What method can be used to send DTMF tones?
A. UPDATE
B. C INFO
C. C MESSAGE
D. C NOTIFY
E. C OPTIONS
Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/sip/configuration/12-4t/sip-12-4t-book/voi-sip-dtmf.html
What method can be used to send DTMF tones?
A. UPDATE
B. C INFO
C. C MESSAGE
D. C NOTIFY
E. C OPTIONS
Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/sip/configuration/12-4t/sip-12-4t-book/voi-sip-dtmf.html