A.DUS
B.line timing
C.loop timing
D.internal timing
E.through timing
您可能感興趣的試卷
你可能感興趣的試題
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
最新試題
How is UPSR and BLSR traffic rerouted during a protection switch when a complete fiber cable cut occurs?（）
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?（）
Which timing mode is appropriate for a SONET NE that is adjacent to a SONET NE using BITS-1 timing source?（）
What are two important considerations when using 2- or 4-channel 15216 OADMs?（） (Choose two.)
Click the Exhibit button. When designing a DWDM system with multiple amplified spans, a pre-amp is needed at Site B to （）. (Choose three.)
Click the Exhibit button. Which type of multiplexer is shown in the exhibit?（）
What are three relevant design considerations when using the 15216 EDFA? （）(Choose three.)
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 three in combination are factors that can cause four-wave mixing in fiber-optic cables? （）(Choose three.)
A Channel ID mismatch occurs when （）.