The WDM optical layer ASON DCC D4-D12 setting pass-through has no effect on ASON

Network elements A, B, and C are OSN 3500 forming a chain network. The two stations A and C are connected to routers. The IP routers are connected to the OptiX SDH equipment through the POS port of STM-1. The PAS port connects J1 and C2 bytes. It is also used as a payload to transfer bytes (used to carry services). The network element A to the network element C creates a VC4 service, and the network element B uses VC4 to pass through.
In this case, is there an alarm report inside the SDH network?

Which of the following operations may be caused by non-linear effects

The type of software to be loaded in the OSN product upgrade process includes the basic BIOS. Then, what are the main functions of the basic BIOS? (multiple choice)

Regarding system security planning and reliability planning, which of the following is correct (multiple choice)