Is Netflow enabled in the always-on Sandbox

Working on the always on Sandbox. when i do a GET on /policy/flow it returns session info as provided below

       + destIP=10.1.15.117

       + interfaceName=GigabitEthernet1/0/47

       + sourceIP=10.1.12.20

       + networkDeviceId=5b5ea8da-8c23-486a-b95e-7429684d25fc

       + id=f4cd53b7-18e4-4c48-94e1-dcfe2548ba75

       + protocol=udp

       + networkDeviceName=CAMPUS-Access1

       + clientReference=client123

       + status=ACCEPTED_DELETE

       + flowType=VOICE

       + interfaceId=6e4e5ae6-6045-4060-9038-1a64d5a101cc

       + destPort=5060

 Where is the session info coming from. Does netflow need to be enabled on all switches to be able to provide this info.

 There is an API that Cisco Communications Manager (or other voice systems) can use that allows you to specify a source/destination IP/port for voice and video streams.

 The QoS markings will dynamically be assigned to the point of ingress onto the network (e.g. interface on a switch port) that the host is attached.

 You delete the policy when the call is torn down and the QoS policy is removed.