Most
providers still use several types of networks to offer Ethernet. A majority of carriers
leverage their installed infrastructure to offer Ethernet services over SONET/SDH
rings; this is a staple in carrier networks, but Ethernet is growing in the access space
to the detriment and displacement of SONET/SDH, which is beginning to lose favor as
measured in many data points in this study. In fact, Ethernet over WDM will be offered
by more respondents in and after 2007 (92 percent) than is Ethernet over SONET/SDH
(80 percent). Building a separate Ethernet overlay network is the choice of over half
of the Service Providers. Many large companies are willing to pay for the resiliency of
SONET/SDH, but small and medium companies expect to pay lower prices for Ethernet
services and need alternate paths. To reach small and medium businesses, Service
Providers are using Ethernet over IP/MPLS and Ethernet overlay networks that have
lower costs but with many hard SLA and resiliency options with carrier-class Ethernet
products.
Infonetics asked respondents to name the Ethernet services they offered besides
connectivity and bandwidth, in other words, what services are offered over their connections.
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