From Bright Pattern Documentation
Merge All Calls Into Conference
You can use the mergeAllCallsIntoConference method to merge all existing calls, both from customers and agents, into a single conference call.
The mergeAllCallsIntoConference method can be attached to a web element, such as a button, on your webpage. When clicked, the button will process the method. Optionally, field customTransferData can be used to define custom data to be transferred with the interaction to the receiving party.