(Radio) The following options, regarding the description of the H.248 connection model, are correct?
The connection model cannot be modified during a user session
When the session between the two users ends, the corresponding association is used
A media gateway that supports only point-to-point connections can allow three or more endpoints to exist in the --association at the same time
When the user call is successful, the empty connection starts to be created
(Multiple select) When there is a backbone fiber break or OLT does not detect the expected optical signal (L0S) alarm, the possible cause is that
Rogue ONU exists under the port
The port backbone fiber is faulty
Any power loss or failure under the port
The port laser is turned off