[Asterisk-Users] Need some help with G729 passthru

[Brian McCrary]

I'm trying to get Asterisk to pass thru calls using the G729 codec.
I've got a 7960 phone and my gateway is an AS5400.  I got the following
messages when debugging SIP (7778881000 is the 7960):

WARNING[1872]: channel.c:2115 ast_channel_make_compatible: No path to
translate from SIP/7778881000-2874(4) to SIP/as5400-35c1(256)
WARNING[1872]: app_dial.c:1002 dial_exec: Had to drop call because I
couldn't make SIP/7778881000-2874 compatible with SIP/as5400-35c1

I have the following setup in the AS5400:

voice class codec 1
 codec preference 1 g729r8
 codec preference 2 g729br8

and the following in the sip.conf file:
[as5400]
disallow=all
allow=g729

It looks like it should be pretty simple  to get this working correctly.
My extensions.conf file has the line:

exten => _1NXXNXXXXXX,1,Dial(SIP/${EXTEN}@as5400) so I think it would
pass-thru fine since this is an outbound call.  I would not even mind
buying licenses if they were available for Solaris/SPARC but since I
don't see that happening anytime soon I hope to get passthru working,
since I would like to have over 24 calls up at a time over a T1
connection.

Anyone see anything that I'm mising here?

Thanks,

Brian