Re: How Many SIP Trunks does the UC540 and 560 Support
Theoretically, there is no maximum. If you need registration/authentication, you can do this for up to 6 registrars beginning with IOS 15.0(1)XA. Prior to this release, you could only register/authenticate to one registrar. See the following link.
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...