Did you try to use in your orginate command {force_transfer_context=transfer_cxt}?

Like this when you get a refer from your B leg, you catch the refer and generate a bridge to refer_to_uri using your sip gateway in the above dialplan context.

I know it works with unattended refer message (without Replaces in refer_to uri) but i guess you can manipulate sip headers to make it work with attended transfer.

Srigo

On Wed, 11 Apr 2018, 07:47 Sharath Kumar, <shakumarsoftware@gmail.com> wrote:

Hello,

I use Freeswitch as a client. I am on version 1.6.20. I originate an outbound call via a SIp gateway the after the call is connected the far end (B party) sends me(the Freeswitch client- A party) a REFER to C. I understand that this is not supported. I was reading about loopback and also sofia loopback will help to have the extra dummy channel but it is not clear how to use them in this scenario. I just have an originate command to work with that I origiate to a SIP gateway. Should I first originate to a loopback and park it and then bridge it ? Any hints or suggenstions will be greatly appreciated?
thank you,
Shaks.
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