Resilient Packet Ring (RPR) 369
According to ATT the OptEring service extends the reach of simplified Layer 2
Ethernet LAN infrastructure across the metro, region or nation. It also supports any
mix of TDM and packet traffic. This is a crucial requirement as the mix of circuit and
voice traffic evolves and changes over time. It also reduces the need for multi-protocol
routers between customer locations simplifying equipment and reducing costs for ATT??™s
customers. In the ATT SLA they offer 24 ?— 7 ?— 365 performance monitoring and management.
It is recommended for mission-critical applications that require continuous
availability and for applications that have unpredictable network demand.
Another large service provider in the US, Verizon, also offers packet services over
RPR. The Verizon network, with 11.2 million fiber miles and 6000 SONET rings, is one
of the largest in the world. Their RPR offering called EDSR supports Ethernet LAN
services. In the US Verizon offers Ethernet (E-LAN services) in 55 metro markets and
it also offers the service in 9 European countries. The Verizon service brings simplicity,
flexibility, reliability, and total cost of ownership (TCO) advantages that are unmatched
by other service types.
Pages:
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834