The gRPC session has ended and the application can now return a new perCL.

Request Parameter	Type	Description
requestType	string	Context or reason why this request is being made. Will be `audioStream` - Call has been unbridged from a Conference and its `audioStream` is being invoked.
callId	string	Unique ID for this call, generated by FreeClimb. This is the call leg which has left the Conference.
accountId	string	Account ID associated with your account.
from	string	Phone number of the party that initiated the Call (in E.164 format).
to	string	Phone number provisioned to you and to which this Call is directed (in E.164 format).
callStatus	string	Descriptive status for the call. Valid values are: •`ringing` - Call is currently ringing. •`inProgress` - Call was answered and is currently in progress (not queued, not in conference). •`completed` - Call ended normally. •`busy` - Caller received a busy signal. •`failed` - Call could not be completed as dialed, most likely because the phone number was non-existent. •`noAnswer` - Call ended without being answered. •`canceled` - Call was canceled via the REST API while queued or ringing.
direction	string	String describing the direction of the Call – `inbound` for inbound calls, `outbound` for calls initiated via the REST API, or `outboundDial` for calls initiated by the `OutDial` command.
conferenceId	string	ID of the Conference from which the call leg was removed.
queueId	string	This is only populated if the request pertains to a Queue. Otherwise, it is set to null.