JPS63133749A - Line supervisory equipment - Google Patents

Line supervisory equipment

Info

Publication number
JPS63133749A
JPS63133749A JP28009986A JP28009986A JPS63133749A JP S63133749 A JPS63133749 A JP S63133749A JP 28009986 A JP28009986 A JP 28009986A JP 28009986 A JP28009986 A JP 28009986A JP S63133749 A JPS63133749 A JP S63133749A
Authority
JP
Japan
Prior art keywords
line
voltage
terminals
terminal
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.)
Pending
Application number
JP28009986A
Other languages
Japanese (ja)
Inventor
Yukihide Hosoda
Original Assignee
Pioneer Answerphone Mfg Corp
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 Pioneer Answerphone Mfg Corp filed Critical Pioneer Answerphone Mfg Corp
Priority to JP28009986A priority Critical patent/JPS63133749A/en
Publication of JPS63133749A publication Critical patent/JPS63133749A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To allow all terminals connected in parallel to detect anytime the line that the other terminal uses by supervising a voltage between two lines and detecting whether the line is used or not.
CONSTITUTION: When line connection terminals 1a and 1b are connected to the line, a voltage supplied from a station is impressed on the terminals 1a and 1b. Resistances 14a, 14b and 14c divide the voltage, which enters a voltage detection circuit 15. When the terminal connected to the terminals 1a and 1b in parallel closes a loop to use the line, the voltage detection circuit 15 detects a drop in the voltage because the voltage between the terminals 1a and 1b falls, and transmits an output from an output terminal 16. Hence, by supervising the output 16, all the terminals can know whether the line is used or not.
COPYRIGHT: (C)1988,JPO&Japio
JP28009986A 1986-11-25 1986-11-25 Line supervisory equipment Pending JPS63133749A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28009986A JPS63133749A (en) 1986-11-25 1986-11-25 Line supervisory equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28009986A JPS63133749A (en) 1986-11-25 1986-11-25 Line supervisory equipment

Publications (1)

Publication Number Publication Date
JPS63133749A true JPS63133749A (en) 1988-06-06

Family

ID=17620302

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28009986A Pending JPS63133749A (en) 1986-11-25 1986-11-25 Line supervisory equipment

Country Status (1)

Country Link
JP (1) JPS63133749A (en)

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