This event is fired when a child call (a B leg on a call) is created. These always contain a reference to the parent call that caused them to be created. All child calls are outbound.
Has the value “child_call_created” for this event
A unique identifier for this call.
Id of parent call this call belongs to.
Either a username or E164 number (+ prefixed)
Extension dialed by user for outbound, E164 number dialed for inbound.
Minute rate for this call.
ISO 8601 Formatted date string.