The decrease of optical power when light passes through a passive optical component is called the____. (Enter only letters.)
After a device is powered on, what need to be checked on subrack fans? (Choose all that apply.)
After GE services enter the client side of an OUT board that supports Ethernet services, they are encapsulated into OTN or SDH signals by the signal processing module. The alarm signals are processed in the same way between encapsulation into OTN signals and encapsulation into SDH signals.
When the TTI to be received at the PM layer is inconsistent with the TTI actually received at the PM layer, which of the following alarms will not be reported?