Click the Exhibit button. What is the maximum allowable loss budget between the ONS 15216 Mux （left side） composite output and the ONS 15216 Demux （right side） composite input， with the optical values given in the exhibit？ （Assume the worst case loss of 4.5 dB for 15216 200 GHz Mux/Demux and ignore power penalties or extra margin.）  （）

SDH Code Violations （CVs） totals in the PM tables are actually an accumulation of the number of（）.

Which two can be transported in one AU-4？ （）

In the OSNR model for EDFA amplifiers， SNR OUT = 1/（1/SNR IN + FhvB/P IN ）， what does SNR IN represent？（）

A VC-4-4c consists of （）.

How is SNCP and MS-SPRing traffic rerouted during a protection switch when a complete fiber cable cut occurs？（）

A 2.5 Gb/s （OC-48 or STM-16） optical signal with a dispersion tolerance of 1200 ps/nm goes through fiber with 18ps/nm*km of dispersion. How many 15216-DCU-350 equivalents are needed for enough compensation after traveling 100 km？（）

What are three factors that limit the maximum distance of an amplified optical signal without regeneration？ （）

What protection method is used in 4F MS-SPRing networks？（）

In order to avoid misconnections due to a failed node in an MS-SPRing， Alarm Indication Signals （AISs） are sent on every channel normally terminating in that node. What is the name of this process？（）