JPS5723351A - Signal transmission system - Google Patents

Signal transmission system

Info

Publication number
JPS5723351A
JPS5723351A JP9725380A JP9725380A JPS5723351A JP S5723351 A JPS5723351 A JP S5723351A JP 9725380 A JP9725380 A JP 9725380A JP 9725380 A JP9725380 A JP 9725380A JP S5723351 A JPS5723351 A JP S5723351A
Authority
JP
Japan
Prior art keywords
circuit
gate
inputted
input terminal
case
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
JP9725380A
Other languages
Japanese (ja)
Other versions
JPS6361817B2 (en
Inventor
Sumiyoshi Yoshino
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP9725380A priority Critical patent/JPS5723351A/en
Publication of JPS5723351A publication Critical patent/JPS5723351A/en
Publication of JPS6361817B2 publication Critical patent/JPS6361817B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing

Abstract

PURPOSE:To reduce trouble for checking a disconnection, by transmitting a voltage signal to a receiving circuit from a transmitting circuit, in case the pulse voltage of an oscillating circuit provided on a signal transmission system is not outputted. CONSTITUTION:To an input terminal 28b of an AND gate 28 is always inputted output pulse voltage of an oscillating circuit. On the other hand, in case a signal line 9 has been disconnected, a transmitting circuit 2 is always connected to an electric power source 20, and the circuit 2 transmits at least one output voltage signal to a receiver 8, therefore, H is inputted to an input terminal 28a of the AND gate 28. In case one line 4i among input lines 41-4n has been disconnected, a corresponding light emission diode 23i is not lighted, and H is inputted to the input terminal 28a of the AND gate 28. As a result, the AND gate 28 outputs H, makes a transistor 32 conduct, and drives a disconnection display alarming circuit 11.
JP9725380A 1980-07-15 1980-07-15 Signal transmission system Granted JPS5723351A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9725380A JPS5723351A (en) 1980-07-15 1980-07-15 Signal transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9725380A JPS5723351A (en) 1980-07-15 1980-07-15 Signal transmission system

Publications (2)

Publication Number Publication Date
JPS5723351A true JPS5723351A (en) 1982-02-06
JPS6361817B2 JPS6361817B2 (en) 1988-11-30

Family

ID=14187393

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9725380A Granted JPS5723351A (en) 1980-07-15 1980-07-15 Signal transmission system

Country Status (1)

Country Link
JP (1) JPS5723351A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0247912A (en) * 1988-08-08 1990-02-16 Fuji Facom Corp Filter

Also Published As

Publication number Publication date
JPS6361817B2 (en) 1988-11-30

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