Which two methods can be used to challenge the identity of an IP phone from a Cisco Unified CallManager server?
What two types of calls can cause the Cisco Unified CallManagerto send an ARQ to a gatekeeper to determine if a call should be routed?
What is the recommended trunk type to use on the Cisco Unified CallManager clusters for full intersite calling capability?
How many ICTs must be configured to provide full server redundancy if a gatekeeper is present in the network?