In multi-node centralized network scenario, regardless of the refresh registration situation, suppose A is SIP user of branch node 1, B is SIP user of branch node 2, A and B are on the phone; at this time, the network between branch node 1 and branch node 2 interrupted, then ()

In multi-node centralized network scenario, regardless of the refresh registration situation, suppose A is SIP user of branch node 1, B is SIP user of branch node 2, A and B are on the phone; at this time, the network between branch node 1 and branch node 2 interrupted, then ()
A . the call of A, B will be interrupted
B . the call of A, B will flash in the event of a network failure the moment, then resume
C . the call of A, B will not be affected
D . None of the above

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Answer: A