What is the correct order for configuring call routing in Cisco Unified Communications Manager?
A. gateway and SIP trunk, route group, route pattern, route list
B. gateway and SIP trunk, route list, route group, route pattern
C. gateway and SIP trunk, route group, route list, route pattern
D. route list, gateway and SIP trunk, route group, route pattern
Some logic to the answer…
To implement path selection in CUCM, the call processing logic must be built from the bottom up. When the route group is created, devices are added to the route group. If the devices do not exist yet, there will be nothing to relate to the route group. The following steps have to be performed in the given order:
Step 1 Add devices (gateways and trunks).
Step 2 Build route groups from available devices.
Step 3 Build route lists from available route groups.
Step 4 Build route patterns pointing to route lists.
https://www.ccexpert.us/cisco-unified/cucm-path-selection.html
I agree with you.
C is the correct answer.
there is another similar question but the answer start from step 4 to step 1 :
route pattern-route list- route group-gateway and SIP trunk.