= Yealink Ghost Calls =

End user complains of random ghost calls. Try the following.

 * Log into the phone web interface
  * Check firmware version - update to the latest if it is noticeably old
  * Change settings ref https://support.yealink.com/en/portal/knowledge/show?id=14404b55bd9e4ca05aba334b
   * Navigate to "Features", "General Information"
    * Allow IP Call - Disabled
    * Accept SIP Trust Server Only - Enabled