Huawei H31-311_V2.5 - HCIA-Transmission V2.5

In a WDM system, when the number of wavelengths is greater than ( ), the arrayed waveguide grating (AWG) is recommended.

The OTN signal has a fixed pad period, the same frame period as the SDH signal.

Which of the following is not the advantage of WDM?

After configuring PDH on a per-net element basis, the full trace cannot be searched. Which of the following is a possible cause? (Multiple choice)

output networks require higher costs than belt networks, but provide a more reliable management channel.

In MSP networking, when the optical fiber is connected between sites, the east light plate of the site is connected to the west light plate of the downstream site, and these stations are connected in turn to form a ring. In this case, the direction from the toko plate of the site to the wine light plate of the downstream station is the direction of the main ring, and the direction of forming the ring is the direction of service.

Single fiber unidirectional transmission provides higher bandwidth than single-fiber bidirectional transmission.

SDH signals must be scrambled before they can be transmitted over optical fibers. Which of the following bytes is not scrambled? (Multiple choice).

The difference between dispersion compensation fibers and ordinary optical fibers is that the dispersion compensation fibers have a negative dispersion coefficient at ().

Which of the following is the functional unit that provides serial data for the interface and system associated with the orderwire phone?