Yealink SIP T46G Administrator's Manual page 209

Administrator's Guide for SIP-T46G IP Phone
To configure TLS on a per-account basis via web user interface:
1. Click on Account.
2. Select the desired account from the pull-down list of Account.
3. Select TLS from the pull-down list of the Transport.
4. Click Confirm to accept the change.
To configure the trusted certificates feature via web user interface:
1. Click on Security->Trusted Certificates.
2. Select the desired value from the pull-down list of Only Accept Trusted Certificates.
3. Select the desired value from the pull-down list of Common Name Validation.
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Navigate to:
http://<phoneIPAddress>/servl
et?p=server-cert&q=load