"Note that the additional codecs discussed here are available for use in Asterisk's SIP channel driver, only. Asterisk 10 does not make them available for IAX2, MGCP, SSCP, H.323, UniSTIM, etc." Digium's fax driver doesn't work with IAX2... even in ulaw passthrough mode. So if I can find that yes, it's so much a problem with my configuration but a bug in the software, then I'll be satisfied & switch to what works (ie. SIP). -- Troy Telford