What is the cause of the issue?

exams 350-801 V4 350-801 exam 0 Comments

Refer to the exhibit.

The SDP offer/answer has been completed successfully but there is no DTMF when users press keys.

What is the cause of the issue?
A . Payload type 110 was negotiated rather than type 101.
B. DTMF was negotiated property in these messages.
C. DTMF was not negotiated on the call.
D. G.729 rather than G.711ulaw was negotiated.

Answer: C