JPS6232860B2 - - Google Patents

Info

Publication number
JPS6232860B2
JPS6232860B2 JP15770079A JP15770079A JPS6232860B2 JP S6232860 B2 JPS6232860 B2 JP S6232860B2 JP 15770079 A JP15770079 A JP 15770079A JP 15770079 A JP15770079 A JP 15770079A JP S6232860 B2 JPS6232860 B2 JP S6232860B2
Authority
JP
Japan
Prior art keywords
terminal
circuit
relay
input
voltage
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
JP15770079A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5680952A (en
Inventor
Kunio Nagashima
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.)
NEC Corp
Original Assignee
Nippon Electric Co 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 Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP15770079A priority Critical patent/JPS5680952A/ja
Publication of JPS5680952A publication Critical patent/JPS5680952A/ja
Publication of JPS6232860B2 publication Critical patent/JPS6232860B2/ja
Granted 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
    • H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of DC pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
JP15770079A 1979-12-05 1979-12-05 Subscriber monitoring circuit Granted JPS5680952A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15770079A JPS5680952A (en) 1979-12-05 1979-12-05 Subscriber monitoring circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15770079A JPS5680952A (en) 1979-12-05 1979-12-05 Subscriber monitoring circuit

Publications (2)

Publication Number Publication Date
JPS5680952A JPS5680952A (en) 1981-07-02
JPS6232860B2 true JPS6232860B2 (en]) 1987-07-17

Family

ID=15655458

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15770079A Granted JPS5680952A (en) 1979-12-05 1979-12-05 Subscriber monitoring circuit

Country Status (1)

Country Link
JP (1) JPS5680952A (en])

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1155661B (it) * 1982-03-24 1987-01-28 Cselt Centro Studi Lab Telecom Circuito elettronico per la rivelazione dello sgancio del microtelefono in presenza della corrente di chiamata
JPS6269759A (ja) * 1985-09-20 1987-03-31 Matsushita Electric Ind Co Ltd 電話交換機のオフフツク状態検出回路
JP2803370B2 (ja) * 1991-01-23 1998-09-24 日本電気株式会社 リングトリップ回路

Also Published As

Publication number Publication date
JPS5680952A (en) 1981-07-02

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