What method can be used to send DTMF tones?

What method can be used to send DTMF tones?
A . UPDATE
B . C INFO
C . C MESSAGE
D . C NOTIFY
E . C OPTIONS

View Answer

Answer: E

Explanation:

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/sip/configuration/12­4t/sip-12-4t-book/voi-sip-dtmf.html