A Section at any speed between an FOX51x or FOX61x and an NE of type FO does not lead to the creation of the associated Trail hierarchy as shown in the previous Section for connecting Sections between two FOX51x. This can’t be done since the FOXMAN-UN BP does not provide any information about the cross connections inside the NE of type FO.

The FOXMAN-UN NP uses the extremity on a NE and copies it into the NE of type FO. It then uses those two points to create a Topological Trail.

Thus, an Application that has been created to handle a Section between an FOX51x or FOX61x and an NE of type FO contains only one Trail.