Cisco Unified CallManager Administration groups security-related settings in the SIP phone security profile, which works like a template; that is, you configure the settings in the profile and then apply the profile to the SIP phone. After you apply the profile to the phone, it uses the settings that you configured in the SIP Phone Security Profile window. If you want to do so, you can use the same profile for many SIP phones, which eliminates having to configure the same fields multiple times.
The SIP Phone Security Profile window includes security-related settings such as Device Security Mode, Authentication Mode (for CAPF), Key Size (for CAPF), Enable Digest Authentication, Nonce Validity Time, Transport Type, and SIP Phone Port.
Tip All SIP phones require that you apply a security profile.
For information on configuring and applying a SIP phone security profile, refer to the Cisco Unified CallManager Security Guide.