JPS5723359A - Call duration display system of public telephone - Google Patents

Call duration display system of public telephone

Info

Publication number
JPS5723359A
JPS5723359A JP9703180A JP9703180A JPS5723359A JP S5723359 A JPS5723359 A JP S5723359A JP 9703180 A JP9703180 A JP 9703180A JP 9703180 A JP9703180 A JP 9703180A JP S5723359 A JPS5723359 A JP S5723359A
Authority
JP
Japan
Prior art keywords
call
call duration
coin
subtraction
register
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
JP9703180A
Other languages
Japanese (ja)
Inventor
Masayoshi Ishimura
Kazuo Shiraishi
Kiyokaze Nakamura
Minehiko Oya
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP9703180A priority Critical patent/JPS5723359A/en
Publication of JPS5723359A publication Critical patent/JPS5723359A/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
    • 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)
  • Meter Arrangements (AREA)
  • Prepayment Telephone Systems (AREA)

Abstract

PURPOSE:To easily adjust proceeding of a call and forecast a time for additionally throwing in a coin, by visibly displaying a remaining call duration which is decreased as a call time elapses. CONSTITUTION:A call time calculation part 37 calculates a call duration of the product which is obtained by multiplying both a unit charge multiple value (m) of a register, and a charging pulse internal tm of a register 36, and provides it to a call time subtraction part 38. A timer 40 provides a subtraction signal to the subtraction part 38 at every specific time in order to execute a subtraction of a call duration, an output of the subtraction part 38 is provided to a display part 39, and a remaining call duration is displayed. In this case, when a coin is received by a coin collector 24 in accordance with a charging pulse, the number of coins of a coin storage part 21 is decreased, therefore, contents of the register 34 are also updated. In the same way, in case a coin has been thrown in additionally, the contents of the register are updated, and display contents of a remaining call duration are also varied.
JP9703180A 1980-07-16 1980-07-16 Call duration display system of public telephone Pending JPS5723359A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9703180A JPS5723359A (en) 1980-07-16 1980-07-16 Call duration display system of public telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9703180A JPS5723359A (en) 1980-07-16 1980-07-16 Call duration display system of public telephone

Publications (1)

Publication Number Publication Date
JPS5723359A true JPS5723359A (en) 1982-02-06

Family

ID=14181091

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9703180A Pending JPS5723359A (en) 1980-07-16 1980-07-16 Call duration display system of public telephone

Country Status (1)

Country Link
JP (1) JPS5723359A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6146661A (en) * 1984-08-13 1986-03-06 Anritsu Corp Public telephone set
JPH0515559U (en) * 1991-01-17 1993-02-26 アンリツ株式会社 Public telephone
JPH0568165U (en) * 1992-02-18 1993-09-10 日通工株式会社 Telephone with telephone service monitoring function

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6146661A (en) * 1984-08-13 1986-03-06 Anritsu Corp Public telephone set
JPH0515559U (en) * 1991-01-17 1993-02-26 アンリツ株式会社 Public telephone
JPH0568165U (en) * 1992-02-18 1993-09-10 日通工株式会社 Telephone with telephone service monitoring function

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