You can use the Hangup element to end a call if you don’t want to answer an incoming call on your Plivo number. The application attached to the Plivo number must return the Hangup XML element along with a
reason attribute to end the call.
The Hangup element supports these attributes. You can modify the behavior of each attribute using the allowed values.
Specifies the reason for the hangup.
Allowed values: rejected, busy
Used to schedule a call hangup. Should be followed by an element such as Speak; if not, the call will be hung up immediately.
Allowed values: integer > 0 (in seconds)