KR880022865U - Ring signal generation circuit of telephone - Google Patents

Ring signal generation circuit of telephone

Info

Publication number
KR880022865U
KR880022865U KR2019870007640U KR870007640U KR880022865U KR 880022865 U KR880022865 U KR 880022865U KR 2019870007640 U KR2019870007640 U KR 2019870007640U KR 870007640 U KR870007640 U KR 870007640U KR 880022865 U KR880022865 U KR 880022865U
Authority
KR
South Korea
Prior art keywords
telephone
generation circuit
signal generation
ring signal
ring
Prior art date
Application number
KR2019870007640U
Other languages
Korean (ko)
Other versions
KR900006408Y1 (en
Inventor
박영환
Original Assignee
동양정밀공업 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 동양정밀공업 주식회사 filed Critical 동양정밀공업 주식회사
Priority to KR2019870007640U priority Critical patent/KR900006408Y1/en
Publication of KR880022865U publication Critical patent/KR880022865U/en
Application granted granted Critical
Publication of KR900006408Y1 publication Critical patent/KR900006408Y1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • 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
    • 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
    • H04M2201/14—Delay circuits; Timers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
    • H04M2201/38—Displays

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
KR2019870007640U 1987-05-19 1987-05-19 Ring signal generating circuit KR900006408Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019870007640U KR900006408Y1 (en) 1987-05-19 1987-05-19 Ring signal generating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019870007640U KR900006408Y1 (en) 1987-05-19 1987-05-19 Ring signal generating circuit

Publications (2)

Publication Number Publication Date
KR880022865U true KR880022865U (en) 1988-12-27
KR900006408Y1 KR900006408Y1 (en) 1990-07-20

Family

ID=19263003

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019870007640U KR900006408Y1 (en) 1987-05-19 1987-05-19 Ring signal generating circuit

Country Status (1)

Country Link
KR (1) KR900006408Y1 (en)

Also Published As

Publication number Publication date
KR900006408Y1 (en) 1990-07-20

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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: 19960619

Year of fee payment: 7

LAPS Lapse due to unpaid annual fee