The network was also built
because of its efficient use of all bandwidth by best effort services when it is not
being used for high priority services.
The cable MSO??™s in the U. S. have also been actively deploying RPR. Cisco has installations
of prestandard RPR (DPT) throughout the U. S. cable industry. More recently ,Cox
Communications, Time Warner Cable, Comcast Cable, and Adelphia have installed RPR
based rings for their internet access and video requirements. Farther north, Canada also
has significant installations of RPR. Bell Canada and Telus both have RPR network
installations to provide packet and circuit services in their operating areas.
Service Providers and Utility Networks in Asia Japan Telecom Co., Ltd. a part of the
Softbank Group has built a nationwide network using RPR technology. The Otoku Line
services are enabled by the QoS and resilience of RPR. This service has been available
since December 2004.
In China utility companies are becoming significant communication service providers
both for their own operations and as a service for their customers. One organization
that is developing a large regional RPR network is the Central China Power Group.
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