How to add codec translation?

Hi all,

how can I add g723 codec translation ? I need translation with alaw…
My show translation :
g723 gsm ulaw alaw g726 adpcm slin lpc10 g729 speex ilbc
g723 - - - - - - - - - - -
gsm - - 2 2 3 2 1 5 - - 18
ulaw - 3 - 1 3 2 1 5 - - 18
alaw - 3 1 - 3 2 1 5 - - 18
g726 - 4 3 3 - 3 2 6 - - 19
adpcm - 3 2 2 3 - 1 5 - - 18
slin - 2 1 1 2 1 - 4 - - 17
lpc10 - 4 3 3 4 3 2 - - - 19
g729 - - - - - - - - - - -
speex - - - - - - - - - - -
ilbc - 5 4 4 5 4 3 7 - - -

G.723 is not commonly used with Asterisk. Your first step to using it is licensing, take a look at this page: http://www.dspg.com/technology/LicensePricing.html