[Freeswitch-users] Leg A and Leg B flow

Hello good Morning. I am looking for a little help and I am grateful for it. I have this scenario, on an established call, where I have leg A, and leg B. (source, destination) By pressing a DTMF on the side of leg A, send leg B to another trunk for an IVR process, and when terminating the call on that IVR. Leg A and Leg B, come back together in the initial flow. How can I send to another trunk, and put leg A on hold? Currently I have thought that I can do something like that, but I don't know how to put the B leg on hold, and then put the channels back together. <action application = "bind_meta_app" data = "5 a a execute_extension :: 1234 $ {destination_number} XML other-validation" />