Refer to the exhibit.
Which DTMF relay method is advertised when the originating SIP gateway sends an INVITE message with a Call-Info header shown?
A. RFC 2833
B. SIP INFO
C. SIP NOTIFY
D. SIP KPML
E. In-band audio
Refer to the exhibit. Which DTMF relay method is advertised when the originating SIP gateway sends an INVITE message wi
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answerhappygod
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Refer to the exhibit. Which DTMF relay method is advertised when the originating SIP gateway sends an INVITE message wi
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