If no bit error test is performed on a optical channel for 10 minutes, the local end uses the SDH analyzer to connect to the client-side port on the OTU board, the client-side port on the opposite OTU board need to be self-looped by a fiber. In the case of self-loop, a fixed attenuator must be added.
In the scenario where the non-convergence OTU processes OTN standard signals, both A and B are WDM sites.The OTU at station A accesses four channels of R_LOS signals on the client side. After being processed in the middle part and on the WDM side of the OTU at station A, the alarm signals are then sent to station B. The ODUk_PM_AIS alarm of the corresponding channel is generated in the middle part of station B. The ODUk_PM_AIS alarm is detected in the client device.
MPLS APS is a network protection mechanism. It implements service switching by using the MPLS OAM detection function.
Which of the following is not a precaution after board replacement?
In the case of the OptiX OSN equipment, when the standby board is normal, which of the following operations does not cause the active/standby switching of the cross-connect board or clock board?
Which of the following statements about the line fiber quality monitoring performance parameters is wrong?
Which of the following standards must be met for the isolation test in the feature test of the multiplexer/demultiplexer?
The OSN 1800V supports the following packet protection features:
Which of the following statements about MPLS is wrong?