Refer to the exhibit. When a UC Administrator is troubleshooting DTMF negotiated by this SIP INVITE, which two messages should be examined next to further troubleshoot the issue? (Choose two.)
A. REGISTER
B. UPDATE
C. PRACK
D. NOTIFY
E. SUBSCRIBE
Suggested Answer: DE
This question is in 350-801 CLCOR exam
For getting CCNP Collaboration Certificate
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