asterisk users - Nov 2003 - codec problems between * and cisco hardware h323

Hi all,

we use * as a voip gateway using h323 (chan_h323).
We purchased the g729 codec from digium for 10 channels.

But, if comes in a call from a cisco gatway or something similar, there're
problems with the codecs.
If such a call comes in following error occures :

Pitch 1st subfr. !    ! Wrong Pitch 1st subfr. !    ! Wrong Pitch 1st subfr.
!    ! Wrong Pitch 1st subfr. !    ! Wrong Pitch 1st subfr. !    ! Wrong
Pitch 1st subfr. !    ! Wrong Pitch 1st subfr. !    ! Wrong Pitch 1st subfr.
!    ! Wrong Pitch 1st subfr. !    ! Wrong Pitch 1st subfr. !    ! Wrong
Pitch 1st subfr. !    ! Wrong Pitch 1st subfr. !    ! Wrong Pitch 1st subfr.
!    ! Wrong Pitch 1st subfr. !    ! Wrong Pitch 1st subfr. !    ! Wrong
Pitch 1st subfr. !    ! Wrong Pitch 1st subfr. !    ! Wrong Pitch 1st subfr.
!    ! Wrong Pitch 1st subfr. !    ! Wrong Pitch 1st subfr. !    ! Wrong
Pitch 1st subfr. !    ! Wrong Pitch 1st s    -- Hungup 'Zap/1-1'h 1st
subfr.

I think these messages are from the codec_g729 module...

Knows anybody how can i get both, cisco and *, works together ?

Can somebody help ?

Thanks,
Thomas.