The FOXMAN-UN NP Point of View
As an example the following application has been configured using the configuration management interface of FOXMAN-UN BP.
The service that has been defined can be seen as a data connection between two LEDE1 sub units.
The two Endpoints, also called A and Z points, are located in NE82 and NE80.
end-to-end connection before NP
The NE81 is used only as a pure cross-connect to pass the traffic from NE80 to NE82.
The whole model will be represented after FOXMAN-UN NP configuration as follows:
The Application using Trails and Circuits
The LEDE1 P0_nc circuit starts in the NE82 using a Matrix Connection (MC) to the STM-4 port unit of SAMO1. From there a STM-4 physical connection is established to NE81 which will work as a pure Digital Cross Connect (DXC). This connectivity is known in FOXMAN-UN BP as STM-4 Section or VC4 Topological Trail in FOXMAN-UN NP.
The SAMO2 in the NE81 will allow you to bypass the P0_nc channel via the MC between STM-4 Port 4 and STM-16 Port 2. Again a Topological Trail between NE81 an NE80 will allow the termination of that P0_nc in NE80 using the LEDE1 tributary interface.
The whole construct is called a P0_nc Circuit.
The scheme above visualizes all the different layers to build up the described construct of the P0-nc Circuit. This construct is also applicable in FOXMAN-UN NP and it will be explained in the following paragraphs.