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Which statement describes the delay variation requirement of the voice service for the IP bearer network?

Which statement describes the delay variation requirement of the voice service for the IP bearer network?
A . No strict requirement
B . Bearer network delay variation + 1s
C . Bearer network delay variation +100 ms, allowed maximum delay variation +200ms
D . Bearer network delay variation = 10 ms. Allowed maximum delay variation =20ms

Answer: D

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