| 摘要 |
The invention includes a system for transporting type one traffic downstream from a service provider router to end user terminals by replicating the type one traffic at a first network layer and transporting type two traffic upstream from the end user terminals to the service provider router by merging the type two traffic at a second network layer, where the first and second network layers are different. One apparatus according to the invention includes a plurality of unidirectional egress ports configurable for transmitting type one traffic towards a plurality of type one nodes adapted for replicating the type one configurable for receiving type two traffic, and a merging unit coupled to the plurality of unidirectional ingress ports, wherein the merging unit is adapted for merging the type two traffic at a second network layer.
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