JPH0441860B2 - - Google Patents

Info

Publication number
JPH0441860B2
JPH0441860B2 JP60059810A JP5981085A JPH0441860B2 JP H0441860 B2 JPH0441860 B2 JP H0441860B2 JP 60059810 A JP60059810 A JP 60059810A JP 5981085 A JP5981085 A JP 5981085A JP H0441860 B2 JPH0441860 B2 JP H0441860B2
Authority
JP
Japan
Prior art keywords
voltage
line
trunk
inverting input
input terminal
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 - Lifetime
Application number
JP60059810A
Other languages
English (en)
Japanese (ja)
Other versions
JPS61218256A (ja
Inventor
Shigeo Sano
Takashi Tabu
Nobuyuki Masuda
Yoshiaki Nakano
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP5981085A priority Critical patent/JPS61218256A/ja
Publication of JPS61218256A publication Critical patent/JPS61218256A/ja
Publication of JPH0441860B2 publication Critical patent/JPH0441860B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/0096—Trunk circuits
    • 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)
  • Monitoring And Testing Of Exchanges (AREA)
  • Interface Circuits In Exchanges (AREA)
JP5981085A 1985-03-25 1985-03-25 出トランク監視方式 Granted JPS61218256A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5981085A JPS61218256A (ja) 1985-03-25 1985-03-25 出トランク監視方式

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5981085A JPS61218256A (ja) 1985-03-25 1985-03-25 出トランク監視方式

Publications (2)

Publication Number Publication Date
JPS61218256A JPS61218256A (ja) 1986-09-27
JPH0441860B2 true JPH0441860B2 (enrdf_load_stackoverflow) 1992-07-09

Family

ID=13123964

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5981085A Granted JPS61218256A (ja) 1985-03-25 1985-03-25 出トランク監視方式

Country Status (1)

Country Link
JP (1) JPS61218256A (enrdf_load_stackoverflow)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5575367A (en) * 1978-12-01 1980-06-06 Hitachi Ltd Subsequent monitor system
JPS56123160A (en) * 1980-03-04 1981-09-28 Nec Corp Trunk line channel fault monitoring system
JPS58121859A (ja) * 1982-01-14 1983-07-20 Fujitsu Ltd 回線監視回路

Also Published As

Publication number Publication date
JPS61218256A (ja) 1986-09-27

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