When setting up a VoIP call, what is the first thing a gateway router tries to match to a dialed number?
A.
call leg
B.
IP route
C.
session target
D.
destination pattern
Explanation:
First, the gateway attempts to match the called number with the incoming called-number. If no match is found, the router or gateway attempts to match the calling number of the call set-up request with the answer-address of each dial-peers. If no match is found, it attempts to match the calling number of the call set-up request to the destination-pattern of each dial-peer.Notice that these steps are just applied for inbound dial peer.