Point-to-Point with Optical Regenerator

In this topology we will consider a straightforward point-to-point topology but with a regenerator (3R) inline. What we can see happening here is that all three layers have their respective trails terminated at the regenerator. This is because the regenerator is affecting the individual signals at the highest optical channel layer. By doing 2R or 3R regeneration on the entire signal requires disturbance and manipulation of the individual client signals at the OC layer. Consequently, these changes to the client signals require subsequent changes to be made at the lower OMS and OTC layers.

In this regeneration example, we can see that the trails in all of the layers are affected by performing, 2R or 3R regeneration of the signal. Consequently, all the OCh and OMS trails sink at the regenerator and new trails are spawned and sourced again at the regenerator’s line output. 

Again, if this equipment is going to be OTH (G.709) compliant it must have the capability to understand, process, analyze the OTH OH, and to act accordingly.