We installed a 560 with a linksys switch and the phones won't come up unless I use a ESW Cisco infront of the customer's switch. Tech support said there are some configurations that need to be made to the customer switch in order to eliminate the ESW.
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...