I'm currently running head (4687) but these problems have been unchanged since I've started playing with mod_conference about 2 months ago. I have tried a cross-product of two ITSPs (vitelity and teliax) either landline caller or cell caller mod_conference "native", or a javascript based on confroom.js I have found some differences in behavior in these 8 cases. 1. Missing 1 second of initial audio (callers don't hear the beginning of the "please enter your pin" message). It doesn't matter whether I move the session.answer() earlier. This happens except for {teliax, landline, *} 2. Doubling (and tripling) of incoming dtmf digits. It is quite hard to get it to accept a pin, because it keeps thinking I've entered a digit twice, when I haven't. As far as I can see, there is no user configuration to tune dtmf configuration (like min/max length of a tone, or echo cancellation). I also don't know if there is a way to force freeswitch/sofia to use only a particular dtmf system. Note that the problem seems worse when running javascript confroom.js, but it happens both ways. This happens with both ITSPs. I see it except for {*, landline, native mod_conference.c}. Any suggestion for causes, fixes, ways to diagnose further, etc., are welcome. -mda