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UCCX - DTMF not working

Hello everyone, 

I'm configuring an IVR on UCCX that has a menu to dial the digit for the option the customer wants to talk to.

When calling from an extension registered on CUCM, the option is selected and forwards the call as I configured on the script. But when the call comes from PSTN, the DTMF digits are not passing to UCCX. For Unity Connection, DTMF is working fine for PSTN calls.

SIP Trunk on CUCM is set to No Preference.

Dial-peers are configured with dtmf-relay sip-notify rtp-nte and I tried to add sip-kpml, but the command isn't accepted. Router is 2811.

Please, could anyone help in troubleshooting this issue?

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