To enable digest authentication for third-party phones that are running SIP, the administrator must create a Phone Security
Profile. See the Cisco Unified Communications Manager Security Guide for details. On the Phone Security Profile Configuration window, check the Enable Digest Authentication check box. After
the security profile is configured, the administrator must assign that security profile to the phone that is running SIP by
using the Phone Configuration window. If this check box is not checked, Cisco Unified Communications Manager will use digest authentication for purposes of identifying the phone by the end user ID, and it will not verify the digest
password. If the check box is checked, Cisco Unified Communications Manager will verify the password.
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Cisco Unified Communications Manager does not support Transport Layer Security (TLS) from third-party phones that are running SIP.
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