NEC UPD98413 User Manual page 97

(Example) When MD = 3 and MT = 4
Ο : Less than LD errors are detected in the ND frame.
× : LD or more errors are detected in the ND frame.
∆ : Less than LT errors are detected in the NT frame.
N frame
Ο ×
Three consecutive frames
Degradation 1
indication 0
CHAPTER 3 FUNCTIONAL OUTLINE
× × × ∆
Four consecutive frames
PRELIMINARY
∆ ∆ ∆ ×
NEC confidential and Proprietary
×
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