Beta Draft Confidential
Overview
CBX 500 Features
CBX 500 Multiservice WAN Switch Hardware Installation Guide 4/5/031-3
• Protocol translation features
• Usage-based billing capability
• Congestion management based on Lucent’s VNN packet routing for large network
support, which includes:
– End-to-end delay
– Cell delay variation and cell loss ratio
– Administrative path control
– Virtual private networks (VPNs)
– Sophisticated support for point-to-multipoint connections
• Support for the four ATM service classes:
– Constant bit rate (CBR)
– Variable bit rate-real-time (VBR-RT)
– Variable bit rate-non-real time (VBR-NRT)
– Available bit rate/unspecified bit rate (ABR/UBR)
• ATM flow-control processing support enabling service providers to manage
traffic proportionately on a per-circuit basis (for ABR, UBR, and VBR-NRT
service classes) according to service agreements
• Ten quality-of-service (QoS) classes implemented via hardware buffers
(one CBR, four VBR-RT, four VBR-NRT, and one ABR/UBR)
• SVC support for UNI 3.0, UNI 3.1, and IISP interfaces
• Addressing support for E.164, network service access point (NSAP), data country
code (DCC) ATM end-system addresses, and international code designator (ICD)
ATM end-system addresses
• Encapsulated forward congestion indicator (EFCI) marking and discard
• Interim Link Management Interface (ILMI) and address registration on each port
• Three system-timing modes: recovered, external, or internal
• Four transmit timing and synchronization modes: loop, recovered, external, or
internal
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