[cisco-voip] CME B-ACD transcoding

[tele]

Hi,

I've a WAN link that use g729 codec and my IP phone also use it.
on my CME configuration i point a number to a B-ACD script that need
g711ulaw for working, something like:

dial-peer voice 30 voip
 destination-pattern 11111
 session protocol sipv2
 session target ipv4:1.1.11.1
 no vad
!
dial-peer voice 31 voip
 service aa
 codec g711ulaw
 session protocol sipv2
 incoming called-number 11111
 dtmf-relay rtp-nte
 no vad


1.1.11.1 is a loopback address.

Is there a way to mantain g729 for the leg on the WAN side and g711 on
the AA and then g729 from CME to the IP phone?

like:
                     CME
WAN -----g729---->|AA(g711)|--g729---> SIP phone

I've read that CME support transcoding only for the endpoints, with CUE
this work cause i send the call to the CUE IP and another call-leg is
created to the CUE so it can be transcoded. The problem is if i use an
AA script on the dial-peer. 

Any ideas?

thanks

:tele