fr_atm技能评估体系.ppt

,Frame Relay and ATM Interworking,Approaches to Interworking Interworking Market Drivers The Benefits of Interworking The Technology of Interworking (Technical Submodule),Presentation Overview,Frame Relay PVC to ATM Network Interworking FRF.5 Scenario 1 and 2 SVC Interworking Planned Frame Relay PVC to ATM Service Interworking FRF.8 Transparent and Translation Modes SVC Interworking Planned,Approaches To Interworking,The Protocol In and Out of the Network is Frame Relay ATM is Used in the Core of the Network to Improve Scalability and Economies of Scale,FRAME RELAY,ATM,FRAME RELAY,ATM,FRAME RELAY,FR UNI,FR UNI,Network Interworking,Each Location Uses the Technology Best Suited to its Applications and Needs The Interworking Function Converts Transparently Between the Protocols,FR,ATM,Frame Relay,ATM,FRAME RELAY,ATM,UNI,UNI,Service Interworking,Fast Growth of Frame Relay Services Concentration of Low Speed Remote Connections Hybrid Networks,The Need For Interworking,Frame Relay is Driving the Deployment of ATM Networks High Speed ATM Backbones Used by Service Providers to Improve Economies of Scale and Network Scalability Uses Network Interworking,Fast Growth Of Frame Relay Services,Connectivity Need,1.5-45Mbps,256K-45Mbps,56K-1.5M,9.6-256 Kbps,HQ,Regional HQ & Data Processing,Small Remote Offices,Mobile Workers & Telecommuters,FR or ATM,FR or ATM,FR,FR Dialup,Service,Corporate Organization,Concentration Of Low Speed Remote Sites,Allows High Speed Access at Main Location, Low Speed Access at Remote Sites Ensures Each Site is Provided a Solution that Delivers the Best Price Performance Lowers Overall Cost of Network Ownership Requires Service Interworking,56K,Dial Access,1.5M,768K,256K,ISDN,45M,56K,ATM,Frame Relay,1.5M,Remote Site Concentration Example,Hybrid Networks Combine Frame Relay, ATM, and Private Lines to Optimize Price/Performance,56K,Dial Access,1.5M,768K,256K,ISDN,45M,56K,ATM,Frame Relay,1.5M,45M,DS-3,DS-3,Hybrid Networks,Provides Investment Protection Connectivity Between Frame Relay and ATM Locations Smooth Evolution Between Technologies Improves Network Scalability Lowers Cost of Network Ownership Ensures Optimization of Network Price/Performance on a Site by Site Basis,The Benefits Of Interworking,Networking Interworking Scenario 1 Scenario 2 Service Interworking Transparent Mode Translation Mode,A Technical View Of Interworking,Standards Update Frame Relay Forum FRF.5 ITU I.555 RFC 1490 is Used at Both CPE End Points,IWF: Interworking Function,FR/ATM PVC Network Interworking Scenario 1,Standards Update Frame Relay Forum FRF.5 ITU I.555 RFC 1490 is Used at Both CPE End Points,IWF: Interworking Function,FR/ATM PVC Network Interworking Scenario 2,Standards Update Frame Relay Forum FRF. 8 ITU I.555,Transparent Payload Transport (No Protocol Processing) ATM AAL5-CPCS (FR Headers NOT Preserved),Q.922 Core,PHY,PHY,ATM,SAR,CPCS,Null SSCS,IWF: Interworking Function,FR/ATM Service Int