Understand the legs/parent/child of a Twilio call
<p>How do I differentiate the caller and the callee on a Twilio call?</p>

<p>Is that why there's a parent call and a child call for each call that's made?</p>

<p>Also if I merge two persons into a conference room, how do I differentiate who is who?</p>

<p>I need this in order to build a hold feature, which will move each leg of the call to different conference rooms.</p>

<p>Thanks,</p>