Which parameter， when enabled on a standalone access point， gives the highest priority to a voice packeteven when QoS is not enabled？（）

A Cisco WCS version 4.0 has been installed on a server with a dual Pentium 3.0 GHz processor， 4 GBRAM， and an 80 GB hard drive. A location appliance has been incorporated into the network and is beingmonitored by the Cisco WCS. There are 3000 devices to be tracked but not all of them are being trackedon the Cisco WCS.
What can be done to correct the problem？（）

A Cisco Wireless Location Appliance has been added to track RFID tags placed on laptops being used in aschool. Classrooms at the school have concrete block walls. During testing， you discover that the accuracyof the system needs to be improved. You decide to edit the map in the Cisco WCS to add the interior walls.
How many interior walls can you add to improve the accuracy of the location appliance？（）

You are troubleshooting a problem with a Cisco 7920 wireless IP phone on a standalone WLAN. The phonerings but， when you answer， the call is dropped.
What may have caused this problem？（）