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OCR: AT&T HIGH-SPEED PACKET SERVICES ARCHITECTURE Customer Services *Access options; Protocol access ATM Core Network management; Customer TOTO SONET ATMeand ATM circuit emulation ATMELUND JE1-T3 SONET Other AT&T! ATM TUN !! ATM services Hint :X 25: Internet FRYATM Sitoways R Data Frame relay FR/ATM network Managed operations network solutions center Frame relay FR FRYATA ATM CNMS LO ACLASS to customer management systems Figure 2. ATCHT's high-speed packet services architecture mixes private dedicated lines, frame relay, and ATM services to allow customers to internetwork all locations seamlessly, regardless of speed or access protocols.