These functions are generally associated with call center software and are not built-in to the UC500. One option is to integrate the UC500 with Unified Contact Center Express. Take a look at the following link.
CallManager Express on the Uc500 has a Basic-ACD(B-ACD) service that does support queing and works in conjunction with huntgroups. While I do not know of a way to provide escalation with this product it does give limited Que and Agent stats.
Configure Multicast Paging on the Cisco IP Phone 7800 Series or 8800 Series Multiplatform Phone
The Cisco IP Phone 7800 and 8800 Series Multiplatform Phones provide voice communication over an Internet Protocol (IP) network...
Add Call Park on a Cisco 7800 or 8800 Series Multiplatform Phone Key Expansion Module
Call park allows the user of the phone to put an incoming call on hold so that the call can be retrieved on another phone. A call is park...