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JPS5643861A - Public telephone system - Google Patents

Public telephone system

Info

Publication number
JPS5643861A
JPS5643861A JP11914679A JP11914679A JPS5643861A JP S5643861 A JPS5643861 A JP S5643861A JP 11914679 A JP11914679 A JP 11914679A JP 11914679 A JP11914679 A JP 11914679A JP S5643861 A JPS5643861 A JP S5643861A
Authority
JP
Japan
Prior art keywords
yen
coin
reception signal
reception
local unit
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
JP11914679A
Other languages
Japanese (ja)
Other versions
JPS594910B2 (en
Inventor
Yoshio Fujishita
Toshiyasu Muta
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP11914679A priority Critical patent/JPS594910B2/en
Publication of JPS5643861A publication Critical patent/JPS5643861A/en
Publication of JPS594910B2 publication Critical patent/JPS594910B2/en
Expired 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 make it possible to use various coins together by bringing coin reception under the control of a telephone set, by transferring information on the reception of coins to an office, and by adjusting the time of the next coin reception signal transmission according to the information. CONSTITUTION:When a 10-yen coin and 100-yen coin stay at their coin reception setup positions respectively, mechanical contacts 10c and 100c are made. When only the 100-yen coin is set without the 10-yen coin, Zener diode ZD operates oscillator OSC, generating an out-band frequency pulse as a 100-yen reception signal, to send the 100-yen reception signal out to the local unit. Once receiving the 100-yen reception signal, the local unit never sends the next coin reception signal to the telephone set until the calling time of 100 yen passes. When the 10-yen coin is received, the next coil reception signal is set out to the telephone set after the calling time of 10 yen because the local unit never receives the OSC signal of the oscillator during polarity inversion.
JP11914679A 1979-09-17 1979-09-17 Public phone system Expired JPS594910B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11914679A JPS594910B2 (en) 1979-09-17 1979-09-17 Public phone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11914679A JPS594910B2 (en) 1979-09-17 1979-09-17 Public phone system

Publications (2)

Publication Number Publication Date
JPS5643861A true JPS5643861A (en) 1981-04-22
JPS594910B2 JPS594910B2 (en) 1984-02-01

Family

ID=14754050

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11914679A Expired JPS594910B2 (en) 1979-09-17 1979-09-17 Public phone system

Country Status (1)

Country Link
JP (1) JPS594910B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5890951A (en) * 1981-11-26 1983-05-30 住友金属工業株式会社 Laminated board having excellent corrosion-resistant property
JPS58162683A (en) * 1982-03-20 1983-09-27 Yamagata Gravure:Kk Bonding process

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60130313U (en) * 1984-02-08 1985-08-31 シャープ株式会社 oil burner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5890951A (en) * 1981-11-26 1983-05-30 住友金属工業株式会社 Laminated board having excellent corrosion-resistant property
JPS58162683A (en) * 1982-03-20 1983-09-27 Yamagata Gravure:Kk Bonding process

Also Published As

Publication number Publication date
JPS594910B2 (en) 1984-02-01

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