Aastra Telecom 53I - Manual (Page 44)

Security Features
38 RN-001029-00, Rev 03, Release 2.1
IP Phone Release Notes 2.1
3 Click to save your changes.
Per-Line Configuration
1 Note: Setting a per-line SRTP configuration overrides the global SRTP configuration setting.
Click on Advanced Settings->Line <1-9>->RTP Settings.
2 Set the “RTP Encryption” field to one of the following settings:
• SRTP Disabled: IP phone generates and receives nonsecured RTP calls on this line.
• SRTP Preferred: IP phones generates RTP secured calls, and accepts both secured and
non-secured RTP calls on this line.
• SRTP Only: IP phones generates and accepts RTP secured calls only on this line; all other calls
are rejected.
3 Click to save your changes.
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