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Cisco城域接入网络解决方案 ---Cable Presentation_ID © 1999, Cisco Systems, Inc. 1 Agenda • Cisco CATV Solution • Product Update • The Cisco Advantage www.cisco.com 2 Cable系统 Node Node 600-2000 Homes Node Hub Distribution Architecture Headend/ Regional Data Center Hub Node Node Hub Node Node Node Node COAX Tap Drop HUB Architecture Home Architecture www.cisco.com Drop 3 体系结构部件 • 头端 一个有限电视网的5个主要部件 • 中继电缆 • 邻域中的分布电缆 • 分接电缆 • 终端设备(电视、电 缆调制解调器、机顶 盒等) www.cisco.com 4 电缆系统拓扑 (光纤节点) 从/到头端 级联中一般不到5个放大器 一个节点一般支持200--2000个家庭 www.cisco.com 5 树和枝杈系统 中继电缆 头端 光纤节点 www.cisco.com 6 激活一个双向网络 TV 电缆调 制解调 器 HFC Tap 本地头端 LHE Receiver RHE (地区头端) 光纤 Fiber Rack TX /RX 光纤节点 For Each Channel Receiver 其他来源 Modulator and Scrambler Modulator and Scrambler 双向 LHE uBR 7246 UpConverter LC www.cisco.com 7 Hub示意图 Modulators AM and Digital Channels Upconverter,射频调制 RF RF 混频器 Fast Ether/GigEther MCNS Down MPS 7204 H OC-48 SONET/SDH/... MCNS Up L Universal Broadband Router www.cisco.com 8 有线电视网(HFC)的接入 数据网 UBR7246 Cable Router Cable Modem UBR924/ Small Cable router/ 机顶盒 模拟 TV 电话 铜轴电缆 5 - 42MHz 以太网 HFC 铜轴电缆 下行 27 - 40Mbps /Modem TV PC 上行nx ( 2.5 - 5Mbps) /Modem, n=1,2,4,6 www.cisco.com 9 有线电视网(HFC)的接入 uBR7246 Frequency Converter CH A CH B CH C CH D Local Feed Downstream: Each set of homes sees their primary downstream channel Combiner Combiner HFC www.cisco.com 10 有线电视网(HFC)的接入 uBR7246 Upstreams: Upstream terminate on respective Line Card HFC www.cisco.com 11 Sample Cable Plant Layout DOCSIS OOB DAVIC Analog TV Digital TV upstream downstream future 750Mhz 42Mhz Note: the frequencies for analog vs. digital are arbitrary; only must-carry laws dictate channel placement. 0Mhz www.cisco.com 12 Cable Channel • NTSC -USA - 6 MHz -27/36 Mbit/sec • 64/256 QAM -RF Modulated digital signal -Quadrature Amplitude • PAL -Europe - 8 MHz -36/46 Mbit/sec www.cisco.com 13 Data Rates TDMA Carrier QAM-256 8 b/Sym QAM-64 6 b/Sym QAM-16 4 b/Sym QPSK 2 b/Sym Freq Range MHz Channel Width MHz Baud Rate MSps 54-860 54-860 54-860 54-860 6 8 6 8 5.3605 7.15 5.057 6.74 42.88 57.2 30.34 40.44 ~38 ~57 ~27 ~36 5-42 5-42 5-42 5-42 1.6 3.2 1.6 3.2 1.28 2.56 1.28 2.56 5.12 10.24 2.56 5.12 ~4.6 ~9 ~2.3 ~4.6 www.cisco.com Raw Bit Payload Rate Rate Mbps Mbps 14 目前使用DOCSIS OSI Data Over Cable Networks Higher Layers Transport Network Applications DOCSIS Control TCP or UDP Messages IP IEEE 802.2 DOCSIS MAC Up Stream Down Stream TDMA(Mini-Slots) TDMA(MPEG) 5-65 MHz Band 6 MHz (QAM-64 or QAM-256) (QPSK or QAM-16) HFC Data Link Physical www.cisco.com 15 CASE Hub Data Center/Headend Backbone Local Ad Insertion Servers Antenna Cisco ONS 15454/GSR Cisco INA Manager Cisco Cable Troubleshooter Cisco Cable Manager Cisco CSRC To Billing Video Cisco uBR 7246-VXR Cisco INA2320 Cisco 6920 RateMux Cisco Cache Engine DOCSIS/EuroDOCSIS + DVB-RC/DAVIC/DVS-167 OpenCable™ Advanced PC Cisco 6920 RateMux Satellite VoD Servers Home Fiber Optic Ring CM HF C STB PC DVB-RC/DAVIC/DVS-167 OpenCable™ Basic Video PC Cisco 6920 RateMux CM HFC Cisco uBR 7246-VXR Cisco INA2320 Cisco Catalyst 6000 TV STB TV DOCSIS/EuroDOCSIS Cisco GSR 12000 PC Video CM Cisco 6920 RateMux Middleware Server To Internet Cisco uBR 7246-VXR www.cisco.com HF C STB PC TV 16 CASE • 设计参数 城市的家庭总数= 120,000 城市中的CATV用户(68%) = 81,600 节点 = 城市中的光纤节点总数 = 120 每节点通过的家庭 = 1000 每节点(68% )服务的平均家庭数 = 680 注,有些信息没用 www.cisco.com 17 CASE • 带宽特征 DS 信道带宽= 6 MHz DSDR = DS QAM-64 数据速率= 27 Mbps US (上行)信道带宽 = 1.6 MHz USDR = US QPSK 数据速率= 2 Mbps www.cisco.com 18 CASE • 设计预期 所有用户都将在Web上冲浪 预期渗透(10%) = 12,000 每节点的预期用户= 100 每节点用户数= 每节点最大有效用户数(25%) = 25 DSAT = 每有效用户的最大DS有效时间 = 25% USAT =每有效用户的最大US有效时间 = 25% MDSDR = 每用户的最低DS数据速率= 270 Kbps MUSDR =每用户的最低US数据速率= 40 Kbps www.cisco.com 19 CASE • 设计计算 可能用户/DS = DSDR/(DSAT * MDSDR) = 400 可能用户/US = USDR/(USAT * MUSDR) = 200 可能用户/DS (使用1x4 LC) = 200 x 4 = 800 限制在该例中为DS数据速率 有效用户/DS = 400 节点/DS = (用户/DS)/(用户/节点) = 400/25 = 16 所需DS通道 = 节点/(节点/DS) = 120/16 = 大约8 所需的uBR 7246机箱,带有8个1x4 LC = 8/4 = 2 www.cisco.com 20 Cable Management Solution Service Mgmt with Cisco Partners Order Entry Mgmt Billing Trouble Ticket Admin Network Management Provisioning LDAP CSRC CMTS & Modem Fault & Performance Monitoring Cable Manager TFTP DNS DHCP SNMP RF TroubleShooting Cable Troubleshooter Telnet uBR 7200 PCs DOCSIS CM 904/ 924 www.cisco.com 21 Cisco Subscriber Registration Center (CSRC) • A subscriber and CPE auto-provisioning system: • Enables subscriber self-registration and activation • Enables mass deployment of broadband services Data Voice www.cisco.com Video 22 CSRC Components Customer Billing and Support Subscriber Registration and Activation CPE and Network Provisioning Dial Roaming Access and Telco Return Customer Care Work Force, and Billing Systems User Registrar Network Modem Access Registrar Database Registrar Registrar Directory Service www.cisco.com 23 CSRC in the Network Billing System User and Modem Registrar v1.0 Self Activation HTTP Callout Manager SNMP Directory Client Reset via SNMP Directory DOCSIS CM Security LDAP Cisco Network Registrar v3.0T IP Address and Options DHCP DDNS Update LDAP Update DOCSIS Configuration DNS Directory Client Access Registrar v1.3 RADIUS TFTP Directory Client TOD Cisco Switch HFC Cable Plant Cisco 7246 uBR Backbone Telco Return www.cisco.com Dialin Server 5x00 24 CSRC in the Business Billing System, Customer Care, NMS Directory & Databases Cisco Subscriber Registration Center Configurer Administrator Policy and Subscriber Management Subscriber Registration & Activation www.cisco.com Technician Installation 25 The Subscriber Experience 1. Registration CSRC 2. Activation Directory / Database 3. Maintenance www.cisco.com 26 Cisco Cable Manager 2.0 • • • • • • • • Proactive network surveillance of uBR CMTS and cable modems Cable Modem SW image download Topology tree map of CMTS and Modems Tabular and graphical historical utilization and performance reports Color-coded chassis views Northbound SNMP and CORBA interface Uses CEMF 3.1 and Event Mgr 2.0 Bundled products • CiscoView for CMTS and Modems • DOCSIS CPE Configurator 2.0/3.0 • Cable Troubleshooter 1.1 Cisco Systems, Inc. Confidential www.cisco.com 34 27 Cable Manager实施 uBR/ CMs uBR/ CMs PC with X emulator Cable Manager Server Manages DOCSIS cable modems & its associated CMTS (uBR 7200 Series) uBR / CMs uBR/ CMs Unix client www.cisco.com uBR/ CMs 28 可管理的设备 • CMTS uBR7100 uBR7223 uBR7246 uBR10012 • Cable Access Router uBR 925、uBR924、CVA124、uBR905 • Cable Modems Cisco Partner modems other DOCSIS-compliant modems www.cisco.com 29 Agenda • Cisco CATV Solution • Product Update • The Cisco Advantage www.cisco.com 30 Cisco CMTS Products Software DOCSIS 0.9 DOCSIS 1.0 DOCSIS 1.0+ DVB 1.2 DOCSIS 1.1 DVB MC16S MC11/12/14/16C Pt-to-Multi Wireless Linecards MC11 MPEG Pt-to-Pt Wireless MC16E MC28 Platforms uBR10012 uBR7246VXR uBR7246 uBR7223 uBR7100 1H CY98 2H CY98 1H CY99 2H CY99 www.cisco.com 1H CY00 2H CY00 31 uBR10000 Series A new Class of CMTS • Cost: Virtually unlimited future scalability Passive point-to-point midplane Unique routing technology, optimized for real-world services Plans in place to overcome ALL potential bottlenecks • Revenue: Optimized for aggregation Increases Intelligence at edge of network Maximizes useful capacity where needed Supports future access and backbone evolution (DOCSIS, E-DOCSIS, DVB, wireless, MPEG, optical, distributed CMTS, etc) www.cisco.com 32 uBR10012 - Components Blower Assembly RF Linecards Power Modules Display Module Utility Cards LAN/WAN Linecards Performance Routing Engines www.cisco.com 33 uBR10012 - System Features • System Cards – Full card level redundancy with hot swap – Specialized card types for optimal density & performance • System Interconnect 31.5” – Reliable fully passive midplane – Speed independent point-to-point data path – Dedicated control plane interface – Dedicated redundancy state comm link • Power System – Dual redundant, load sharing power modules – DC and AC power options – 48 volt power distribution with local conversion 23” 17.5” • Cooling System – Front-to-back, bottom-to-top airflow – Modular, variable speed blower assembly – Failsafe design, replaceable online www.cisco.com 34 uBR10012 - Architecture Stratum 3 Clocks PRE Utility Card Route Processor Forwarding Processor System Clocks & Resets RF Linecards LAN / WAN Data Plane Control Plane www.cisco.com 35 uBR10012 - Performance Routing Engine Route Processor Fast Ethernet PRE Forwarding Processor PXF Engine • General purpose IOS processor SDRAM • Highly parallel “flow thru” switching & services engine IOS Processor Complex • ASIC based packet transfer and queue management DC/DC Converters DMA & Buffer Mgmt • Feature enhancements via microcode • Automatic failover to hot standby Packet Buffers • Online software upgrades 10 Base2 www.cisco.com 36 uBR10012 - Performance Routing Engine • General purpose IOS processor • Highly parallel “flow thru” switching & services engine • ASIC based packet transfer and queue management • Feature enhancements via microcode • Automatic failover to hot standby • Online software upgrades www.cisco.com 37 Cisco Parallel Express Forwarding (PXF) DMA Engine Current Next Context Context RAM RAM RAM RAM RAM RAM RAM RAM uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP uP MUX Packet Headers DEMUX Instruction CPU Core Memory Feedback Path • Each CPU module contains network processing element, DMA engine & memory • Parallel pipelines amplify available processing power to 32X single CPU • Memory access phasing between pipelines enables conflict-free sharing of I/O ports and column memories • Each CPU performs a separate section of the header processing operation • Each CPU executes a fixed length computation on its current context All CPUs switch from current context to new context in lockstep www.cisco.com 38 uBR10012 - Line Card Processor Ironbus Interface SDRAM PCI 10 Base2 Fast Ethernet • Allows reuse of all uBR7200 line cards in uBR10012 IOS Processor Complex uBR7200 Linecard • uBR7200 equivalent processor • Full IOS functionality • MAC layer & DOCSIS QoS application DC/DC Converters www.cisco.com 39 uBR10012 - Broadband Access Module Digital Burst Receiver Streaming Bus Ironbus Interface A/D • uBR7200 equivalent processor SDRAM PCI Upstream Port 10 Base2 Fast Ethernet IOS Processor Complex DC/DC Converters Cisco DOCSIS 1.1 MAC QAM Modulator Spectral Analysis RF Upconverter Downstream Port • Hardware acceleration of DOCSIS 1.1 functions • Integrated MAC level HW & SW • Cisco optimized advanced MAC / PHY technology • Embedded spectrum management • Optional integrated upconverters • Flexible, scalable architecture www.cisco.com 40 Leverage Existing Platforms www.cisco.com 41 uBR10012 • A new class of cable aggregation product • The only platform (shipping or announced) with unlimited scalability and optimized for aggregation • Intelligence at edge of network ==> More new services over the network ==> Increased revenue from the network • Industry leadership in reliability, density and performance • Broadens deployment options • The best of all worlds: best-of-breed product and best-in-class network solution www.cisco.com 43 uBR7100 Benefits Easy to own, simple to operate 1. Low cost 2. Low maintenance – minimal with fixed configuration 3. Low learning curve – runs IOS, based on other Cisco products 4. High interoperability – DOCSIS and EuroDOCSIS 1.0 Qualified 5. Simple setup – upconverter, IOS, & CNR all included www.cisco.com 44 uBR7100 Key Features • • DOCSIS and EuroDOCSIS 1.0 Qualified uBR7111 (1 Downstream, 1 Upstream) • Compact size: 2 Rack Units uBR7114 (1 Downstream, 4 Upstream ) • Based on time-proven Cisco uBR7200 & 7120 Two models: • Integrated upconverter, with an option to use external upconverter • Cisco IOS BPI IP+ image included — powers QoS, DOCSIS features • Cisco Network Registrar (CNR) included — for provisioning • NPE-175 processor delivers wirespeed throughput • Two 10/100BaseT Ethernet (TX FE) ports, and console, AUX ports • Optional WAN interfaces – Ethernet, FE, Serial, HSSI, ATM • DOCSIS version available now! • EuroDOCSIS available August 2001 www.cisco.com 45 uBR7200 Enhancements • Density – MC28C line card • Performance – NPE-400, NPE-1000,NSE-1 • Spectrum Management – MC16S software enhancements, DCMTA • Carrier Class Availability – HCCP • Software Features – DOCSIS 1.1, MPLS-VPNs, Cable Manager 2.0 • Increased Versatility – BNC connector option, new port adapters www.cisco.com 46 MC28C Product Description An extension of the uBR7200 line card products, the MC28C adds scalability to existing uBR7200 platforms. www.cisco.com 47 MC28 Line Card • uBR7200 with MC28C is the densest platform on the market today 8 downstreams, 32 upstreams per chassis 48 downstreams, 192 upstreams per rack • Significant increase in current density 100% increase in downstream 33% increase in upstream www.cisco.com 48 MC16S Spectrum Management Card • First DOCSIS line card to offer an integrated spectrum analyzer • Hardware-assist frequency hopping with software enhancements: Change modulation mode Reduce upstream channel bandwidth Shift upstream channel center frequency Hop to new center frequency in clear spectrum www.cisco.com 49 MC16S Benefits • Improves response time to ingress noise impairments • Eliminates “blind” and unnecessary frequency hops • Saves time and effort by MSO Operations Staff when troubleshooting cable plant impairments • Increases cable plant reliability • Improves percent of modems on-line www.cisco.com 50 Spectrum Management Enhancements Additional software enhancements include: • CNR-based hopping criteria • Dynamic modulation selection • Per-SID CNR measurements • Interface for Real-Time Spectrum Display www.cisco.com 51 DOCSIS Cable Modem Test Analyzer (DCMTA) www.cisco.com 52 UBR-MC28C-BNC • Quick and easy attachment/removal of coaxial cables • Reduces the amount of time taken to swap line cards • Decreases the duration of a plant outage www.cisco.com 53 Port Adapter Update • Adding support for following PAs on uBR7246VXR, uBR7246, uBR7223 Fast Ethernet: PA-2FE-TX, PA-2FE-FX Serial: PA-MC-2T1, PA-MC-2E1/120 ATM: PA-A3-8T1IMA (IOS release TBD) • Adding support for following PAs on uBR7246VXR Serial: PA-8T-V35, PA-8T-X21, PA-4E1G-120, PA-2E3, PAMC-E3, PA-MC-T3, PA-MC-4T1, PA-MC-8T1 ATM: PA-A3-T3, PA-A3-E3 DPT: PA-SRP-OC12SMX www.cisco.com 54 NPE-400 • NPE-400 is the highest-performance processor in the family of network processing engines (NPE) for Cisco uBR7200 series products Increased processing power by ~ 25% over NPE-300 • Improved price performance NPE-400 delivers improved performance at the NPE-300 price • Processor modularity and upgrade-ability • High service throughput www.cisco.com 55 Network Service Engine NSE-1 7200VXR PXF Processor Network Service Engine PXF PCI PCI PCI 10/100/1000 • Embedded PXF Processor for service acceleration • RM7000 Processor www.cisco.com 56 DOCSIS 1.1 Software • uBR7200 has supported DOCSIS 1.1 in hardware for almost 2 years • Many features of DOCSIS 1.1 already in shipping software • Full DOCSIS 1.1 was supported in production code, March 2001 • uBR7200 was submitted for DOCSIS 1.1 qualification in cert wave 16 www.cisco.com 57 Managed Access • uBR7200 already supports managed access for multiple ISPs via Policy-Based Routing • PBR works well in small to medium scale implementations • Managed access via VPNs using MPLS will be supported in February 2001 • MPLS-VPN provides a scalable, robust solution that protects the operator’s network www.cisco.com 58 Interface Bundling • Feature – Two or more cable interfaces can be bundled to create a single logical layer three (IP) interface • Benefit – Conserves IP addressing, eliminates the need for a bridged CMTS www.cisco.com 59 Cable Sub-Interfaces and MPLS-VPNs • Feature – Creates CM to uBR7200 sub-interface binding for use with MPLS-VPN VRFs and policy-based routing • Benefit – Allows MSOs to extend VPNs across the HFC infrastructure to the CM www.cisco.com 60 uBR905 and uBR925 Cable Access Routers • Targeted at SoHo, telecommuters and small branch offices • Integrated Cisco IOS router, cable modem, 4-port hub • Hardware-accelerated IPSEC (>2 Mbps @ 3DES) • Battery backup option on uBR925 • Two versions: uBR905 – Data-only, CableLabs-certified uBR925 – Adds 2 voice ports and USB, CableLabs submission in CW19 www.cisco.com 61 Cisco CVA122 Cable Voice Adapters • Consumer form-factor VoIP cable modems • Targeted for advanced residential and home office voice and data • Two Models CVA122: DOCSIS version CVA122E: EuroDOCSIS version • Flexible Voice Features VoIP on two FXS interfaces All codecs supported on both ports Wide voice signaling support including: H.323, SGCP, MGCP and NCS www.cisco.com 62 Redundancy options • Redundant P/S & WAN (No Upconv) • Redundant P/S, WAN & Upconv • Load-sharing 1:1 and N:1 (No HCCP) • Hot-standby 1+1 (HCCP) • Hot-standby N+1 (HCCP) (with and without RF switch) www.cisco.com 63 1+1 Redundant Configuration Failsafe coverage: per–Interface, inter–CMTS routers •Automatic detection of: Standby Active •Software crash •Cable wiring failure •Interface shutdown •Line card Online Insertion and Removal (OIR) •No active sessions dropped 1+1 Redundancy Configuration: 1. CMTS (Cisco uBR72xx) – 2 2. Modem Cards (MC1x, same PA types in the pairing) – 2x 3. Aggregation router – 1 4. IF upconverter with SNMP (Wavecom DUAL4040D) – 1 5. Combiner – 1 6. Splitter – 1 www.cisco.com 64 1+1 Redundant Configuration IP cloud Aggregate router Standby CMTS Router Active CMTS Router IF Upconverter w/ SNMP Combiner Splitter HFC www.cisco.com 65 Cisco 7200 CMTS 1+1 Redundancy Active CMTS Standby CMTS Downstream HCCP POWERFAULT DATA ALARM Splitter Upstream Active WaveComm Up converter W/SNMP POWERFAULT DATA ALARM Standby WaveComm Up converter W/SNMP Combiner HFC www.cisco.com 66 Cisco 7200 CMTS N+1 Redundancy Active CMTS Active WaveComm Up converters W/SNMP POWERFAULT DATA ALARM POWERFAULT DATA ALARM POWERFAULT DATA ALARM Downstream Upstream POWERFAULT DATA ALARM Active CMTS Active WaveComm Up converters W/SNMP POWERFAULT DATA ALARM POWERFAULT DATA ALARM POWERFAULT DATA ALARM POWERFAULT DATA ALARM HCCP Cisco RF Switch w/SNMP Active CMTS Active WaveComm Up converters W/SNMP POWERFAULT DATA ALARM POWERFAULT DATA ALARM POWERFAULT DATA ALARM POWERFAULT DATA ALARM Splitter Active CMTS Active WaveComm Up converters W/SNMP Combiner POWERFAULT DATA ALARM POWERFAULT DATA ALARM POWERFAULT DATA ALARM POWERFAULT DATA ALARM Standby CMTS Standby WaveComm Up converters W/SNMP HFC POWERFAULT DATA ALARM POWERFAULT DATA ALARM POWERFAULT DATA ALARM POWERFAULT DATA ALARM www.cisco.com 67 Cisco 10,000 CMTS N+1 Redundancy www.cisco.com 68 Agenda • Cisco CATV Solution • Product Update • The Cisco Advantage www.cisco.com 69 用户管理 都在CMTS上实现! • 用户信息识别和用户状态控制 如何认证合法用户的CM? 用户认证和授权 如何分配IP 地址:CM、用户 www.cisco.com 70 网络的可靠性 都在CMTS上实现! • 网络运营安全 用户IP/MAC 地址管理 用户间的访问控制 • 冗余设计 HCCP/HSRP www.cisco.com 71 业务管理 都在CMTS上实现! • 多种业务的支持能力 支持DOCSIS1.1 端到端的QOS 能力 多业务的开展和不同服务质量的要求 对业务的控制能力 • 灵活的用户业务管理功能 用户直接选择业务 为不同用户定制业务种类 www.cisco.com 72 计费策略 都在CMTS上实现! • 灵活计费策略 包月制 时长计费 流量计费 带宽计费 业务种类计费 www.cisco.com 73 网络健壮性 • 目前线路情况复杂,噪音影响比较大 • CMTS应该具有网络自适应能力 “跳频”功能 www.cisco.com 74 网络扩展性要求 • 支持DOCSIS1.1 • 各种密度的CMTS系统 • 具备第三层功能 隔绝广播 QoS控制 方便的网络维护 www.cisco.com 75 国内成功案例 HEILONGJIANG • 青岛广电 北京广电 • • • • • • • • • • • 上海广电 广东广电 上海广电 中山广电 深圳广电 新乡广电 新疆广电 通州广电 汕头有线 烟台有线 武汉有线 天津广电 郑州广电 杭州广电 珠海广电 大连广电 重庆广电 太原广电 佛山有线 山东广电 威海有线 . . . . www.cisco.com 76 Cisco Cable Leadership Over 200 Operators deploying uBR7200 today 85%+ Market share of DOCSIS/J112 CMTS market 65%+ Market share of worldwide CMTS market 15,000+ uBR7200 units shipped through 30-Mar-01 www.cisco.com 77 Cisco Cable Leadership First DOCSIS-qualified CMTS First mass deployed DOCSIS cable modem First voice-enabled cable modem First deployment of DOCSIS HSD to digital set top boxes First with MPLS support (Open Access) First / Only vendor to offer DOCSIS 1.0+ First / Only vendor to offer DOCSIS 1.1 First / Only vendor to deploy mass market VoIP over HFC Network www.cisco.com 78 Cisco Cable Leadership uBR7200 CMTS PRODUCTS First DOCSIS-qualified CMTS Only CMTS with production DOCSIS 1.1 hardware and software Only CMTS proven to scale to thousands of modems Only stable CMTS hardware/software platform Only CMTS based on proven, shipping product platform Only CMTS to offer true routed architecture Only CMTS to deliver carrier class reliability Only 2x8 line card Only integrated DVB-DAVIC line card Only integrated wireless line card www.cisco.com 79 Cisco提供完整解决方案 特色功能丰富 服务种类 业界领先的 MPLS 解决方案 www.cisco.com 80 Presentation_ID © 1999, Cisco Systems, Inc. www.Cisco.com 81