JPS56117492A - Answer monitor circuit - Google Patents

Answer monitor circuit

Info

Publication number
JPS56117492A
JPS56117492A JP2059580A JP2059580A JPS56117492A JP S56117492 A JPS56117492 A JP S56117492A JP 2059580 A JP2059580 A JP 2059580A JP 2059580 A JP2059580 A JP 2059580A JP S56117492 A JPS56117492 A JP S56117492A
Authority
JP
Japan
Prior art keywords
resistance
transistor
circuit
same time
plus
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.)
Granted
Application number
JP2059580A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6228913B2 (enrdf_load_stackoverflow
Inventor
Shige Miyoshi
Takeshi Sanbe
Takehiko Tsutsumi
Masami Miura
Michio Takahashi
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
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
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 Fujitsu Ltd, Hitachi Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP2059580A priority Critical patent/JPS56117492A/ja
Publication of JPS56117492A publication Critical patent/JPS56117492A/ja
Publication of JPS6228913B2 publication Critical patent/JPS6228913B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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)
  • Meter Arrangements (AREA)
  • Interface Circuits In Exchanges (AREA)
JP2059580A 1980-02-22 1980-02-22 Answer monitor circuit Granted JPS56117492A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2059580A JPS56117492A (en) 1980-02-22 1980-02-22 Answer monitor circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2059580A JPS56117492A (en) 1980-02-22 1980-02-22 Answer monitor circuit

Publications (2)

Publication Number Publication Date
JPS56117492A true JPS56117492A (en) 1981-09-14
JPS6228913B2 JPS6228913B2 (enrdf_load_stackoverflow) 1987-06-23

Family

ID=12031609

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2059580A Granted JPS56117492A (en) 1980-02-22 1980-02-22 Answer monitor circuit

Country Status (1)

Country Link
JP (1) JPS56117492A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0459665U (enrdf_load_stackoverflow) * 1990-10-01 1992-05-21

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0459665U (enrdf_load_stackoverflow) * 1990-10-01 1992-05-21

Also Published As

Publication number Publication date
JPS6228913B2 (enrdf_load_stackoverflow) 1987-06-23

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