What Is Two-Stage Dialing?
When a voice call is destined for the network, the router placing the call collects
all the dialed digits. It then takes these digits and filters them through the dial
peers to see if there is a match. Once a match is found, the router then immediately
places the call by forwarding the dialed string. Once the call is forwarded,
the router no longer collects digits for that session and they are dropped. Digits
and wildcards used in the destination pattern choose how many digits the router
collects before it tries to filter them through the dial peers.