[Asterisk-Users] ilbc codec in Asterisk

[Stephen]

Hi all,

How can I use ilbc codec in asterisk? been trying to set allow=ilbc at 
my sip.conf and iax.conf but the call is format to ulaw, though I put 
allow=ilbc above allow=ulaw.

I have been tried for almost two weeks and now seeking experts for help. 
: ( .
need ilbc codec to reduce the total bandwidth used by asterisk.

Anyone can share their experience ?

Thanks,
Stephen