[Asterisk-Users] iax preferred codec question?

[Atuc]

hallo,

could somebody help me, i would like to select ilbc as preferred codec but 
dont disable gsm totally, i can only make a call with ilbc if i disable the 
gsm codec in iax.conf,

if i enable gsm and make call to the same enpoint, always the gsm codec is 
choosen as audio codec.

any idea whats wrong here? how to choose a preferred codec without 
disabling gsm?
thanks for help,
alex

[krmtu]
type=friend
secret=mypass
username=krmtu
notransfer=no
auth=md5,plaintext,rsa
host=dynamic
context=default
;allow=all
disallow=all
allow=ilbc
allow=gsm
callerid="krmtu"<1114>
mailbox=1114