JPS57188172A - Urging signal transmission controller for public telephone set - Google Patents

Urging signal transmission controller for public telephone set

Info

Publication number
JPS57188172A
JPS57188172A JP7391081A JP7391081A JPS57188172A JP S57188172 A JPS57188172 A JP S57188172A JP 7391081 A JP7391081 A JP 7391081A JP 7391081 A JP7391081 A JP 7391081A JP S57188172 A JPS57188172 A JP S57188172A
Authority
JP
Japan
Prior art keywords
signal
circuit
urging
telephone set
output
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
JP7391081A
Other languages
Japanese (ja)
Other versions
JPS6411190B2 (en
Inventor
Shigeyasu Tanaka
Takao Saito
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.)
Anritsu Corp
Original Assignee
Anritsu 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 Anritsu Corp filed Critical Anritsu Corp
Priority to JP7391081A priority Critical patent/JPS57188172A/en
Publication of JPS57188172A publication Critical patent/JPS57188172A/en
Publication of JPS6411190B2 publication Critical patent/JPS6411190B2/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 avoid the transmittion of an urging signal in case of limitless short distance call in a public telephone set. CONSTITUTION:With a dial signal from a public telephone set 5, a signal corresponding to charaging signal is incoming from an exchanger 2 to a call line 7a in case of a long distance call. When a signal reception circuit 12 receives this signal, output is given to a discrimination circuit 14 and a gate circuit 15. Since no polarity inversion is made before the response of a called party, no output is given from a line polarity detection circuit 13, but when a charging signal is transmitted after the response, since the circuit 13 causes an output, the charging signal is given to an urging signal detection circuit 16 through the gate circuit 15, and when the residual is lower than the one call's share, an urging signal is transmitted. In case of a limitless short distance call, since no signal corresponding to the charging signal before the polarity inversion is incoming, no output is produced from the circuit 14 and no urging signal is transmitted even if a charging pulse is incoming after the response of the called party.
JP7391081A 1981-05-15 1981-05-15 Urging signal transmission controller for public telephone set Granted JPS57188172A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7391081A JPS57188172A (en) 1981-05-15 1981-05-15 Urging signal transmission controller for public telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7391081A JPS57188172A (en) 1981-05-15 1981-05-15 Urging signal transmission controller for public telephone set

Publications (2)

Publication Number Publication Date
JPS57188172A true JPS57188172A (en) 1982-11-19
JPS6411190B2 JPS6411190B2 (en) 1989-02-23

Family

ID=13531799

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7391081A Granted JPS57188172A (en) 1981-05-15 1981-05-15 Urging signal transmission controller for public telephone set

Country Status (1)

Country Link
JP (1) JPS57188172A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08276093A (en) * 1995-04-05 1996-10-22 Obane Hikaku Kk Washing jig

Also Published As

Publication number Publication date
JPS6411190B2 (en) 1989-02-23

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