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350-801 · Question #80
350-801 Question #80: Real Exam Question with Answer & Explanation
The correct answer is D: DTMF was not negotiated on the call.. It is offered 18 (g729) and 110 (type-event), however the answer only contains 18. Therefore, DTMF was not negotiated.
Protocols and Endpoints
Question
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?
Options
- APayload type 110 was negotiated rather than type 101.
- BDTMF was negotiated properly in these messages.
- CG.729 rather than G.711ulaw was negotiated.
- DDTMF was not negotiated on the call.
Explanation
It is offered 18 (g729) and 110 (type-event), however the answer only contains 18. Therefore, DTMF was not negotiated.
Topics
#SDP#DTMF#SIP Signaling#Troubleshooting
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