[Freeswitch-users] correct way to send out dtmf type in gateway

Hello all, what is the correct way to send out a dtmf type other than rcf2833? via a gateway? i have this telepacific number that goes to IVR when called,it doesn't accept any options pressed when i call from a sip ipphone(flowroute) it will start working though when start_dtmf_generate is started. dp <extension name="telepacific" > <condition field="destination_number" expression="^(18774878349)$" > <action application="start_dtmf_generate" /> <action application="bridge" data="sofia/gateway/Flowroute/$1" /> </condition> </extension> how do i exactly set a dtmf type? ding