KR910016003U - Bell signal detection device - Google Patents

Bell signal detection device

Info

Publication number
KR910016003U
KR910016003U KR2019900001324U KR900001324U KR910016003U KR 910016003 U KR910016003 U KR 910016003U KR 2019900001324 U KR2019900001324 U KR 2019900001324U KR 900001324 U KR900001324 U KR 900001324U KR 910016003 U KR910016003 U KR 910016003U
Authority
KR
South Korea
Prior art keywords
detection device
signal detection
bell signal
bell
signal
Prior art date
Application number
KR2019900001324U
Other languages
Korean (ko)
Other versions
KR930001223Y1 (en
Inventor
이구식
Original Assignee
현대전자산업 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 현대전자산업 주식회사 filed Critical 현대전자산업 주식회사
Priority to KR2019900001324U priority Critical patent/KR930001223Y1/en
Publication of KR910016003U publication Critical patent/KR910016003U/en
Application granted granted Critical
Publication of KR930001223Y1 publication Critical patent/KR930001223Y1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/82—Line monitoring circuits for call progress or status discrimination
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephonic Communication Services (AREA)
KR2019900001324U 1990-02-06 1990-02-06 Bell signal detecting circuit KR930001223Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019900001324U KR930001223Y1 (en) 1990-02-06 1990-02-06 Bell signal detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019900001324U KR930001223Y1 (en) 1990-02-06 1990-02-06 Bell signal detecting circuit

Publications (2)

Publication Number Publication Date
KR910016003U true KR910016003U (en) 1991-09-25
KR930001223Y1 KR930001223Y1 (en) 1993-03-18

Family

ID=19295783

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019900001324U KR930001223Y1 (en) 1990-02-06 1990-02-06 Bell signal detecting circuit

Country Status (1)

Country Link
KR (1) KR930001223Y1 (en)

Also Published As

Publication number Publication date
KR930001223Y1 (en) 1993-03-18

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