Analog Phone Security Profile
To establish an encrypted connection to analog phones, you must create a Phone Security Profile for analog phones with the Device Security Mode parameter set to Authenticated or Encrypted. To create a Phone Security Profile, navigate to in Unified Communications Manager Administration.
When you configure an analog phone attached to a Cisco VG2xx gateway, choose the secure analog profile you created for the Device Security Profile parameter. To configure the Device Security Profile parameter, navigate to in Unified Communications Manager Administration and scroll down to the Protocol Specific Information section for the phone you want to configure.