ABC Company has four locations total, all connected via an IP WAN. Each location has a Cisco
Unified Communications Manager cluster, and the headquarters cluster is connected to all other
clusters via intercluster trunks. ABC wants to allow up to eight simultaneous calls across the IP
WAN. To call between sites, an employee dials a 2-digit access code plus a 4-digit extension. If
more than eight calls are made, or if the IP WAN is not available, calls should be sent to ABC
Company’s preferred long-distance carrier. If the trunk to the long-distance carrier is not available,
the local provider should be used. The long-distance carrier requires 10 digits to complete a longdistance call. The local provider requires 11 digits to complete a long-distance call but only 7 digits
for local calls.
What is the minimum number of route lists required at the headquarters location?

A.
1

B.
2

C.
3

D.
4

E.
5