Disconnect Supervision is a device requirement for the support of Call Preservation. Which of the following statements regarding Disconnect Supervision is valid? (Choose all that apply.)

A.
End User Release Disconnect Supervision is where the device can detect when the user of the connection has hung up.

B.
Timed Disconnect Supervision is where the device can detect when the user of the connection has hung up.

C.
End User Release Disconnect Supervision is used by devices when there is no end-user that has the ability to initiate the release of the connection.

D.
Timed Disconnect Supervision is used by devices when there is no end-user that has the ability to initiate the release of the connection.

E.
Media Streaming Failure (MSF) Disconnect Supervision is achieved by reacting to an “ICMP” port not reachable, received as a result of transmitting media packets.

F.
MSF stands for Multi Streaming Facility