Do you also see the MCD subscribe to KPML?
"SipUA::Subscribe request: from=sip:ap@192.168.1.200"
(Should be right after the invite.)
Then during call you should see RX and TX of DTMF
Tx Codec: RTP_CODEC_DTMF , PT: 101 , M: 0, SeqNum: 162, TS: 25400, SSRC: 479491032, rtpLen: 4 DTMF: Event: 1...