CA1201229A - Detection de conditions de declenchement par la terre dans un circuit de signalisation telephonique - Google Patents

Detection de conditions de declenchement par la terre dans un circuit de signalisation telephonique

Info

Publication number
CA1201229A
CA1201229A CA000451895A CA451895A CA1201229A CA 1201229 A CA1201229 A CA 1201229A CA 000451895 A CA000451895 A CA 000451895A CA 451895 A CA451895 A CA 451895A CA 1201229 A CA1201229 A CA 1201229A
Authority
CA
Canada
Prior art keywords
line
loop
detector
ground
output
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
CA000451895A
Other languages
English (en)
Inventor
Puran S. Kasbia
Yuan-Lu Li
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to CA000451895A priority Critical patent/CA1201229A/fr
Application granted granted Critical
Publication of CA1201229A publication Critical patent/CA1201229A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
CA000451895A 1984-04-12 1984-04-12 Detection de conditions de declenchement par la terre dans un circuit de signalisation telephonique Expired CA1201229A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA000451895A CA1201229A (fr) 1984-04-12 1984-04-12 Detection de conditions de declenchement par la terre dans un circuit de signalisation telephonique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000451895A CA1201229A (fr) 1984-04-12 1984-04-12 Detection de conditions de declenchement par la terre dans un circuit de signalisation telephonique

Publications (1)

Publication Number Publication Date
CA1201229A true CA1201229A (fr) 1986-02-25

Family

ID=4127647

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000451895A Expired CA1201229A (fr) 1984-04-12 1984-04-12 Detection de conditions de declenchement par la terre dans un circuit de signalisation telephonique

Country Status (1)

Country Link
CA (1) CA1201229A (fr)

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Legal Events

Date Code Title Description
MKEX Expiry