Question 61
In the case of SNCP, the board selectively receives the service. Therefore, SNCP can protect services on the line.
Question 62
In WDM systems, when fewer than () wavelengths are used, it is ideal to use dielectric thin film filters (TFFs).
Question 63
The encapsulation formats of TMD E1 service PWE3 mainly include SAToP mode and CESoPSN mode. The main difference lies in whether the structure and processing overhead of TDM signal are perceived.
Question 64
PDM uses a polarization beam splitter to divide the laser into two vertical directions: x and y.
Question 65
The SDH frame structure is a rectangular block frame based on which of the following options?