A. fibers are terminated incorrectly on a node
B. the channel number in the received K1 byte is not identical to the channel number transmitted in the K2 byte
C. the channel number in the received C1 byte is not identical to the channel number transmitted in the C2 byte
D. the channel number in the received C2 byte is not identical to the channel number transmitted in the C1 byte
E. the channel number in the received K2 byte is not identical to the channel number transmitted in the K1 byte
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A.255
B.512
C.1024
D.4096
A.line timing
B.loop timing
C.internal timing
D.through timing
E.external timing
A.2
B.3
C.4
D.20
E.22
F.24
A. VT circuits
B. STS circuits
C. VT tunnel circuits
D. 1:1 protection circuits
E. 1:N protection circuits
Click the Exhibit button. Given the information shown in the exhibit, when creating 2 DS1 circuits, how many STS ports are used on the VT1.5 matrix at Node 1 as VT circuits and how many are used after using VT tunnels?（）
A.2；0
B.3；2
C.3；5
D.4；0
E.6；0
F.6；2
最新試題
How is UPSR and BLSR traffic rerouted during a protection switch when a complete fiber cable cut occurs?（）
For lasers with tightly controlled wavelengths, approximately how far apart are the centers of adjacent wavelengths when 100 GHz spacing is used in a DWDM system?（）
Given the formula: (Fiber Attenuation * Km) + (Splice Attenuation * # of Splices) + (Connector Attenuation * # of Connectors) + (Optical Fiber or OADM) + Buffer(Fiber aging)) With regard to SONET/SDH optical calculations, what will the given formula provide?（）
In order to avoid misconnections due to a failed node in a Bidirectional Line Switched Ring (BLSR), Alarm Indication Signals (AISs) are sent on every channel normally terminating in that node. What is the name of this process?（）
What three in combination are factors that can cause four-wave mixing in fiber-optic cables? （）(Choose three.)
Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems? （）(Choose three.)
Which timing mode is appropriate for a SONET NE that is adjacent to a SONET NE using BITS-1 timing source?（）
What is the phenomenon called where different wavelengths of light travel at different speeds?（）
How is a Thin Film filter fabricated?（）
What are two important considerations when using 2- or 4-channel 15216 OADMs?（） (Choose two.)