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과목: 임베디스 시스템
담당 교수님: 이민석 교수님

임베디드 시스템 –ATM

(AUTOMATED TELLER MACHINE)
ATM이란?
•

ATM 은 패킷 교환 방식 처럼 패킷(셀)을 사용

그 길이가 53 Byte (48byte

데이터 + 5 byte 헤더)로 고정 되어 있음

•

회선 교환 방식 처럼 통신 경로,타임 슬롯 (VC,VP)의 원리를 이용하여 하드
웨어에 의존한 Routing을 수행

•

ATM은 회선 교환과 패킷 교환의 장점만을 흡수한 방식 이라고 할 수 있음

<ATM 교환의 구조>: 셀 길이는 고정적이며 헤더내의 VCI를 분석
고속 하드웨어로 처리
제품 설명

• Card reader: 계정 번호의 식별 부
분, 사용자의 계정 정보를 이해 데
이터 프로세서 전달
Card reader

Display
screen

• Key pad: pin 번호는 올바른 ATM
필요한 금액에 대 한 필요한 거래
를 만듬
• Speaker: 특정 키를 누르면, 스피
커 오디오 피드백을 제공

Receipt printer
Key pad

speaker

• Display screen: 트랜잭션 , 사용
자입력에 대한 현금 인출기의 질
문 , 화면에 표시
• Cash dispenser : ATM 기계의 중
앙 시스템, 돈을 얻음

Cash dispenser

• Receipt printer: 영수증 프린터
왜 소프트웨어로 만드는 것이 좋았을까?
1. 유연한 네트워크
• 컴퓨터 센터의 제어에 의해 통신상대의 지역,장소에 따라 융통적인 네트워
크, 회선모드 서비스와 패킷교환 서비스, 저속 서비스와 고속 서비스

2. 효율적인 정보전송
• 같은 시각에 복수의 통신 채널이 중복되는 경우 대비하여 셀을
일시 축적 하기 위해 버퍼(Buffer)회로를 갖춤->대용량의 전송에
더 많은 통신 채널 확보

3. OAM보수 운용관리

• Operation, Administration and Maintenance
• 네트워크 내 고장,성능을 감시, 이상이 생기면 셀을 다른
경로로 우회 ->각종 방식에 따른 감시를 행함
감사합니다.

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임베디드 시스템 –Atm 최종

  • 1. 과목: 임베디스 시스템 담당 교수님: 이민석 교수님 임베디드 시스템 –ATM (AUTOMATED TELLER MACHINE)
  • 2. ATM이란? • ATM 은 패킷 교환 방식 처럼 패킷(셀)을 사용 그 길이가 53 Byte (48byte 데이터 + 5 byte 헤더)로 고정 되어 있음 • 회선 교환 방식 처럼 통신 경로,타임 슬롯 (VC,VP)의 원리를 이용하여 하드 웨어에 의존한 Routing을 수행 • ATM은 회선 교환과 패킷 교환의 장점만을 흡수한 방식 이라고 할 수 있음 <ATM 교환의 구조>: 셀 길이는 고정적이며 헤더내의 VCI를 분석 고속 하드웨어로 처리
  • 3. 제품 설명 • Card reader: 계정 번호의 식별 부 분, 사용자의 계정 정보를 이해 데 이터 프로세서 전달 Card reader Display screen • Key pad: pin 번호는 올바른 ATM 필요한 금액에 대 한 필요한 거래 를 만듬 • Speaker: 특정 키를 누르면, 스피 커 오디오 피드백을 제공 Receipt printer Key pad speaker • Display screen: 트랜잭션 , 사용 자입력에 대한 현금 인출기의 질 문 , 화면에 표시 • Cash dispenser : ATM 기계의 중 앙 시스템, 돈을 얻음 Cash dispenser • Receipt printer: 영수증 프린터
  • 4. 왜 소프트웨어로 만드는 것이 좋았을까? 1. 유연한 네트워크 • 컴퓨터 센터의 제어에 의해 통신상대의 지역,장소에 따라 융통적인 네트워 크, 회선모드 서비스와 패킷교환 서비스, 저속 서비스와 고속 서비스 2. 효율적인 정보전송 • 같은 시각에 복수의 통신 채널이 중복되는 경우 대비하여 셀을 일시 축적 하기 위해 버퍼(Buffer)회로를 갖춤->대용량의 전송에 더 많은 통신 채널 확보 3. OAM보수 운용관리 • Operation, Administration and Maintenance • 네트워크 내 고장,성능을 감시, 이상이 생기면 셀을 다른 경로로 우회 ->각종 방식에 따른 감시를 행함