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

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

View Answer

Answer: 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.