Refer to the exhibit. Users report that when they dial to Cisco Unity Connection from an external network, they cannot e

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answerhappygod
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Refer to the exhibit. Users report that when they dial to Cisco Unity Connection from an external network, they cannot e

Post by answerhappygod »

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?
Refer To The Ex 1
Refer To The Ex 1 (16.24 KiB) Viewed 59 times
A. The negotiated RTP port is outside of the range described by RFC, so inband DTMFs do not work.
B. There is SIP Delayed Offer. DTMF is supported only in Early Offer.
C. The rtpmap:0 value for the negotiated codec is marking DTMF as inactive.
D. No DTMF is negotiated.
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