It's perfectly imaginable that a B2BUA could B2B a REFER request in the same way the bridge app B2Bs an INVITE.

On 15 May 2014 15:07, Gareth Rylance <gareth@rylance.me.uk> wrote:
We are acting as a nearly proxy. 
We want to look like a proxy by not really effecting the signalling  but apply alter the media stream. 


Gareth


On 15 May 2014 13:58, Brian West <brian@freeswitch.org> wrote:
If you wish to have proxy behavior then you’ll have to use a proxy, FreeSWITCH is a b2bua.  ;)
--
Brian West