KR880002352A - Interface circuit for CO line exchange of 4-wire telephone - Google Patents

Interface circuit for CO line exchange of 4-wire telephone Download PDF

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Publication number
KR880002352A
KR880002352A KR1019860005728A KR860005728A KR880002352A KR 880002352 A KR880002352 A KR 880002352A KR 1019860005728 A KR1019860005728 A KR 1019860005728A KR 860005728 A KR860005728 A KR 860005728A KR 880002352 A KR880002352 A KR 880002352A
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KR
South Korea
Prior art keywords
resistor
output terminal
input terminal
terminal
transistors
Prior art date
Application number
KR1019860005728A
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Korean (ko)
Other versions
KR890004745B1 (en
Inventor
이근태
박종철
장성진
윤성표
Original Assignee
동양정밀공업 주식회사
권혁조
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.)
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Application filed by 동양정밀공업 주식회사, 권혁조 filed Critical 동양정밀공업 주식회사
Priority to KR1019860005728A priority Critical patent/KR890004745B1/en
Publication of KR880002352A publication Critical patent/KR880002352A/en
Application granted granted Critical
Publication of KR890004745B1 publication Critical patent/KR890004745B1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M5/00—Manual exchanges
    • H04M5/18—Arrangements for signalling the class or number of called or calling line from one exchange to another
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges

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

Abstract

내용 없음No content

Description

4선식 전화기의 국선교환용 인터페이스 회로Interface circuit for CO line exchange of 4-wire telephone

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

첨부도면은 본 발명의 회로도.The accompanying drawings are circuit diagrams of the present invention.

Claims (1)

4선식 전화기와 연결된 수신측 연결단자(PR1),(PR2)에서 하이브리드 회로 (HY1)와 제너다이오드(ZD1)(ZD2)를 거쳐 연산증폭기(OP1)에서 2배 증폭된후 저항(R1)을 통하여 연산증폭기(OP2)의 반전 입력단자(-)로 연결하는 동시에 다시 저항(R2)을 통하여 연산증폭기(OP2)의 출력단과 합쳐져 제너다이도으(ZD3)(ZD4)와 하이브리드회로(Hy2)를 거쳐 송신측 연결단자(RT1),(RT2)와 연결하며, 저항(R3)을 통하여 트랜스 (T)의 일차코일과 연결하는 동시에 다시 아날로그 디먹스 스위치IC(IC6)의 출력단 (R4)을 거침것과 합쳐져 저항(R5)을 통해 연산증폭기(OP2)의 비반전 입력단자 (+)로 연결하는 한편, 저항(R7)을 통하여 2250HZ의 주파수를 검출하는 통화신호감지 IC(IC1)와 2600Hz의 주파수를 검출하는 통화종료 감지 IC(IC2)의 입력단에 각각 연결하고 각 출력단에서 입력단(PB7),(PB6)이 연결된 콘트롤 IC(IC3)를 통해 중앙처리 장치와 연결하며, 콘트롤 IC(IC4)의 출력단 (PA2)에서 아날로그 디먹스 스위치 IC(IC6)의 입력단과 연결하고 출력단(PA7)에서는 아날로그 IC(IC4)의 입력단과 연결하며 톤소스네트웍 연결단자 (Ts)와 입력단과 연결되고 20HZ의 주파수에 의해 작동하는 텅신호 개폐회로(IC4)의 출력단과 타측 입력단이 연결된 아날로그 IC(IC4) 의 출력단에서 저항(R6)를 거쳐 연상증폭기(OP2)의 반전입력단자(-)과 연결하고, 트랜스(T)의 이차코일(t1)은 톤네트웍의 DTMF 리버시풀 연결단자(TN)와 연결하며 이차코일(t2),(t3)의 일측은 각각 트랜지스터(TR1),(TR2)와 연결하고 에미터가 접지된 트랜지스터 (TR1),(TR2)의 베이스로 인가되는 인가전원(Vcc)은 트랜지스터 (TR3)의 콜렉터와 트랜지스터(TR4)(TR5)의 베이스로 인가하며 에미터가 접지된 트랜지스터의 베이스와 연결된 콜렉콘트롤 IC(IC3)의 출력단(PA4)은 접지시키면서 트랜지스터(TR4),(TR5)의 에미터와 연결하여 구성한 4선식 전화기의 국선 교환용 인터페이스 회로.It is amplified twice in the operational amplifier (OP 1 ) through the hybrid circuit (HY 1 ) and the zener diode (ZD 1 ) (ZD 2 ) at the receiving terminal (PR 1 ) and (PR 2 ) connected to the 4-wire telephone. The resistor R 1 is connected to the inverting input terminal (-) of the operational amplifier OP 2 , and at the same time, it is combined with the output terminal of the operational amplifier OP 2 through the resistor R 2 to be applied to the zener die diagram (ZD 3 ) ( ZD 4 ) and the hybrid circuit (Hy 2 ) are connected to the transmitter connection terminals (RT 1 ) and (RT 2 ), and are connected to the primary coil of the transformer (T) through the resistor (R 3 ) and at the same time, The output terminal (R 4 ) of the mux switch IC (IC 6 ) is combined with the non-inverting input terminal (+) of the operational amplifier (OP 2 ) through the resistor (R 5 ), while the resistor (R 7 ) is connected. Each signal is connected to the input terminals of the call signal detection IC (IC 1 ) detecting the frequency of 2250H Z and the call termination detection IC (IC 2 ) detecting the frequency of 2600Hz. Connect to the central processing unit through the control IC (IC 3 ) to which inputs (PB 7 ) and (PB 6 ) are connected, and the analog demux switch IC (IC 6 ) at the output terminal (PA 2 ) of the control IC (IC 4 ). A ton signal switch circuit (IC 4 ) connected to the input terminal of the analog IC (IC 4 ) at the output terminal (PA 7 ) and to the input terminal of the tone source network (Ts) and the input terminal and operated by a frequency of 20H Z. At the output terminal of analog IC (IC 4 ), which is connected to the output terminal of) and the other input terminal, is connected to the inverting input terminal (-) of the associative amplifier (OP 2 ) through the resistor (R 6 ) and the secondary coil (t) of the transformer (T). 1 ) is connected to the DTMF reversible pull terminal (TN) of the tone network, and one side of the secondary coil (t 2 ) and (t 3 ) is connected to the transistors (TR 1 ) and (TR 2 ) respectively and the emitter is grounded. The applied power source Vcc applied to the bases of the transistors TR 1 and TR 2 is the collector of the transistor TR 3 and the transistors TR 4 and TR 5 . A four-wire telephone set up by connecting the emitters of transistors TR 4 and TR 5 while the output terminal PA 4 of the collector control IC (IC 3 ) connected to the base of the transistor whose emitter is grounded is connected to the base. Interface circuit for CO line exchange. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019860005728A 1986-07-15 1986-07-15 Interface circuit in exchange KR890004745B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019860005728A KR890004745B1 (en) 1986-07-15 1986-07-15 Interface circuit in exchange

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019860005728A KR890004745B1 (en) 1986-07-15 1986-07-15 Interface circuit in exchange

Publications (2)

Publication Number Publication Date
KR880002352A true KR880002352A (en) 1988-04-30
KR890004745B1 KR890004745B1 (en) 1989-11-25

Family

ID=19251120

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019860005728A KR890004745B1 (en) 1986-07-15 1986-07-15 Interface circuit in exchange

Country Status (1)

Country Link
KR (1) KR890004745B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100271958B1 (en) * 1997-08-30 2000-11-15 윤종용 Line signalling apparatus for 4-wire analog central office line and method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100271958B1 (en) * 1997-08-30 2000-11-15 윤종용 Line signalling apparatus for 4-wire analog central office line and method thereof

Also Published As

Publication number Publication date
KR890004745B1 (en) 1989-11-25

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