OfficeServ 통신망에서의 Key-phone 의 위치 ⓧ ⓧ ⓧ PABXPABX ⓧ K/P KIX KINX KTIX DIX ISP ●●●

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Presentation transcript:

OfficeServ

통신망에서의 Key-phone 의 위치 ⓧ ⓧ ⓧ PABXPABX ⓧ K/P KIX KINX KTIX DIX ISP ●●●

Key-phone 의 탄생 n×(n-1) n C 2= ⓧ n ⓧ ⓧ ⓧ PABXPABX ⓧ K/P

Key-phone 의 진화 경향

Key-phone 과 사설, 국설 교환기 구별 ⓧ ⓧ

구성 : Enterprise WLAN PDA Note PC (Nic 포함 ) IP Switch WLAN HHP VoIP G/W 일반전화기 디지탈폰 Desktop PC (Nic 포함 ) VoIP Networking PSTN Internet xDSL Modem AP Spot view Spot call

구성 : SOHO WLAN PDA Note PC (Nic 포함 ) PSTN WLAN HHP WLAN Desktop 폰 일반전화기 Fax Internet xDSL Modem 내장형 AP Desktop PC (Nic 포함 ) Spot view Spot call

구성 : OS7200 AP Spot View Easyset Router Q.sig over VoIP Internet PSTN xDSL Modem WLAN PDA Note PC (Nic 포함 ) WLAN HHP WLAN Desktop 폰 일반전화기 Fax Desktop PC (Nic 포함 ) Spot view Spot call IP switch 내장

종합 구성 ( Enterprise, SME, SOHO ) × ↑ K/P PBX ↓ IP Network PSTN AP PDA 무선 LAN PC+NIC × ▷ VoIP Gateway 일반전화기 큰 LCD Digi-phone IP phone 무선 LAN 휴대폰 SOHO(Mini) SME Enterprise IAD

#0* 폰 S/W Upgrade 배경화면 Update 폰북 내용 Update 구성 : Digiphone Spot Call Server Easyset Server ICC Server Recording jack Headset jack (Option) : Contents 제공 녹음기능 제공 Headset RJ-11 jack 2 Kbps Sig. DLI IP Switch USB

구성 : IT phone 폰 S/W Upgrade 배경화면 Update 폰북 내용 Update Spot Call Server Easyset Server ICC Server Recording jack Headset jack (Option) : Contents 제공 녹음기능 제공 Headset RJ-45 jack IP Switch *0# RJ-45

기초 지식 : 7 Layers Application Presentation Session Transport Network Data link Physical 배, 비행기, 자동차 보통, 속달 봉투에 넣기 편지함 ↔ 관리실 몇 동 몇 호 잘못 투입 정정 × 주소 어느 지방으로 어떻게 우체국 간 화물량 조정 등기 / 일반, 배달증명 그 집의 누구와 무슨 일로 서신 ? 무슨 언어 ? ( 영어, 청소년 언어 ) 무슨 목적 ? ( 사업, 연애 ) LAN Ethernet, FDDI WAN HDLC, PPP, ATM Icmp, igmp IP arp TCPUDP FTP, Telnet, HTTP, POP3, DNS SNMP, DNS Application Transport Internet Network html CDMA WDP Transport layer WTLS Security layer WTP Transaction layer WSP Session layer WAE Wireless Application Environment WAP Protocol Data Unit Segment Packet, Datagram Frame, Cell

Leased Line Circuit-switched PPP, SLIP, HDLC HDLC, PPP, SLIP Packet-switched X.25, Frame Relay, ATM 기초 지식 : Circuit and Packet switching Telephone Company Service Provider

기초 지식 : Ethernet Data link Ethernet Fast Ethernet Gigabit Ethernet 10 Gigabit Ethernet ` u 802.3z 802.3ab 802.3ae Physical10 Base 210 Base 510 Base T10 Base F100Base TX100Base T4100Base FX UTP FTP 10 BaseT Media type Baseband LAN speed in Mbps

기초 지식 : Ethernet, TCP/IP Matryoshka DMAC SMAC Protocol Type DataFCS Min.64 Max.1500 Data Header VerHLen Service Type IdentificationFlags Fragmentation offset Time to liveProtocolHeader checksum Source IP address Destination IP address Data Source portDestination port Sequence number Acknowledge number Hlen,Res.,urg,ack..Window size Check sumUrgent pointer Header

Transport Data Link Physical Network Upper Layer Data TCP Header DataIP Header DataLLC Header DataMAC Header Presentation Application Session Segment Packet Bits Frame PDU FCS 기초 지식 : Encapsulation

Upper Layer Data LLC Hdr + IP + TCP + Upper Layer Data MAC Header IP + TCP + Upper Layer Data LLC Header TCP+ Upper Layer Data IP Header Upper Layer Data TCP Header Transport Data Link Physical Network Presentation Application Session 기초 지식 : De-encapsulation

기초 지식 : VoIP 초 록 식 초 록 색 Analog switching PCM switching VoIP switching G.711 PCM 64 kbps voice G.729 CS-ACELP 8kbps voice T.38 Fax T.120 Data H.323H.323 vs SIPSIP Link Header X byte IP Header 20 byte UDP Header 8 byte RTP Header 12 byte Voice payload 20~24 byte

기초 지식 : VoIP protocol stack IP Application Signaling (Wireless) Link UDP, TCP,... Transport Codecs IP Application Signaling (Wireless) Link UDP, TCP,... Transport Codecs Physical H.323, SIP

기초 지식 : Time switch Time Switch Ms G Mr Y ⓧ ⓧ

기초 지식 : Switch vs. Hub Full duplex is supported. Each Tx or Rx independent. Half duplex is supported. Each Tx or Rx shared. Sending→ Receiving←

기초 지식 : 무선 LAN 의 시장에서의 지위 PersonalHomeOfficeWide Area PAN LAN WAN - 저 전력 - 짧은 거리 - 유선 cable 대체 - 음성,data 즐기기 - 단순, 확실, 신뢰 - 유선 cable 대체 - Data 만 - Roaming - 저 간섭 MAN

기초 지식 : 무선 LAN 무선 LAN 무선 LAN KORNET b 2.4GHz, 11 Mbps e : QoS. Mac 강화 보안 f : Inter AP Protocol g : 보다 고속 (20→50 Mbps) h : 전송전력관리, 5GHz 사용