Which three steps must be completed in order to assign a service URL to an IP phone button?
(Choose three.)
A.
Add an IP phone service.
B.
Subscribe the phone to the service
C.
Associate a valid user profile with the phone.
D.
Assign the IP phone service partition to the CSS of the phone.
E.
Create a soft key template that includes a service URL and assign it to the phone.
F.
Create a phone button template that includes a service URL and assign it to the phone.