A. ESF
B. PRS
C. DUS
D. SMC
E. B8ZS
您可能感興趣的試卷
你可能感興趣的試題
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
A. Slot 2 and Slot 4
B. Slot 4 and Slot 6
C. Slots 5 or 13 only
D. Slot 16 and Slot 17
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
最新試題
SONET Path Terminating Equipment (PTE) requires which three line codes to be supported for DS1 and DS3 circuits?（） (Choose three.)
SONET Code Violations (CVs) totals in the PM tables are actually an accumulation of the number of （）.
What is the phenomenon called where different wavelengths of light travel at different speeds?（）
How is a Thin Film filter fabricated?（）
Scrambling of SONET signals is done to （）.
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. The exhibit shows a 15454/15216 DWDM system and alarm indications. What are two possible sources of trouble shown in the system?（） (Choose two.)
What is the difference between the transmitted power and the sensitivity of the receiver?（）
What is an advantage of an externally modulated laser over a directly modulated laser?（）
Which timing mode is appropriate for a SONET NE that is adjacent to a SONET NE using BITS-1 timing source?（）