Refer to the exhibit. Users report that when they dial to Cisco Unity Connection from an external network, they cannot enter any digits. Assuming only in-band DTMF is supported, what is a reason for this malfunction?
The negotiated RTP port is outside of the range described by RFC, so inband DTMFs do not work.
There is SIP Delayed Offer. DTMF is supported only in Early Offer.
The rtpmap:0 value for the negotiated codec is marking DTMF as inactive.
No DTMF is negotiated.
Correct answer: D
When you troubleshoot H.323 call setup, which message informs you that the called party is being notified about the call?
Correct answer: C
End users at a new site report being unable to hear the remote party when calling or being called by users at headquarters. Calls to and from the PSTN work as expected. To investigate the SIP signaling to troubleshoot the problem, which field can provide a hint for troubleshooting?