Is the following description correct? Users can establish PVC connections between different board ports or between different ports on the same board. The main purpose is to realize the point-to-point interconnection between two different users.

What is the role of the integrated access device UA5000 in the NGN network?

PVM packet voice processing board, which manages and controls the narrowband user board in the UA5000 chassis. What are its main functions?

Is the following description correct? The VPI/VCI of the ATM cell has only local importance, and the VPI/VCI value of each node in the transmission process can be changed.

What are the VLAN attributes supported by MA5680T?