JPS5295904A - Inhouse line monitor circuit - Google Patents

Inhouse line monitor circuit

Info

Publication number
JPS5295904A
JPS5295904A JP1220476A JP1220476A JPS5295904A JP S5295904 A JPS5295904 A JP S5295904A JP 1220476 A JP1220476 A JP 1220476A JP 1220476 A JP1220476 A JP 1220476A JP S5295904 A JPS5295904 A JP S5295904A
Authority
JP
Japan
Prior art keywords
inhouse
monitor circuit
line monitor
telephones
shortened
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.)
Pending
Application number
JP1220476A
Other languages
Japanese (ja)
Inventor
Kazunori Fujita
Hiroo Iijima
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
NEC Corp
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP1220476A priority Critical patent/JPS5295904A/en
Publication of JPS5295904A publication Critical patent/JPS5295904A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:By detecting the conditions of communication current circuit, the condition detection time of inhouse telephones is shortened and the instrumentation space is saved.
JP1220476A 1976-02-09 1976-02-09 Inhouse line monitor circuit Pending JPS5295904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1220476A JPS5295904A (en) 1976-02-09 1976-02-09 Inhouse line monitor circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1220476A JPS5295904A (en) 1976-02-09 1976-02-09 Inhouse line monitor circuit

Publications (1)

Publication Number Publication Date
JPS5295904A true JPS5295904A (en) 1977-08-12

Family

ID=11798858

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1220476A Pending JPS5295904A (en) 1976-02-09 1976-02-09 Inhouse line monitor circuit

Country Status (1)

Country Link
JP (1) JPS5295904A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112710A (en) * 1974-07-22 1976-01-31 Tokyo Shibaura Electric Co KANYUSHAKAISEN JOTAIKENSHUTSUSOCHI

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112710A (en) * 1974-07-22 1976-01-31 Tokyo Shibaura Electric Co KANYUSHAKAISEN JOTAIKENSHUTSUSOCHI

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