多项选择题

SONET Path Terminating Equipment (PTE) requires which three line codes to be supported for DS1 and DS3 circuits?（） (Choose three.)

A.AMI
B.ESF
C.DUS
D.SSM
E.B3ZS
F.B8ZS

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相关考题

单项选择题

Which timing mode is appropriate for a SONET NE that is adjacent to a SONET NE using BITS-1 timing source?（）

A.DUS
B.line timing
C.loop timing
D.internal timing
E.through timing

单项选择题

If node 2 is accepting line timing from node 1, node 2 will send （）to node 1 as its SSM message.

A. ESF
B. PRS
C. DUS
D. SMC
E. B8ZS

单项选择题

SONET Code Violations (CVs) totals in the PM tables are actually an accumulation of the number of （）.

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