Cisco 400-051 Exam

In Key Press Markup Language, which SIP request is used to deliver the actual DTMF digits?

  • A. SUBSCRIBE
  • B. INFO
  • C. NOTIFY
  • D. INVITE
  • E. ACK
Answer: Option C.
Explanation: 

KPML procedures use a SIP SUBSCRIBE message to register for DTMF digits. The digits themselves are delivered in NOTIFY messages containing an XML encoded body.

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