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Ethernet has become the most popular interface to attach end users and access devices to the range of Ethernet and IP network services. This simple, low-cost, familiar technology is easy for end users to own and operate. A single Ethernet jack can support multiple connections and a wide range of access bandwidths, thus enabling end users to grow connectivity and bandwidth easily as needed. Ethernet services are often priced more inexpensively per unit bandwidth than legacy TDM-based services. With the emergence of COE, Ethernet now promises the same reliability, performance, and security of SONET/SDH, but with the low network cost and bandwidth flexibility inherent to Ethernet.
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