Connolly cites TCI, on the other hand, as a prime candidate for its digital reverse product and points to the operator s Fremont, Calif., system as an ideal application environment. This approach required two separate fibers from each node and essentially equated to eight times as much reverse traffic. Moreover, with the increased loop reach, the CMTS and telephony could be pushed further upstream, eliminating the need, and cost, of putting this equipment in multiple hub sites, which now would require only passive multiplexers to handle upstream signals. At that OTN, you want to efficiently gather up all of the return traffic. You want to get it onto a small number of fibers, through WDM, frequency stacking, digitizing and using TDM, or combinations of these.
Operators actively involved in system clustering also stand to profit from the technology.
GI, for example, says the transition is virtually seamless to the operator that already has installed its SG Optical Nodes. Our digital return design is going to be made such that you can remove an analog laser module and plug in a digital return module, and it ll be transparent. We don t want to make them have to buy a new node, obviously. What others are saying Digital baseband reverse has received a lot of attention. It offers a cost-effective implementation for small nodes by allowing an operator to efficiently multiplex upstream digital payloads and eloquently process them at secondary hub sites.