[Asterisk-Users] Codec translator problem (g723.1,ilbc => alaw)

[asterisk]

Hi, I cannot get SIP channel working with folowing codec configuration:

[sip]
disallow=all
allow=g723.1 ;I need this codec between sip phones (BT100)
allow=ilbc      ;Use this codec to others

Calling between BT100 SIP phones is OK - asterisk makes native bridge 
(with g723.1) between them.
When I'm calling from SIP to other channel (iax,zap,...), asterisk is 
not able to chose right codec and is trying transalate g723.1 to alaw, 
instead of choose ilbc and translate to alaw.

Thanks in advance

Petr Michalek