You are configuring digest authentication so that the identity of SIP phones can be challenged by the UCM to which they are connected. After configuring an appropriate security profile, you apply the profile to each SIP phone on the network. After creating a digest user in the UCM Administration End User window, you notice that a Cisco 7961G IP phone is not able to authenticate with UCM. Which of the following should you do? (Select 2 choices.)
A. Associate the digest user with the SIP phone in UCM Administration
B. Configure the SIP realm on a SIP trunk
C. Reset the phone
D. Specify digest credentials in the Application User Configuration window
E. Upload the configuration file to the TFTP server