KR870004453U - Long-distance call prevention circuit by selecting switch contact - Google Patents

Long-distance call prevention circuit by selecting switch contact

Info

Publication number
KR870004453U
KR870004453U KR2019850010304U KR850010304U KR870004453U KR 870004453 U KR870004453 U KR 870004453U KR 2019850010304 U KR2019850010304 U KR 2019850010304U KR 850010304 U KR850010304 U KR 850010304U KR 870004453 U KR870004453 U KR 870004453U
Authority
KR
South Korea
Prior art keywords
long
switch contact
prevention circuit
selecting switch
distance call
Prior art date
Application number
KR2019850010304U
Other languages
Korean (ko)
Other versions
KR880001333Y1 (en
Inventor
박양건
김선옥
Original Assignee
삼성반도체통신 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 삼성반도체통신 주식회사 filed Critical 삼성반도체통신 주식회사
Priority to KR2019850010304U priority Critical patent/KR880001333Y1/en
Publication of KR870004453U publication Critical patent/KR870004453U/en
Application granted granted Critical
Publication of KR880001333Y1 publication Critical patent/KR880001333Y1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/677—Preventing the dialling or sending of predetermined telephone numbers or selected types of telephone numbers, e.g. long distance numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
    • H04M2201/02—Diodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
KR2019850010304U 1985-08-12 1985-08-12 D d d preventing circuit KR880001333Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019850010304U KR880001333Y1 (en) 1985-08-12 1985-08-12 D d d preventing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019850010304U KR880001333Y1 (en) 1985-08-12 1985-08-12 D d d preventing circuit

Publications (2)

Publication Number Publication Date
KR870004453U true KR870004453U (en) 1987-07-31
KR880001333Y1 KR880001333Y1 (en) 1988-04-02

Family

ID=19244711

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019850010304U KR880001333Y1 (en) 1985-08-12 1985-08-12 D d d preventing circuit

Country Status (1)

Country Link
KR (1) KR880001333Y1 (en)

Also Published As

Publication number Publication date
KR880001333Y1 (en) 1988-04-02

Similar Documents

Publication Publication Date Title
FR2578354B1 (en) CIRCUIT BREAKER THAT CAN OPERATE AS A SWITCH
KR860004443A (en) Circuit breaker that can act as a switch
FR2569304B1 (en) CIRCUIT SWITCH
ES297069Y (en) ELECTRIC SWITCH.
BR8606792A (en) TELEPHONE LINE SWITCH
KR860005411A (en) Vacuum circuit breaker contact
BR8405182A (en) INSTANT ELECTRIC SWITCH
BR8406232A (en) ELECTRIC SWITCH
KR870002933U (en) Circuit breaker
GB8523516D0 (en) Switch circuit
ES296972Y (en) DISCONNECT SWITCH
KR870001226U (en) Circuit breaker
ES296673Y (en) AN ELECTRICAL SWITCH.
DK416787A (en) ADAPTIVE SWITCH CIRCUIT
BR8501910A (en) INSTANT ELECTRIC SWITCH
GB2176961B (en) Switching circuit
ATA186986A (en) SWITCH DISCONNECTOR
ES534848A0 (en) ELECTRICAL CURRENT LIMITING SWITCH
KR870004453U (en) Long-distance call prevention circuit by selecting switch contact
BE892605A (en) SWITCHING SWITCHING CIRCUIT
DK65283D0 (en) ELECTRICAL FORK SWITCH
GB8613618D0 (en) Switching circuit
GB8617277D0 (en) Switching circuit
GB8616486D0 (en) Snap-acting switch
BR8501911A (en) INSTANT ELECTRIC SWITCH

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 19920331

Year of fee payment: 5

LAPS Lapse due to unpaid annual fee