End users report bad video quality and voice choppiness on Cisco Collaboration endpoints. The engineer changed the device pool the users were in but did not correct the problem. Which action should be taken to troubleshoot this issue?
A. Restart the Cisco Location Bandwidth Manager service on the Cisco UCM publisher
B. Check for duplex/speed mismatches between the network port settings of the system and network switch
C. Use direct IP address calls between two endpoints to troubleshoot call quality issues
D. Set the service parameter Use Video Bandwidth Pool for Immersive Video Calls to “false”
