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The download and upload speeds for home users of DSL is highly unpredictable and depends on the number of people connected to the same line. This unpredictability makes DSL unsuitable for critical business use, where users and applications like IP telephony and video conferencing require guaranteed bandwidth.
ntl:Telewest Business, part of the Virgin Media group, has upgraded its network infrastructure to offer Class of Service options (CoS) on its DSL service. Class of Service (CoS) is a way for users to identify types of network traffic that require more bandwidth. The CoS from ntl:Telewest would enable smaller businesses and those that need to connect multiple branch offices to benefit from traffic prioritisation throughout their network, ntl:Telewest said. Such prioritisation would ensure that users, branches and core applications obtain the bandwidth they need.
"For the first time, businesses can exert the same control over traffic on their DSL lines as the rest of the network," said Stephen Beynon, MD of ntl:Telewest Business. "This makes the use of IP voice and other performance-sensitive applications a reality to all users of the network, not just those on the core. It will mean businesses really can capitalise on these applications for their home workers and smaller offices."