What method can be used to send DTMF tones?
Answer : E
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
Which statement is correct?
Answer : B
What does 1PCC mean?
Answer : A
What is the response to REFER when the REFER method is used?
Answer : A