[Asterisk-Users] Disabling native bridging for IAX calls

[Gareth Blades]

I have found out that the reason why my call transfers are not working
when using the IAX protocol is because Asterisk is performing a native
bridge.
If I force the user of one of the clients to use a different codec so
that Asterisk is unable to do a native transfer then it works.

How can I disable native bridge for IAX calls?

I know for SIP you can put 'canreinvite=no' but this does not work.