[Freeswitch-users] Early media: Sending 180 instead of 183?

hi, we are doing a lot with early media for playing soundfiles/messages to the caller without charging the caller, while they have to wait. we are doing a "pre answer" -> fs sends a 183 message -> we start a playback -> fs lets flow the media. the problem is, that it happens sometimes, that the caller can not hear anything. the problem might be, that in germany the specification ITU-T Rec. Q.1912.5 does not necessarily map the 183 message to ISUP. in germany it seems to be the best way, to start a playback with a 180 message instead of a 183 message. is it possible to make fs sending a 180 message without making a bridge (because we do not always want to connect to another target)? thanks and kind regards dennis