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Building an ATM Wide Area Network July 26, 1999 By David Willis If you're in a distributed enterprise and your wide area bandwidth needs are on the rise, an ATM WAN backbone can provide the growth that you're after. At the high end, ATM delivers bandwidth at DS3, OC-3, OC-12, and beyond. At the low end, T1 and Inverse Multiplexing over ATM (IMA) over T1 circuits provides affordable access. Existing frame relay backbones can be merged with and/or migrated to an ATM infrastructure using Frame Relay to ATM service interworking. Beyond raw capacity, the primary benefit of an ATM backbone is reliable consolidation of traffic types. Historically data, voice, and video networks have proliferated in parallel ISDNVideo, VoiceNet, DataNet PDF Charts each with their own equipment, circuits, management systems, and management personnel. As the speeds in the data network increase while its cost plummets, the data network's capacity relative to the voice and video networks makes it an attractive choice for carrying all traffic types, simplifying management and reducing cost.
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