KR960027952A - Device that improves call characteristics when matching key phone system and regular telephone - Google Patents

Device that improves call characteristics when matching key phone system and regular telephone Download PDF

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Publication number
KR960027952A
KR960027952A KR1019940040383A KR19940040383A KR960027952A KR 960027952 A KR960027952 A KR 960027952A KR 1019940040383 A KR1019940040383 A KR 1019940040383A KR 19940040383 A KR19940040383 A KR 19940040383A KR 960027952 A KR960027952 A KR 960027952A
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KR
South Korea
Prior art keywords
call
resistor
signal
unit
matching
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KR1019940040383A
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Korean (ko)
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KR0148410B1 (en
Inventor
심재민
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김주용
현대전자산업 주식회사
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Priority to KR1019940040383A priority Critical patent/KR0148410B1/en
Publication of KR960027952A publication Critical patent/KR960027952A/en
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Publication of KR0148410B1 publication Critical patent/KR0148410B1/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
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/76—Compensating for differences in line impedance

Abstract

본 발명은 기폰시스템에서 일반전화기를 이용하여 통화를 하는 경우, 종래에는 선로 거리등에 따라 임피던스 메칭 및 송수화 게인을 조정하여 주지 않아 통화 감도가 낮은 경우가 발생하였다. 따라서 통화 상태에서 최적의 통화특성을 얻기 위하여 기폰 주장치와 일반전화기간 임피던스 정합 및 게인 조정방법에 대한 것으로써, 통화조건(근거리/장거기)에 따라 통화 선로의 저항등의 영향으로 통화전류가 변화하게 되는데, 일반전화기에 흐르는 전류를 포토커플러(PCI)로 감지하여, 근거기 일때와 원거리일때 임피던스 메칭을, 아날로그 멀티플렉서(SW1)을 제어하고, 동시에 송화 게인은(SW3), 수화 게인은(SW4), 측음제어는(SW2)를 이용하여 동시에 제어하여 통화특성을 양호하에 유지할 수 있어, 종전대비 회로비는 약간 상승하는 단점이 있으나, 장거리 선로 사용시 통화 특성을 양호하게 유지할 수 있는 장점이 있다.In the present invention, when making a call using a general telephone in a Gippon system, conventionally, the call sensitivity is low because the impedance matching and the handset gain are not adjusted according to the line distance. Therefore, in order to obtain optimal call characteristics in the call state, the impedance matching and gain adjustment method of the main device of the phone and the general phone period are used.The call current changes due to the resistance of the call line depending on the call conditions (near / long period). It detects the current flowing through a general telephone with a photocoupler (PCI), controls impedance matching at the base station and at the far end, and controls the analog multiplexer (SW1), while the transmit gain (SW3) and the sign language gain (SW4). ), Sidetone control can be controlled at the same time by using (SW2) to maintain a good call characteristics, compared with the conventional circuit ratio slightly increases, but has the advantage of maintaining good call characteristics when using a long distance line.

Description

키폰시스템과 일반전화기 매칭시 통화특성을 양호하게 하는 장치Device that improves call characteristics when matching key phone system and regular telephone

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

제1도는 종래의 일반전화기와 매칭된 키폰시스템의 내선 회로도, 제2도는 본 발명의 일반전화기와 매칭된 키폰시스템의 내선 회로도이다.1 is an internal circuit diagram of a key phone system matched with a conventional general telephone, and FIG. 2 is an internal circuit diagram of a key phone system matched with a conventional telephone.

Claims (4)

(T)와 (R)사이에 연결되는 일반전화기(1)와; 키폰 장치로부터 링(ring) 신호를 입력받아 스위치 단자 접단에 의해 링신호를 제어하는 링 신호 제어용 제1릴레이스위치(RL1)와; 통화중에 외부에서 인입되는 써지(surge)를 제한하기 위한 써지보호부(10)와; 일반전화기 가입자의 수신여부를 판단하는 피딩회로부(20); 피딩 회로부(20)을 통과한 통화전류를 제어하기 위해 트랜스포머(T1)로 연결되어 입력된 전류를 제어하기 위한 통화전류 제어부(50)와; 통화전류 제어부(50)의 신호를 음성신호로 변환하는 음성신호 변환부(60)와; 저항(R13)과 포토커플러(RC2)로 구성된 응답감지부(30); 송수화 상태를 감지하여 링신호를 제어하는 중앙처리 장치 제어부(70)를 포함하여 구성된 키폰 시스템과 일반전화기와의 매칭회로에 있어서, 상기 피딩회로부(20)의 링 신호 상태를 감지토록 피딩회로 감지부(40)를 연결 구성하고, (40)에 의해 감지된 신호와 트랜스포머(T1)에 의해 입력된 신호를 조절하도록 통화전류제어부(50')를 포함하여 구성함을 특징으로 하는 키폰시스템과 일반전화기 매칭시 통화특성을 양호하게 하는 장치.A general telephone (1) connected between (T) and (R); A ring signal control first relay switch RL1 for receiving a ring signal from the key-phone device and controlling the ring signal by a switch terminal contact; A surge protection unit 10 for limiting surge introduced from outside during a call; A feeding circuit unit 20 for determining whether a general telephone subscriber is received; A talk current control unit 50 connected to a transformer T1 to control a talk current passing through the feeding circuit unit 20 to control an input current; A voice signal converter 60 for converting a signal from the call current controller 50 into a voice signal; A response detecting unit 30 including a resistor R13 and a photo coupler RC2; In a matching circuit between a key phone system and a general telephone configured to include a central processing unit controller 70 for controlling a ring signal by detecting a handset state, a feeding circuit is sensed so as to detect a ring signal state of the feeding circuit unit 20. A key phone system and a general device comprising a communication current control unit 50 'configured to connect and configure the unit 40 and control the signal sensed by the 40 and the signal input by the transformer T1. A device that improves call characteristics when matching a telephone. 제1항에 있어서, 피딩회로 감지부(20)는 저항(R14)과 포토커플러(PC1)를 포함하여 구성됨을 특징으로 하는 키폰시스템과 일반전화기 매칭시 통화특성을 양호하게 하는 장치.The apparatus as claimed in claim 1, wherein the feeding circuit detector (20) comprises a resistor (R14) and a photo coupler (PC1). 제1항에 있어서, 통화전류제어부(50')는 4개의 멀티플렉서(Multiplexer); (SW1), (SW2), (SW3), (SW4)를 포함하여 구성함을 특징으로 하는 키폰시스템과 일반전화기 매칭시 통화특성을 양호하게 하는 장치.2. The apparatus of claim 1, wherein the talk current controller 50 'comprises: four multiplexers; A device for improving call characteristics when matching a key phone system and a general telephone, comprising (SW1), (SW2), (SW3), and (SW4). 제3항에 있어서, 상기의 멀티플렉서(SW1)은 통화 상태에서 감지된 통화전류인 제1포토커플러(PC1)의 출력신호(B)로 임피던스 메칭을 변화시키기 위하여 저항(R22)와 병렬로 연결하여 구성하고; (SW3)는 송화게인용으로 저항(R27) 저항(R28)과 병렬로 연결하여 구성하며; (SW4) 수화게인 조정용으로 저항(R29) 저항(R30)과 병렬로 연결하여 구성하고; (SW2)는 측음제어용으로 임피던스(Z1), (Z2)를 병렬로 연결 구성하여; 4개의 아날로그 멀티플렉서를 동시에 제어함을 특징으로 하는 키폰시스템과 일반전화기 매칭시 통화특성을 양호하게 하는 장치.The method of claim 3, wherein the multiplexer (SW1) is connected in parallel with the resistor (R22) in order to change the impedance matching to the output signal (B) of the first photocoupler (PC1) which is the talk current sensed in the call state. Construct; (SW3) is configured by connecting in parallel with the resistor (R27) resistor (R28) for the transmission gain; (SW4) configured to be connected in parallel with resistor R29 and resistor R30 for hydration gain adjustment; SW2 is configured to connect the impedances Z1 and Z2 in parallel for sidetone control; Keyphone system characterized by controlling four analog multiplexers at the same time, the device to improve the call characteristics when matching a regular telephone. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940040383A 1994-12-31 1994-12-31 Apparatus for improving call quality in matching keyphone system and telephone KR0148410B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940040383A KR0148410B1 (en) 1994-12-31 1994-12-31 Apparatus for improving call quality in matching keyphone system and telephone

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Application Number Priority Date Filing Date Title
KR1019940040383A KR0148410B1 (en) 1994-12-31 1994-12-31 Apparatus for improving call quality in matching keyphone system and telephone

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KR960027952A true KR960027952A (en) 1996-07-22
KR0148410B1 KR0148410B1 (en) 1998-11-02

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100446529B1 (en) * 1997-08-28 2004-10-14 삼성전자주식회사 Hybrid interface circuit for offsetting a side tone in a keyphone system, particularly so as to offset a side tone according to a loop in the hybrid interface circuit using a center tap pin of a transformer

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