JPS5762655A - Supervisory system for public telephone set - Google Patents

Supervisory system for public telephone set

Info

Publication number
JPS5762655A
JPS5762655A JP13679480A JP13679480A JPS5762655A JP S5762655 A JPS5762655 A JP S5762655A JP 13679480 A JP13679480 A JP 13679480A JP 13679480 A JP13679480 A JP 13679480A JP S5762655 A JPS5762655 A JP S5762655A
Authority
JP
Japan
Prior art keywords
public telephone
telephone set
processor
prescribed
alarm
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
JP13679480A
Other languages
Japanese (ja)
Inventor
Naruhito Toyonaga
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13679480A priority Critical patent/JPS5762655A/en
Publication of JPS5762655A publication Critical patent/JPS5762655A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/24—Arrangements for supervision, monitoring or testing with provision for checking the normal operation
    • H04M3/248—Arrangements for supervision, monitoring or testing with provision for checking the normal operation for metering arrangements or prepayment telephone systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Prepayment Telephone Systems (AREA)

Abstract

PURPOSE:To issue an alarm to indicate a fault, by regarding a public telephone set related to the public telephone line, where charging pulses are not detected over a prescribed time from the initialization time, as incapable of originating by a public telephone set supervisory device. CONSTITUTION:In a public telephone set supervisory device 5, a scanner 5A scans respective public telephone lines 2 at a prescribed period, and the scanning result is transferred to a processor 5B. The processor 5B analyzes the scanning result from the scanner 5A, and initializes contents of an area of a memory 5C corresponding to a pertinent public telephone set 1 to the initial value each time existence of a charging pulse is detected. In the memory 5C, a prescribed number is subtracted from contents of areas corresponding to respective public telephone sets 1 at a prescribed period by the control of the processor 5B. When the subtraction result becomes 0 after a prescribed time, the processor 5B starts an alarm and indicating circuit 5D, and the circuit 5D issues an alarm to inform a person in charge of maintenance of abnormality.
JP13679480A 1980-10-02 1980-10-02 Supervisory system for public telephone set Pending JPS5762655A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13679480A JPS5762655A (en) 1980-10-02 1980-10-02 Supervisory system for public telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13679480A JPS5762655A (en) 1980-10-02 1980-10-02 Supervisory system for public telephone set

Publications (1)

Publication Number Publication Date
JPS5762655A true JPS5762655A (en) 1982-04-15

Family

ID=15183662

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13679480A Pending JPS5762655A (en) 1980-10-02 1980-10-02 Supervisory system for public telephone set

Country Status (1)

Country Link
JP (1) JPS5762655A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61194967A (en) * 1985-02-23 1986-08-29 Tamura Electric Works Ltd Public telephone set

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61194967A (en) * 1985-02-23 1986-08-29 Tamura Electric Works Ltd Public telephone set

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