refer
Send a SIP REFER on an active call. This initiates a SIP-level transfer,
asking the remote endpoint to connect to a new destination. Unlike
transfer(), which is
handled by SignalWire, a SIP REFER delegates the transfer to the remote
SIP endpoint.
SIP REFER is only applicable to SIP calls. It will not work on PSTN calls.
Request
id
The unique identifying ID of a existing call.
params
An object of parameters that will be utilized by the active command.
Response
Call Leg
Returned when the call is a standard PSTN, SIP, or WebRTC call.
OR
Fabric Subscriber Device Leg