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JPS5797763A - Control system for public telephone set - Google Patents

Control system for public telephone set

Info

Publication number
JPS5797763A
JPS5797763A JP17439480A JP17439480A JPS5797763A JP S5797763 A JPS5797763 A JP S5797763A JP 17439480 A JP17439480 A JP 17439480A JP 17439480 A JP17439480 A JP 17439480A JP S5797763 A JPS5797763 A JP S5797763A
Authority
JP
Japan
Prior art keywords
dial
charge
stored
dial number
coincide
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
JP17439480A
Other languages
Japanese (ja)
Other versions
JPS6339182B2 (en
Inventor
Takashi Oyamada
Toshiji Kinoshita
Yoshiaki Takeda
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 JP17439480A priority Critical patent/JPS5797763A/en
Publication of JPS5797763A publication Critical patent/JPS5797763A/en
Publication of JPS6339182B2 publication Critical patent/JPS6339182B2/ja
Granted 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
    • H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
    • H04M17/023—Circuit arrangements

Landscapes

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

Abstract

PURPOSE:To use a public telephone set of the charging system more widely, by comparing a dial number with a charge-free number, which is stored in a memory preliminarily, when it is discriminated by a self-diagnostic processing that the call system is not faulty, then making service possible when they coincide with each other. CONSTITUTION:A dial control circuit DCT controls dialing in accordance with a status signal ST and a number DN and stores respective digits of the dial number in respective addresses of a variable memory RAM. A specific dial number, respective digits of which are stored in respective addresses of a fixed memory ROM preliminarily, and the dial number stored in the memory RAM are read out and are compared with each other. If they coincide with each other, respective flags are set in accordance with a count value of the group counter in a control part CPU registered for every group of specific dial numbers. Consequently, when the count value of the group counter is 0 and a flag for no-charge number is set, a charge-free call is permitted.
JP17439480A 1980-12-10 1980-12-10 Control system for public telephone set Granted JPS5797763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17439480A JPS5797763A (en) 1980-12-10 1980-12-10 Control system for public telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17439480A JPS5797763A (en) 1980-12-10 1980-12-10 Control system for public telephone set

Publications (2)

Publication Number Publication Date
JPS5797763A true JPS5797763A (en) 1982-06-17
JPS6339182B2 JPS6339182B2 (en) 1988-08-03

Family

ID=15977817

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17439480A Granted JPS5797763A (en) 1980-12-10 1980-12-10 Control system for public telephone set

Country Status (1)

Country Link
JP (1) JPS5797763A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0169507A2 (en) * 1984-07-27 1986-01-29 URMET S.p.A. Costruzioni Elettro-Telefoniche Telephone set for public use having a integral management microprocessor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0169507A2 (en) * 1984-07-27 1986-01-29 URMET S.p.A. Costruzioni Elettro-Telefoniche Telephone set for public use having a integral management microprocessor

Also Published As

Publication number Publication date
JPS6339182B2 (en) 1988-08-03

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