dial
Initiate a new outbound call. Provide either a url pointing to a SWML document
or an inline swml object to control the call flow.
Since from is a Python reserved keyword, pass it as from_= or use dict
unpacking: **{"from": "+15551234567"}.
Request
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
Returned when the call is a Fabric subscriber device leg. The status field is always null for this type.