JPS5521617A - Generation circuit of transfer signal - Google Patents

Generation circuit of transfer signal

Info

Publication number
JPS5521617A
JPS5521617A JP9424578A JP9424578A JPS5521617A JP S5521617 A JPS5521617 A JP S5521617A JP 9424578 A JP9424578 A JP 9424578A JP 9424578 A JP9424578 A JP 9424578A JP S5521617 A JPS5521617 A JP S5521617A
Authority
JP
Japan
Prior art keywords
circuit
generation circuit
station
reception
failure
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
JP9424578A
Other languages
Japanese (ja)
Inventor
Tsugio Miwa
Masao Kodama
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 JP9424578A priority Critical patent/JPS5521617A/en
Publication of JPS5521617A publication Critical patent/JPS5521617A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To establish the transfer signal generation circuit of small size and high reliability, by making the circuit with solidstate constitution, through the use of semiconductor logic circuit elements such as astable multivibrator, monomultivibrator and switching elements. CONSTITUTION:When a failure in the reception line is detected at the reception station having multiplex carrier telephne terminal station unit, the input of the frequency generation circuit 3 is grounded. The frequency generation circuit 3 having astable multivibrator is oscillated at the rectangular wave of the fundamental frequency to trigger the pulse width adjusting circuit 4 having the monostable multivibrator at the next stage resulting in being set to the specified pulse width, and the transfer signal is transmitted by using the transmission line of the reception station by turning ON and OFF the switching circuit 5 including the relay. Further, the display of the failure is made to the reception side of the transmission station to inform the cause to the failure on the transmission line at the transmission station.
JP9424578A 1978-08-01 1978-08-01 Generation circuit of transfer signal Pending JPS5521617A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9424578A JPS5521617A (en) 1978-08-01 1978-08-01 Generation circuit of transfer signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9424578A JPS5521617A (en) 1978-08-01 1978-08-01 Generation circuit of transfer signal

Publications (1)

Publication Number Publication Date
JPS5521617A true JPS5521617A (en) 1980-02-15

Family

ID=14104916

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9424578A Pending JPS5521617A (en) 1978-08-01 1978-08-01 Generation circuit of transfer signal

Country Status (1)

Country Link
JP (1) JPS5521617A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6317350U (en) * 1986-07-18 1988-02-04

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6317350U (en) * 1986-07-18 1988-02-04

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