16-2 provides examples of randomly selected country code assignments.
the establishment of a call from the source telephone to the destination telephone. However,
most routing is much more sophisticated. It lets subscribers select services or divert calls from
one subscriber to another. Dialing tables and SS7 are used for routing.
call arrives, the path to the desired destination and the types of services available are derived
from these tables or rules. It is important to know just how the routing and the associated
features are accomplished in the voice network because these functions might have to be
provided in an integrated voice-data network.
from one system to another. All calls are routed based on the configured dial plan. The dial plan
is a required configuration on the switch, PBX, or key system.