BE847522R - SUBSCRIBER LINE STATUS DETECTION CIRCUIT IN TELEPHONE SWITCHING SYSTEMS, - Google Patents

SUBSCRIBER LINE STATUS DETECTION CIRCUIT IN TELEPHONE SWITCHING SYSTEMS,

Info

Publication number
BE847522R
BE847522R BE2055391A BE2055391A BE847522R BE 847522 R BE847522 R BE 847522R BE 2055391 A BE2055391 A BE 2055391A BE 2055391 A BE2055391 A BE 2055391A BE 847522 R BE847522 R BE 847522R
Authority
BE
Belgium
Prior art keywords
detection circuit
subscriber line
status detection
line status
telephone switching
Prior art date
Application number
BE2055391A
Other languages
French (fr)
Inventor
G Fink
W Zimmer
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 filed Critical
Application granted granted Critical
Publication of BE847522R publication Critical patent/BE847522R/en

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
BE2055391A 1975-10-25 1976-10-22 SUBSCRIBER LINE STATUS DETECTION CIRCUIT IN TELEPHONE SWITCHING SYSTEMS, BE847522R (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752547880 DE2547880C2 (en) 1975-10-25 1975-10-25 Circuit arrangement for recognizing the operating states of a subscriber line and for connecting and disabling calls in telephone exchanges

Publications (1)

Publication Number Publication Date
BE847522R true BE847522R (en) 1977-04-22

Family

ID=5960111

Family Applications (1)

Application Number Title Priority Date Filing Date
BE2055391A BE847522R (en) 1975-10-25 1976-10-22 SUBSCRIBER LINE STATUS DETECTION CIRCUIT IN TELEPHONE SWITCHING SYSTEMS,

Country Status (5)

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

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2911517C2 (en) * 1979-03-23 1981-07-09 Siemens AG, 1000 Berlin und 8000 München Subscriber connection circuit with earth button and insulation fault indication
DE2911584C2 (en) * 1979-03-23 1981-06-11 Siemens AG, 1000 Berlin und 8000 München Subscriber connection circuit with earth button actuation indication, high-resistance switchable supply and device for generating call signals
NL7904429A (en) * 1979-06-06 1980-12-09 Philips Nv FLOW DETECTION DEVICE FOR AN AUTOMATIC TELEPHONE CONTROL PANEL.
DE3036686C2 (en) * 1980-09-29 1983-12-01 Siemens AG, 1000 Berlin und 8000 München Subscriber line circuit
DE3036657C2 (en) * 1980-09-29 1985-09-05 Siemens AG, 1000 Berlin und 8000 München Subscriber connection circuit for coin-operated telephones with switching means for determining the individual operating states to be monitored
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
DE4003160C2 (en) * 1990-02-03 1995-07-13 Sel Alcatel Ag Circuit arrangement for call disconnection in the subscriber circuit of a telephone device
DE4019365A1 (en) * 1990-06-18 1991-12-19 Philips Patentverwaltung CIRCUIT ARRANGEMENT FOR A SUBSCRIBER DEVICE

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE624790A (en) * 1962-03-01
DE1919585C3 (en) * 1969-04-17 1974-06-06 Standard Elektrik Lorenz Ag, 7000 Stuttgart Circuit arrangement for calling subscriber stations equipped with ringer receivers in telecommunication systems, in particular telephone switching systems
DE2230040C3 (en) * 1972-06-20 1978-10-05 Siemens Ag, 1000 Berlin Und 8000 Muenchen Circuit arrangement for ringing current control in automatic telephone exchange systems
FR2193529A5 (en) * 1972-07-20 1974-02-15 Jeumont Schneider

Also Published As

Publication number Publication date
FR2329126A1 (en) 1977-05-20
DE2547880C2 (en) 1981-09-24
GB1511767A (en) 1978-05-24
FR2329126B1 (en) 1982-09-24
CH599734A5 (en) 1978-05-31
DE2547880A1 (en) 1977-05-05

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: ALCATEL N.V.

Effective date: 19900930