An engineer is configuring a new Cisco Unified Communications Manager server. However, when the engineer tries to register the IP phones, the registrations are unsuccessful. When the engineer checks one of the phones, there is no status that is shown along with the Cisco Unified Communications Manager server IP address. What is the probable cause?
The currently receiving call-processing services are running on the phone.
The server connection is established, but the information is encrypted.
The Cisco Unified Communications Manager server is currently available.
There is no current connection with the Cisco Unified Communications Manager server.