KR890011916U - Power supply circuit for card-type public telephones - Google Patents

Power supply circuit for card-type public telephones

Info

Publication number
KR890011916U
KR890011916U KR2019870019739U KR870019739U KR890011916U KR 890011916 U KR890011916 U KR 890011916U KR 2019870019739 U KR2019870019739 U KR 2019870019739U KR 870019739 U KR870019739 U KR 870019739U KR 890011916 U KR890011916 U KR 890011916U
Authority
KR
South Korea
Prior art keywords
card
power supply
supply circuit
type public
public telephones
Prior art date
Application number
KR2019870019739U
Other languages
Korean (ko)
Other versions
KR900006607Y1 (en
Inventor
이영완
이무희
Original Assignee
국제전자공업 주식회사
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 국제전자공업 주식회사 filed Critical 국제전자공업 주식회사
Priority to KR2019870019739U priority Critical patent/KR900006607Y1/en
Publication of KR890011916U publication Critical patent/KR890011916U/en
Application granted granted Critical
Publication of KR900006607Y1 publication Critical patent/KR900006607Y1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
    • H04M2201/04—Transistors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
    • H04M2201/10—Logic circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
    • H04M2201/18—Comparators
KR2019870019739U 1987-11-14 1987-11-14 Voltage supply circuit of telephone KR900006607Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019870019739U KR900006607Y1 (en) 1987-11-14 1987-11-14 Voltage supply circuit of telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019870019739U KR900006607Y1 (en) 1987-11-14 1987-11-14 Voltage supply circuit of telephone

Publications (2)

Publication Number Publication Date
KR890011916U true KR890011916U (en) 1989-07-15
KR900006607Y1 KR900006607Y1 (en) 1990-07-26

Family

ID=19269457

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019870019739U KR900006607Y1 (en) 1987-11-14 1987-11-14 Voltage supply circuit of telephone

Country Status (1)

Country Link
KR (1) KR900006607Y1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100290205B1 (en) * 1998-03-25 2001-05-15 이성주 Power supply of wire communication apparatus using telephone line

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100290205B1 (en) * 1998-03-25 2001-05-15 이성주 Power supply of wire communication apparatus using telephone line

Also Published As

Publication number Publication date
KR900006607Y1 (en) 1990-07-26

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Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 19930719

Year of fee payment: 6

LAPS Lapse due to unpaid annual fee