From looking through the source (and some light experimenting), it looks like blind transfers don't work unless the call is bridged. This means they don't work in a conference. That makes sense (the behavior would be undefined).

However, I have a case in which I want this behavior, and am looking to see if anyone has done anything similar. Say two people join a call together, then a third gets added. When the third is added, all participants are moved into a conference. Now, #3 drops off, and it's just 1 and 2 again.

It doesn't seem like there's any straight forward way of allowing 1/2 to initiate blind transfers, is that right? Has anyone else encountered this issue? Should I just be dynamically pulling people out of and adding them back into conferences in this case?

Ideally, there'd be a way to specify conference transfer behavior such that when in a conference, blind transfers can still work so long as there are exactly two people in that conference. Would this be a welcome addition?

Best,

Colin