You have configured enough SIP channels to carry the expected communications load, but users are reporting that sometimes they cannot call out and callers cannot get through.
Based on the information in the exhibit, what is causing the problem?
Refer To The Ex 1 (63.36 KiB) Viewed 45 times
A. The system is ignoring refresh messages.
B. The caller ID is not passed by some carriers.
C. The callers are being referred incorrectly.
D. The timer should be set to 2 minutes.
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