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CBX 500® Multiservice WAN Switch

The widely deployed 5 Gbps Nokia CBX 500® Multiservice WAN Switch delivers carrier-class ATM, frame relay, circuit emulation, and IP services. Support for a wide range of input/output (I/O) modules and a distributed I/O module-based processing design enable the CBX 500 switch to offer high port and service densities from a compact chassis.

Flow control conserves network resources by using switch-to-switch signaling to manage congestion at the network edge. The high-performance switching fabric, modular architecture, and cross-point technology enable you to cost-effectively grow your edge network.


Use the CBX 500® Multiservice WAN Switch to cost-effectively aggregate Layer 2 and Layer 3 edge services.

  • Scale, simplify and consolidate public networks
  • Avoid costly overlay networks by adding IP services to your existing ATM and frame relay network
  • Generate new revenue opportunities with flexible bandwidth services based on Inverse Multiplexing over ATM, multilink frame relay, and subrate capabilities
  • Gain voice, video, and data support that is flexible enough to capitalize on new market opportunities
  • Leverage limited real estate and simplify your physical plant with high-density service modules
  • Simplify network operations and speed service activation with end-to-end network and service management
  • Differentiate ATM, frame relay, IP and MPLS services with Quality of Service (QoS), and preserve Service Level Agreements (SLAs)
  • Benefit from proven, carrier-class performance and reliability


The scalable, reliable CBX 500® Multiservice WAN Switch supports multiple services with unified network management.

High-port density, multiservice support, and proven reliability deliver superior price/performance

  • Supports a wide range of high-speed, high-density service modules, including 8-port T3/E3, 4-port OC-3c/STM-1 modules and 1-port OC-12/STM-4 modules
  • Interchangeable service modules with the CBX 3500® Multiservice Edge Switch provide greater investment protection and flexibility
  • High port-densities, high VC support and distributed routing and signal processing increase scalability
  • Flow control gives you the tools to run rt-VBR (real-time - Variable Bit Rate), nrt-VBR, ABR (Available Bit Rate) and UBR (Unspecified Bit Rate), and ensure fairness in the network for all services

Fault-tolerant architecture delivers proven carrier-class reliability and service availability

  • Redundancy protection for key modules: 1+1 Automatic Protection Switching (APS)/Multiplex Section Protection (MSP) on SONET/SDH interfaces help support non-service impacting upgrades and protect against card failures
  • Routing and signaling protection: Distributed routing and signaling control help avoid single points of failure. If a network or service disruption occurs, priority-based routing of hundreds of thousands of circuits per second quickly restores services
  • Reliable architecture: Fully redundant hardware, control, and power components protect against hardware failures and reduce network downtime. If a failure occurs, automatic failover, Stratum 3 holdover timing and hot-swappable modules can restore services quickly without losing data

Robust software architecture helps reduce costs and simplifies network management

  • The carrier-class, feature rich MXOS™ Multiservice Switch Operating Software simultaneously supports ATM, frame relay, and IP services – providing exceptional reliability, service flexibility, and investment protection.
  • Proactive network data collection and analysis tools can reduce operating costs by quickly identifying problems with the potential to disrupt services.
  • Management software offers extensive configuration, performance management, point-click-done provisioning and security support for multiple services from a single platform.