Data SheetAll contents are Copyright © 1992–2006 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 1 of 9Cisco XR 12000 Series and Cisco 12000 Series RoutersThe Cisco® XR 12000 Series and Cisco 12000 Series routers compose a portfolio of intelligent routing solutions thatscale from 2.5- to n x10 Gbps capacity per slot, enabling carrier-class IP/Multiprotocol Label Switching (MPLS)networks and accelerating the evolution to IP Next-Generation Networks. Built upon a foundation of investmentprotection, this portfolio delivers up to 1.28-terabits-per-second switching capacity with wire-speed featureperformance, scalability, and graceful hardware and software upgrade paths.CISCO XR 12000 AND 12000 SERIES PRODUCT PORTFOLIO OVERVIEWThis portfolio of routers delivers capacity and services with its fully distributed forwarding architecture and high-efficiency crossbar switchfabric (Figure 1). The combination of a centralized scheduler and unique virtual output queuing (VOQ) technology is aimed at maximizingthe use of the switch fabric bandwidth, minimizing latency, and providing nonblocking performance. Cisco Systems® uses the latest inhigh-performance application-specific integrated circuit (ASIC) technology to provide line-rate forwarding with an extensive feature set,while maintaining the strict control of jitter and latency required for real-time services. Offering a comprehensive set of quality-of-service(QoS), IP/MPLS, and high-availability features, the Cisco XR 12000 Series and 12000 Series routers can help ensure maximum bandwidthusage and traffic differentiation while meeting even the strictest customer service-level agreements (SLAs).The Cisco XR 12000 Series and 12000 Series routers use Cisco IOS® XR Software and Cisco IOS Software, respectively, to delivernumerous service possibilities for network operators. With the addition of the Cisco XR 12000 Series to its high-end routing product lines,Cisco Systems gives providers a graceful upgrade path for their installed base of Cisco 12000 Series routers as they transition toward aconverged IP Next-Generation Network infrastructure. For a detailed list of feature support, software capabilities, compatibility, andrelease notes for Cisco IOS XR and Cisco IOS Software on these routers, visit: http://www.cisco.com/go/12000.The Cisco XR 12000 Series and 12000 Series routers product specifications are detailed in Table 1.