Qwest® Asynchronous Transfer Mode (ATM) Service uses state-of-the-art networking technology that enables multi-service solutions to encompass virtually all of your applications. Qwest ATM Service runs over a secure, private network and is backed by class of service (CoS)/quality of service (QoS). ATM technology ensures that the most critical traffic receives the greatest resources and the best service. It is designed for multiple locations, using multiple applications within an enterprise network.
ATM services provide a high-speed, secure and reliable solution that integrates your data, voice and Internet traffic over a single network. Qwest designs broadband solutions to fit your business needs that can include various ATM Service categories including:
ATM Service uses high-speed ATM networking technology to bundle information into fixed segments called cells, based on industry standards governed by the ATM Forum. The ATM protocol supports many different business applications within an enterprise network, prioritizing each application based on its bandwidth and QoS needs. ATM Service supports speeds from 1.544 Mbps to 622 Mbps. An ATM network can be IP-enabled using optional Smart PVC technology. Smart PVC offers network-based IP-enabled functionality that provides efficient, scalable, high-performance any-to-any connectivity. ATM Service requires the use of customer premises equipment (CPE) that puts customer data into cells suitable for transmission over the Qwest ATM network. The CPE must conform to industry standards and be purchased separately from ATM Service.
Customer information travels across a single physical access link (local loop) connecting the customer to the Qwest® network at an ATM service point. The information (data, video, Internet and/or voice) is segmented into fixed-length cells of 53 bytes (five-byte header and 48-byte user payload). This fixed-length cell gives ATM its efficiency at transporting data quickly. At the ATM service point, information is sent across virtual logical connections simultaneously to multiple destinations. These virtual connections are logical—they are defined in software or in the memory of networking devices. The ATM switching hardware knows where each cell begins and ends. The cell-addressing information is always in the same place, the cell header. By reading some basic information in the cell header, the Qwest ATM switch knows where to send the information. The cell header identifies the logical connection and the information is delivered to its destination. The switching hardware makes the routing decision only at connection setup and does not have to make a routing decision for each cell.
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