Setting the system's number verification default behavior

Last Updated : Aug 30, 2026 |
This process sets the default behaviors applied by SIP lines on which calling number verification is enabled.
Prolog information
  1. Access the SystemVoIPVoIP Security settings.
  2. In the Calling Number Verification section, set the required behavior:
    ADDITIONAL INFORMATION:
    Field
    Description
    Incoming Calls Handling
    Default = Allow Not Failed
    Sets the defaults for which calls are accepted by the system based on the authentication level of the call. This default can be overridden in the individual line configuration.
    • Allow All - Allow all calls regardless of calling number verification.
    • Allow Validated - Only accept verified calls with full or partial attestation.
    • Allow Not Failed - Accept all calls expect those that specifically failed verification. Note this can include calls with no reported verification result.
    Validation Presentation
    Default = Off
    If enabled, the system will prefix the caller ID information displayed on phones with a character indicating the result of the call's validation result. This will be:
    • A tick mark for full verification.
    • A question mark for partial verification.
    • A cross for authentication failed.
    When enabled, the system will also inspect the display information on all received trunk calls to ensure they do not start with these characters in order to avoid spoofing.
  3. Save the settings.
Next steps