asterisk users - Aug 2005 - g729 pass-thru for sip provider and g711 ulaw for conference and voicemail

Hello,

I'd like to use g729 pass-thru when I dial out to a sip provider from my
IP phone but because I have no license for g729 I'd like to use g711 ulaw
for asterisk voicemail, conference bridge and other services.

When I set in [general] section of sip.conf the following:

disalow=all
allow=g729
allow=ulaw

the g279 pass-thru works fine with my SIP provider but
when I call the conference extention the call gets dropped because it
wants to use g729 as well but there is no license. Would it be possible to
use g711 ulaw in this case somehow?

Any ideas?

Thanks.

Regards, Gyorgy