprechvermittlungsanlagen

Publications (1)

Publication Number Publication Date
GB1511767A true GB1511767A (en) 1978-05-24

Family

ID=5960111

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4332276A Expired GB1511767A (en) 1975-10-25 1976-10-19 Telephone subscriber line monitoring

Country Status (5)

Country Link
BE (1) BE847522R (enExample)
CH (1) CH599734A5 (enExample)
DE (1) DE2547880C2 (enExample)
FR (1) FR2329126A1 (enExample)
GB (1) GB1511767A (enExample)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2911584C2 (de) * 1979-03-23 1981-06-11 Siemens AG, 1000 Berlin und 8000 München Teilnehmeranschlußschaltung mit Erdtastenbetätigungsindikation, hochohmig schaltbarer Speisung und Einrichtung zur Rufsignalerzeugung
DE2911517C2 (de) * 1979-03-23 1981-07-09 Siemens AG, 1000 Berlin und 8000 München Teilnehmeranschlußschaltung mit Erdtasten- und Isolationsfehlerindikation
NL7904429A (nl) * 1979-06-06 1980-12-09 Philips Nv Stroomdetectie-inrichting voor een automatische telefooncentrale.
DE3036686C2 (de) * 1980-09-29 1983-12-01 Siemens AG, 1000 Berlin und 8000 München Teilnehmeranschlußschaltung
DE3036657C2 (de) * 1980-09-29 1985-09-05 Siemens AG, 1000 Berlin und 8000 München Teilnehmeranschlußschaltung für Münzfernsprecher mit Schaltmitteln zur Feststellung der einzelnen zu überwachenden Betriebszustände
DE3141375A1 (de) * 1981-10-17 1983-06-30 Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg Verfahren und schaltungsanordnung zur erfassung von schleifenstromkriterien in einer fernmeldeanlage
DE4003160C2 (de) * 1990-02-03 1995-07-13 Sel Alcatel Ag Schaltungsanordnung zur Rufabschaltung in der Teilnehmerschaltung einer Fernsprecheinrichtung
DE4019365A1 (de) * 1990-06-18 1991-12-19 Philips Patentverwaltung Schaltungsanordnung fuer ein teilnehmergeraet

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL294136A (enExample) * 1962-03-01
DE1919585C3 (de) * 1969-04-17 1974-06-06 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung zum Anruf von mit Tonrufempfängern ausgerüsteten Teilnehmerstellen in Fernmelde-, insbesondere Fernsprechvermittlungsanlagen
DE2230040C3 (de) * 1972-06-20 1978-10-05 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung zur Rufstromsteuerung in automatischen Fernsprechvermittlungsanlagen
FR2193529A5 (enExample) * 1972-07-20 1974-02-15 Jeumont Schneider

Also Published As

Publication number Publication date
BE847522R (fr) 1977-04-22
DE2547880A1 (de) 1977-05-05
FR2329126B1 (enExample) 1982-09-24
CH599734A5 (enExample) 1978-05-31
DE2547880C2 (de) 1981-09-24
FR2329126A1 (fr) 1977-05-20

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee