I'm trying to get voicemail to work with G.729a clients in pass-through mode, by simply using G.729a everywhere and not even dealing with transcoding, even from/to the carriers. I posted back in September asking about the sound file formats and how to playback native G.729a sounds files for the voicemail menus, to which Brian kindly responded, indicating that I need to remove the .wav extensions from sounds.xml and convert the sound files into their native format with the appropriate extension (ie vm-press.G729), and mod_native_sound would take care of the rest. That works great! For reference, here's that original thread: http://lists.freeswitch.org/pipermail/freeswitch-users/2008-September/006541... The problem I'm running into at this point has to do with calling into voicemail and leaving a message, recording your greeting, recording your name, etc. Voicemail is attempting to encode the audio stream into what appears to be PCM format, which fails since it is unable to decode the G.729 stream. Is there any way to have mod_voicemail store the recording, greeting, etc. it in it's native format without any transcoding (ie use mod_native_sound) to avoid this issue with transcoding? Someone posted a similar question on jira, but it doesn't look as though it had been answered ... http://jira.freeswitch.org/browse/MODENDP-46 Thanks for the help, Gabriel Kuri