Click the Exhibit button. Which type of protection is shown in the exhibit?（）
A.1+0
B.1+1
C.1：1
D.1：N
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A.0
B.1
C.2
D.3
E.4
A. signal fail, signal degrade, manual switch
B. signal degrade, signal fail, manual switch
C. protection lockout, manual switch, path AIS
D. forced switch, manual switch, signal degrade
E. protection lockout, manual switch, forced switch
A. Switch times would exceed 50 ms for an OC-3 BLSR ring.
B. An equal amount of working and protect bandwidth is required.
C. DCC bandwidth is not large enough to handle K1/K2 processing.
D. There is not enough bandwidth in an OC-3 ring to justify BLSR protection.
A. It protects signals against node failures between rings.
B. It protects signals against node failure within a single ring.
C. It allows for traffic to be preempted when a ring switch occurs.
D. Traffic can be dropped and continued at interconnecting nodes.
E. It protects preemptible traffic from being dropped when a ring switch occurs.
A.LEX
B.HDLC
C.GFP-F
D.PPP/BCP
最新試題
What protection method is used in 4F BLSR networks?（）
Scrambling of SONET signals is done to （）.
What are three relevant design considerations when using the 15216 EDFA? （）(Choose three.)
Why are the 1300 nm and 1550 nm regions of the fiber spectrum primarily used for optical communications?（）
What are three factors that limit the maximum distance of an amplified optical signal without regeneration? （）(Choose three.)
What is the phenomenon called where different wavelengths of light travel at different speeds?（）
What three in combination are factors that can cause four-wave mixing in fiber-optic cables? （）(Choose three.)
UPSR protection switching is initiated by （）, while BLSR is initiated by （）.
The ONS 15216 is a 32-channel system. The ONS 15216 OADMs are capable of adding and dropping one, two, or four channels. How are the OADMs provisioned to add and drop specific channels?（）
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.)