[cisco-voip] Cannot transfer an off net call to another codec through an h323 gw

[Anthony Kouloglou]

Hi,
i have problems in transfering an incoming call established with g711 
codec, to another device that uses g729.
So, there is a CCM 5.X with extensions 1XXX and 2XXX for example.

1.VGW (H323)
2. ExtA 1000
   ExtB 1001

3  ExtC 2000

A, B and voicegw are in the same devicepool and use g711.
C is in another device pool that use g729 for calls to the other device 
pool.

GW has 2 different voip dial-peers:
 one with g711 to connect with extensions A, B, and
 one with g729 to connect with C
and one pots dial-peer to call outside to the TELCO numbers

Incoming calls to vgw from the telco, work fine either to extensions A,B 
or C directly (depending on the dial-peer, it uses the appropriate codec).
When A, calls B directly, B can tranfer the call to C
When A, receives a call from the Telco, cannot tranfer it to C: the call 
drops and busy tone is played to both ends.

Does, h323 needs something special for this config?

thanks
anthony