KR900001163A - In-use circuit in the telephone - Google Patents

In-use circuit in the telephone Download PDF

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Publication number
KR900001163A
KR900001163A KR1019880007802A KR880007802A KR900001163A KR 900001163 A KR900001163 A KR 900001163A KR 1019880007802 A KR1019880007802 A KR 1019880007802A KR 880007802 A KR880007802 A KR 880007802A KR 900001163 A KR900001163 A KR 900001163A
Authority
KR
South Korea
Prior art keywords
telephone
circuit
bridged
bridge diode
line
Prior art date
Application number
KR1019880007802A
Other languages
Korean (ko)
Other versions
KR910003921B1 (en
Inventor
허주원
Original Assignee
강진구
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 강진구, 삼성반도체통신 주식회사 filed Critical 강진구
Priority to KR1019880007802A priority Critical patent/KR910003921B1/en
Publication of KR900001163A publication Critical patent/KR900001163A/en
Application granted granted Critical
Publication of KR910003921B1 publication Critical patent/KR910003921B1/en

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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
    • H04M1/71—Substation extension arrangements
    • H04M1/715—Substation extension arrangements using two or more extensions per line

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

내용 없음No content

Description

전화기에 있어서 인유스 회로In-use circuit in the telephone

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명에 따른 회로도.2 is a circuit diagram according to the present invention.

제3도는 본 발명에 따른 제2도를 이용한 2라인 전화기에서의 다른 실시예 회로도.3 is a circuit diagram of another embodiment of a two-line telephone using FIG. 2 according to the present invention.

Claims (2)

브리지 다이오드와 인유스 지시회로를 구비한 브리지된 전화기의 인유스회로에 있어서, 상기 브리지 다이오드로 부터 출력된 브리지된 전화기의 사용 유무에 따라 선로 전압 상태를 출력하는 제1수단과, 외부 전원에 의해 기준전압을 발생하는 제2수단과, 상기 제1수단과 제2수단의 출력을 비교하여 비교출력에 따라 상기 인유스회로를 구동하는 제3수단과, 상기 브리지 다이오드측 전화기 선로와 상기 외부전원 접지를 가상적인 충분한 절연상태로 유지시키는 제4수단으로 구성됨을 특징으로 하는 회로.An in-use circuit of a bridged telephone having a bridge diode and an in-use indicating circuit, comprising: first means for outputting a line voltage state depending on whether or not a bridged telephone output from the bridge diode is used; Second means for generating a reference voltage, third means for comparing the outputs of the first means and the second means to drive the inuse circuit according to a comparative output, the bridge diode side telephone line and the external power ground And fourth means for maintaining a virtually sufficient insulation state. 제1항에 있어서, 제2수단의 외부전원이 상기 브리지된 2-라인 전화기의 공통 전원으로 입력되도록 구성됨을 특징으로 하는 회로.2. The circuit of claim 1, wherein the external power source of the second means is configured to be input to a common power source of the bridged two-line telephone. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019880007802A 1988-06-27 1988-06-27 In-use circuit in telephone KR910003921B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019880007802A KR910003921B1 (en) 1988-06-27 1988-06-27 In-use circuit in telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019880007802A KR910003921B1 (en) 1988-06-27 1988-06-27 In-use circuit in telephone

Publications (2)

Publication Number Publication Date
KR900001163A true KR900001163A (en) 1990-01-31
KR910003921B1 KR910003921B1 (en) 1991-06-15

Family

ID=19275580

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019880007802A KR910003921B1 (en) 1988-06-27 1988-06-27 In-use circuit in telephone

Country Status (1)

Country Link
KR (1) KR910003921B1 (en)

Also Published As

Publication number Publication date
KR910003921B1 (en) 1991-06-15

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