[Freeswitch-users] start_dtmf_generate during early media?

Hey everyone, I'm trying to terminate a call over a voip carrier to an AT&T conference bridge. AT&T (who, of all people, should know better) are playing the prompts for the conference bridge over early media. And of course, you can't connect to the conf. bridge because no DTMF is transferred (because the call isn't answered yet). So the question is, is there a way to force FreeSWITCH to transcode 2833 DTMF from the A-leg and send inband DTMF on the B-leg while the B-leg is in early-media state? I see there is the start_dtmf_generate application, but will this work if the b-leg is still in the early-media state? Thanks!