Next, the glory of SONET! In a ring architecture, where SONET automatic protection switching is employed, the best of all worlds comes to fruition. In this topology, ADMs are used throughout the network, and a series of point-to-point links are installed between adjoining neighbors. The bidirectional capability places the most robustness into the network; however, unidirectional services can also be installed. The primary advantage of the ring architecture is survivability in the event of a cable cut or a failure in a network node. The multiplexers have sufficient intelligence to reroute or reverse direction in the event of a failure. If more than one fiber link is installed, the systems could use alternate paths, but they must recover in milliseconds (which APS on SONET is designed to do). Figure 29-14 shows the ring topology with dual fibers run (bidirectional service) between the ADMs.
Was this article helpful?
The Easy Formula To Making Money With Iphone Apps. The exemplary development of technology from then till now has helped everyone in all aspects of our lives. Essential factors including social, physical, mental, and the like have been touched by these mechanics making our existence so easier.