A. Each fiber has half of its SONET capacity reserved for protection.
B. Two fibers in the span carry working traffic, while the other two fibers in the span are reserved for protection.
C. The signal is sent simultaneously in both directions around the ring. The receiver determines which fiber to listen to based on signal quality.
D. The signal is sent simultaneously in both directions around the ring. The transmitter determines which fiber has the working bit set for the receiver to acknowledge.
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A. DS-1; E1
B. DS-1; STM-1
C. OC-3; STM-1
D. STS-1; STM-1
E. OC-192; STM-192
A.AMI
B.ESF
C.DUS
D.SSM
E.B3ZS
F.B8ZS
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
最新試題
Which is a legitimate bandwidth matched pair?（）
UPSR protection switching is initiated by （）, while BLSR is initiated by （）.
What are two important considerations when using 2- or 4-channel 15216 OADMs?（） (Choose two.)
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.)
Click the Exhibit button. Which type of multiplexer is shown in the exhibit?（）
SONET Path Terminating Equipment (PTE) requires which three line codes to be supported for DS1 and DS3 circuits?（） (Choose three.)
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?（）
What protection method is used in 4F BLSR networks?（）
Why are the 1300 nm and 1550 nm regions of the fiber spectrum primarily used for optical communications?（）