[asterisk-users] command - set sip_codec- does not work with asterisk-1.4.21

[lizhong zhu]

hello:
i want to test the g729 with asterisk. my scenario  is sipp(ulaw)->asterisk1 with g729->asterisk2 with g729.
I want to test g729 module with asterisk-1.4.21, when i make calls from asterisk 1 to asterisk 2, the asterisk 1 always send ulaw to asterisk 2. my sip in asterisk 1 is with codec g729 and enforce that use g729, the sip in asterisk 2 also work with G729 only, but asterisk 2 reports the condec compatibility  problem. both of asterisks can show g729 are there. 
===================================
exten => 2005,1,Answer
exten => 2005,2,Set(${SIP_CODEC}=g729) // does not work
exten => 2005,3,DIAL(SIP/1000 at 192.168.2.127,30,r)
exten => 2005,4,Hangup
===use sipp t call asterisk 1 then forward to asterisk 2 with sip 1000.
------------------sip.conf ----------------------------------------------------
[1000]
username=1000
allowtransfer=yes
type=friend
secret=1000
qualify=yes
canreinvite=yes
host=dynamic
insecure=very
fromuser=1000
;dtmfmode=rfc2833
disallow=all
allow=g729
;allow=ulaw
;allow=alaw
context=internal
--------------------------------------------
when the calls coming from asterisk 1, i can not see any g729 inforamtion, the Noop(${SIP_CODEC}) show nothing. 
some people reported the bug for sip_codec, i followed that, but i still can not. sovle. anyone knows how  to set sip_codec in dialplan or have any right format for set sip_codec in dialplan?
thanks!
zhu


       
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