In the U1900 unified gateway, outgoing calls need to be configured in a certain order. The following configuration process is correct () Multiple choice

In the U1900 unified gateway, outgoing calls need to be configured in a certain order. The following configuration process is correct () Multiple choice
A . Office route selection code -> office route -> trunk -> prefix
B . Office route selection code -> Trunk -> Office route -> Prefix
C . Office route selection code -> prefix -> office route -> trunk
D . Office route selection code -> Trunk -> Prefix -> Office route

Answer: A,C