JPS5574257A - Failure monitor system for public telephone - Google Patents

Failure monitor system for public telephone

Info

Publication number
JPS5574257A
JPS5574257A JP14851278A JP14851278A JPS5574257A JP S5574257 A JPS5574257 A JP S5574257A JP 14851278 A JP14851278 A JP 14851278A JP 14851278 A JP14851278 A JP 14851278A JP S5574257 A JPS5574257 A JP S5574257A
Authority
JP
Japan
Prior art keywords
monitor signal
given
public telephone
lat
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
JP14851278A
Other languages
Japanese (ja)
Inventor
Toshiji Kinoshita
Hitoshi Hayamizu
Shuji Kunii
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.)
Tamura Electric Works Ltd
Original Assignee
Tamura 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 Tamura Electric Works Ltd filed Critical Tamura Electric Works Ltd
Priority to JP14851278A priority Critical patent/JPS5574257A/en
Publication of JPS5574257A publication Critical patent/JPS5574257A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Prepayment Telephone Systems (AREA)

Abstract

PURPOSE:To immediately enable the occurrence of failures at the exchangers due to off-hook of users, by giving the self-diagnosis function and monitor signal transmission function to the public telephone itself and giving the identified display function of failed telephones at the exchanger side. CONSTITUTION:Monitor signal transmitter TR is connected between the line terminals LTB1, LTB2 of the public telephone PTE, and the filter FIL1 blocking the monitor signal to be given to the information circuit is inserted. Further, at the exchanger side EX of the telephone station ST, the filter FIL2 is inserted. PTE and EX are connected with the lines L1 and L2, monitor signal receiver SR is connected to EX and the output is given to the display unit DIS via the latch circuit LAT. Accordingly, when the signal STRI is given with the detection of failure, TR is stared, monitor signal is delivered to EX, and this is received at SR and displayed at DIS. Further, LAT is set with the detection of failure and LAT is reset with the recovery.
JP14851278A 1978-11-30 1978-11-30 Failure monitor system for public telephone Pending JPS5574257A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14851278A JPS5574257A (en) 1978-11-30 1978-11-30 Failure monitor system for public telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14851278A JPS5574257A (en) 1978-11-30 1978-11-30 Failure monitor system for public telephone

Publications (1)

Publication Number Publication Date
JPS5574257A true JPS5574257A (en) 1980-06-04

Family

ID=15454416

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14851278A Pending JPS5574257A (en) 1978-11-30 1978-11-30 Failure monitor system for public telephone

Country Status (1)

Country Link
JP (1) JPS5574257A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH088615B2 (en) * 1989-09-15 1996-01-29 マース．インコーポレィテッド Low power coin operated phone controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH088615B2 (en) * 1989-09-15 1996-01-29 マース．インコーポレィテッド Low power coin operated phone controller

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