KR950007384A - Teletax Signal Transmission Circuit in Electronic Switching System - Google Patents

Teletax Signal Transmission Circuit in Electronic Switching System Download PDF

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Publication number
KR950007384A
KR950007384A KR1019930016566A KR930016566A KR950007384A KR 950007384 A KR950007384 A KR 950007384A KR 1019930016566 A KR1019930016566 A KR 1019930016566A KR 930016566 A KR930016566 A KR 930016566A KR 950007384 A KR950007384 A KR 950007384A
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KR
South Korea
Prior art keywords
signal
ttx
output
khz
teletax
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Application number
KR1019930016566A
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Korean (ko)
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KR960010865B1 (en
Inventor
윤덕만
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박성규
대우통신 주식회사
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Priority to KR1019930016566A priority Critical patent/KR960010865B1/en
Publication of KR950007384A publication Critical patent/KR950007384A/en
Application granted granted Critical
Publication of KR960010865B1 publication Critical patent/KR960010865B1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/24—Arrangements for supervision, monitoring or testing with provision for checking the normal operation
    • H04M3/248—Arrangements for supervision, monitoring or testing with provision for checking the normal operation for metering arrangements or prepayment telephone systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

본 발명은 전전자 교환기에서 공중전화의 과금을 위한 신호발생장치 중 공중전화기가 텔리택스 신호를 인지하여 과금할 수 있도록 한 전전자 교환기에서의 텔리택스 신호 송출회로에 관한 것으로, 본 발명은 바이어스 전압을 TTX 신호의 왜곡이 발생하지 않고 서비스하고자 하는 거리에 알맞는 크기를 갖도록 하며, TTX 신호를 각 채널별로 주입시 송출에 필요한 시간만을 각 채널별로 래치하여 송출하므로서 원하는 신호의 송출시간 제어가 용이하고, 공중전화기의 과금시 시외통화에 따른 과금시간의 간격마다 신호를 송출하는 TTX 신호 출력회로를 제공하는데 그 목적이 있다.The present invention relates to a teletax signal transmitting circuit in an all-electronic exchange which enables the payphone to recognize and charge the teletax signal among the signal generators for charging the payphone in the all-electronic exchange. It is possible to control the transmission time of a desired signal by latching and transmitting only the time required for transmission when TTX signal is injected for each channel without distorting the TTX signal. In addition, the purpose of the present invention is to provide a TTX signal output circuit for transmitting a signal at intervals of charging time according to long distance calls when charging public telephones.

본 발명은 16㎑ 발생부(5)와, TTX 신호 슬로프를 제어하는 TTX 신호 슬로프 제어부(4)와, 임피던스 및 TTX 신호 정합부(3)와, 바이어스 전압 공급부(2)를 구비하여 상기 목적을 달성한다.The present invention includes a 16 kHz generator (5), a TTX signal slope controller (4) for controlling the TTX signal slope, an impedance and TTX signal matching unit (3), and a bias voltage supply unit (2) to achieve the above object. To achieve.

Description

전전자 교환기에서의 텔리택스 신호 송출회로Teletax Signal Transmission Circuit in Electronic Switching System

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

제1도는 전전자 교환기의 가입자 정합회로와 본 발명과의 연결 구성도,1 is a connection diagram of a subscriber matching circuit of an electronic switching system and the present invention;

제2도는 제1도의 16㎑ 발생부의 내부구성도,2 is an internal configuration diagram of the 16-kV generator of FIG.

제3도는 본 발명이 적용된 전전자 교환기의 가입자 회로의 실제구조도.3 is an actual structural diagram of a subscriber circuit of an all-electronic exchange to which the present invention is applied.

Claims (3)

전전자 교환기에 적용되는 텔리택스 신호 송출회로에 있어서, 텔리택스 신호인 16㎑ 신호를 발생하는 16㎑ 발생부(5)와; 상기 16㎑ 발생부(5)의 출력신호와 외부의 프로세서로부터 스위칭 온/오프 신호를 입력받아 TTX 신호 슬로프를 제어하는 TTX 신호 슬로프 제어부(4)와; 가입자 라인과의 정합을 수행하는 SLIC(1)와 전전자 교환기로의 데이타 송수신을 인터페이스하는 콤보(6) 사이에 설치되어 정합 기능을 수행하며, 상기 TTX 신호 슬로프 제어부(4)의 출력을 상기 SLIC(1)의 입력으로 전달하는 임피던스 및 TTX 신호 정합부(3)와; 상기 SLIC(1)의 TTX 신호 입력단에 병렬로 연결되어 바이어스 전압을 인가하는 바이어스 전압공급부(2)를 구비하는 것을 특징으로 하는 전전자 교환기에서의 텔리택스 신호 송출회로.A teletax signal transmitting circuit applied to an all-electronic exchange, comprising: a 16-kHz generator 5 for generating a 16-kHz signal which is a teletax signal; A TTX signal slope controller (4) for controlling the TTX signal slope by receiving the output signal of the 16 Hz generator (5) and a switching on / off signal from an external processor; It is installed between the SLIC (1) performing matching with the subscriber line and the combo (6) for interfacing data transmission and reception to the electronic switchboard to perform a matching function, and outputs the output of the TTX signal slope control unit (4) to the SLIC An impedance and TTX signal matching section 3 which is transmitted to the input of (1); And a bias voltage supply unit (2) connected in parallel to the TTX signal input terminal of the SLIC (1) to apply a bias voltage. 제1항에 있어서, 상기 TTX 신호 슬로프 제어부(4)는, 외부의 프로세서로 부터 온/오프 제어신호를 입력받아 상기 16㎑ 발생부(5)의 출력신호를 온/오프 시키는 아날로그 스위치와; 상기 아날로그 스위치의 출력을 증폭하는 OP 앰프를 구비하도록 한 것을 특징으로 하는 전전자 교환기에서의 텔리택스 신호 송출회로.2. The TTX signal slope control unit (4) according to claim 1, further comprising: an analog switch which receives an on / off control signal from an external processor and turns on / off an output signal of the 16 Hz generator (5); And a telecommunications amplifier (OP) for amplifying the output of the analog switch. 제1항에 있어서, 상기 16㎑ 발생부(5)는, 전전자 교환기 내부에서 제공하는 PCM 2.048㎒ 클럭을 입력으로 하여 16㎑ 신호를 출력하는 16㎑ 카운터(13)와; 상기 16㎑ 카운터(13)의 신호를 필터링하는 대역통과 필터(12)와; 상기 대역 통과 필터(12)를 거친 신호를 필터링하는 저역통과 필터(11)와; 상기 저역통과 필터(11)의 출력을 입력저향(R2)을 통해 반전 단자로 입력받고 상기 반전단자 입력단과 출력단 사이에 출력레벨 조절용 피드백 저항(R1)이 연결되어 있는 OP 앰프(10)를 구비하는 것을 특징으로 하는 전전자 교환기에서의 텔리택스 신호 송출회로.The 16 kHz generator (5) includes: a 16 kHz counter (13) for outputting a 16 kHz signal by inputting a PCM 2.048 MHz clock provided in the electronic switchboard; A bandpass filter 12 for filtering the signal of the 16 kHz counter; A low pass filter (11) for filtering the signal passing through the band pass filter (12); The output of the low pass filter 11 is input to the inverting terminal through the input retardation (R2) and having an OP amplifier 10 having an output level control feedback resistor (R1) is connected between the inverting terminal input terminal and the output terminal A teletax signal transmitting circuit in an all-electronic exchange. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930016566A 1993-08-25 1993-08-25 Circuit for transmitting teletex signal of the switching system KR960010865B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930016566A KR960010865B1 (en) 1993-08-25 1993-08-25 Circuit for transmitting teletex signal of the switching system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930016566A KR960010865B1 (en) 1993-08-25 1993-08-25 Circuit for transmitting teletex signal of the switching system

Publications (2)

Publication Number Publication Date
KR950007384A true KR950007384A (en) 1995-03-21
KR960010865B1 KR960010865B1 (en) 1996-08-10

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KR1019930016566A KR960010865B1 (en) 1993-08-25 1993-08-25 Circuit for transmitting teletex signal of the switching system

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KR960010865B1 (en) 1996-08-10

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