Some companies use RPR between routers to form the data backbone in
cable networks. RPR is not usually used in the transcontinental core networks. For
that purpose IP Routers connect the packet traffic and SONET/SDH transport devices
connect the circuit traffic. All of these technologies could ride on top of Wave Division
Multiplexing equipment.
Ongoing Developments
The growth of packet traffic and the necessity of supporting Ethernet and IP is driving
changes in all telecommunications equipment from the access (DSLAM) to metro
transport (PTS, MSPP, WD) and core (Routing and Optical Transport). Every part of
the network is under pressure to deliver, greater bandwidth, more control, better QoS,
higher availability, more rapid service delivery, and lower operational expenses. RPR
can be implemented in equipment in the access, metro and core portions of the network.
As the table at the end of the chapter shows RPR has been implemented in Broadband
Loop Carriers, DSLAMs, Packet Transport Switches, and Multiservice Provisioning
Platforms and Switch/Routers. Each of these categories of devices is evolving to support
the new business cases required by service providers offering the latest in broadband
services.
Pages:
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815