A.AMI
B.ESF
C.DUS
D.SSM
E.B3ZS
F.B8ZS
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A.DUS
B.line timing
C.loop timing
D.internal timing
E.through timing
A. ESF
B. PRS
C. DUS
D. SMC
E. B8ZS
A. J0 errors detected in a specified interval
B. errors detected in a given Errored Second (ES)
C. errors detected in a given Severely Errored Second (SES)
D. errors the encryption algorithm detects in a specified interval
E. Bit Interleaved Parity (BIP) errors detected in a specified interval
A. prevent the leakage of external fiber emissions
B. provide the optical network with the highest level of security possible
C. assure an even distribution of 1's and 0's for extended transmitter life
D. assure an adequate number of transitions for clock recovery at the receiver
E. prevent the receiver from assuming AIS inadvertently when all 0's are received
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
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
最新试题
Which timing mode is appropriate for a SONET NE that is adjacent to a SONET NE using BITS-1 timing source?()
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?()
Why are the 1300 nm and 1550 nm regions of the fiber spectrum primarily used for optical communications?()
Scrambling of SONET signals is done to ().
What are two important considerations when using 2- or 4-channel 15216 OADMs?() (Choose two.)
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?()
What are three relevant design considerations when using the 15216 EDFA? ()(Choose three.)
Click the Exhibit button. Given the following parameters: transmitter output (min): -2 dBm receiver input (min): -28 dBm 15216 Mux and Demux loss: 4.5 dB 16 channels maximum In which sites shown in the exhibit could the 15216 EDFAs be placed to minimize the number of EDFAs needed?()
If node 2 is accepting line timing from node 1, node 2 will send ()to node 1 as its SSM message.
What are three factors that limit the maximum distance of an amplified optical signal without regeneration? ()(Choose three.)