uc540 - connecting remote phone over vpn tunnel how ?
You should be able to reach 192.168.4.0, 10.1.1.0 and 10.1.10.0 if possible from 192.168.0.0 network. This can be arranged with the access lists on your vlan and/or wan interface on the UC540 and the other side of the VPN. If this is the only phone on the other network try adding the TFTP server manually to the phone also otherwise you can add option 150 to the DHCP server.
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...