KR920009146A - Phone number extension device - Google Patents

Phone number extension device Download PDF

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Publication number
KR920009146A
KR920009146A KR1019900017001A KR900017001A KR920009146A KR 920009146 A KR920009146 A KR 920009146A KR 1019900017001 A KR1019900017001 A KR 1019900017001A KR 900017001 A KR900017001 A KR 900017001A KR 920009146 A KR920009146 A KR 920009146A
Authority
KR
South Korea
Prior art keywords
dtmf signal
circuit
call
extension
dtmf
Prior art date
Application number
KR1019900017001A
Other languages
Korean (ko)
Other versions
KR930010280B1 (en
Inventor
조병모
라인식
Original Assignee
이진호
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 이진호 filed Critical 이진호
Priority to KR1019900017001A priority Critical patent/KR930010280B1/en
Publication of KR920009146A publication Critical patent/KR920009146A/en
Application granted granted Critical
Publication of KR930010280B1 publication Critical patent/KR930010280B1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Telephone Function (AREA)
  • Telephonic Communication Services (AREA)

Abstract

내용 없음No content

Description

전화 번호 확장 장치Phone number extension device

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

제1도는 전화 번호 확장 장치에 대한 상세한 회로도,1 is a detailed circuit diagram of the telephone number expansion device,

제2도는 확장 번호부의 상세한 회로도.2 is a detailed circuit diagram of the extension directory.

Claims (5)

전화를 자동응답한 후 추가로 입력되는 DTMF 신호를 식별하고 예치된 확장번호와 비교판단을 위한 DTMF 디코더와 일련의 비교기 회로 및 이 회로 출력으로 벨을 구동시키는 회로로 구성되어 외부에서 Direct Inward Dialing을 가능케하는 선별 호출 회로와 상호 호출 및 착신 전환을 위한 인터폰 회로 및 기존 번호를 동작하기 위한 일련의 회로로 이루어진 것을 특징으로 하는 선별호출 방법.It consists of DTMF decoder to identify additional input DTMF signal after answering the phone automatically, and a set of comparator circuit for driving extension number and comparison judgment, and a circuit driving the bell with this circuit output for external direct inward dialing. A selective calling method comprising a selective calling circuit for enabling a call, an interphone circuit for mutual calling and call forwarding, and a series of circuits for operating an existing number. 제1항에 있어서 전화를 자동응답할때 여러개의 번호 확장 장치를 사용할 수 있기 위해 포트 카플러를 사용하여 임피던스를 낮춘것을 특징으로 하는 자동응답 방법.The method of claim 1, wherein the impedance is reduced by using a port coupler so that multiple number expansion devices can be used when the telephone is automatically answered. 제1항에서 미리 정해진 DTMF 신호가 일정시간 (예: 0번이 2초이상) 입력되었을때 이를 적분하여 선별 호출 신호를 감지하고 번호 확장기가 전화를 받는 상태로 (HOOK OFF) 동작케 하고 연이어서 자신의 확장번호가 DTMF 신호의 형태로 입력되었을 때 벨을 울리게 하므로써 번호 확장 장치 상호간의 호출 및 착신 전환을 가능케 하는 방법.When the predetermined DTMF signal in claim 1 is input for a predetermined time (for example, 0 is 2 seconds or more), it is integrated to detect a screening call signal, and the number expander operates to receive a call (HOOK OFF) and then A method that enables ringing and forwarding between number extension devices by ringing when their extension number is entered in the form of DTMF signals. 제1항에서 전화를 자동응답한후 일정시간(예:3초)안에 추가적인 DTMF 신호의 입력여부를 판단하기 위한 일련의 타이머 회로와 DTMF 신호 존재 검출회로로 이루어져 일정시간안에 추가적인 DTMF 신호가 입력되지 않았을때는 확장 번호를 모르는 것으로 간주하고 벨을 울려 주게 하는 회로와 이를 선택 스위치에 의해서 선택적으로 사용할 수 있도록 하여 여러대의 번호확장장치가 동시에 사용시 어느 한대는 기존의 전화번호로 동작할 수 있게 하는 방법.The system is composed of a series of timer circuits and DTMF signal presence detection circuits to determine whether an additional DTMF signal is input within a certain time (for example, 3 seconds) after the telephone is automatically answered. If you do not know the extension number is not known to ring the bell and the selector switch that can be used by the selective switch so that any number extension device can be used to operate one existing phone number at the same time. 상기의 선별호출을 가능케 하는 기본 구상을 변경하지 않는 범위 내에서, DTMF 신호를 비교하고 벨을 울리기 위하여 IC나 마이크로 프로세서를 사용하여 제작하는 방법.A method using an IC or a microprocessor to compare and ring a DTMF signal without changing the basic concept for enabling the selective calling. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019900017001A 1990-10-24 1990-10-24 Telephone number extension system KR930010280B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019900017001A KR930010280B1 (en) 1990-10-24 1990-10-24 Telephone number extension system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019900017001A KR930010280B1 (en) 1990-10-24 1990-10-24 Telephone number extension system

Publications (2)

Publication Number Publication Date
KR920009146A true KR920009146A (en) 1992-05-28
KR930010280B1 KR930010280B1 (en) 1993-10-16

Family

ID=19305089

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019900017001A KR930010280B1 (en) 1990-10-24 1990-10-24 Telephone number extension system

Country Status (1)

Country Link
KR (1) KR930010280B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100394036B1 (en) * 2001-03-07 2003-08-06 주식회사 플레넷 Power Line Communication Transceiver Utilizing Spectrum Spreading Scheme

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100394036B1 (en) * 2001-03-07 2003-08-06 주식회사 플레넷 Power Line Communication Transceiver Utilizing Spectrum Spreading Scheme

Also Published As

Publication number Publication date
KR930010280B1 (en) 1993-10-16

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