Limit Outbound Call Frequency of an Extension

To secure enterprise communications and reduce the economic loss if the PBX system has been hacked, we recommended that you set up rules to restrict the extension outbound call frequency.


  1. Log in to PBX web portal, go to Extension and Trunk > Extension, edit the desired extension.
  2. Click Security tab.
  3. Scroll down to the Call Restrictions section, in the Outbound Call Frequency Restriction drop-down list, select the desired rule (s).
    Note: The PBX has a default rule Default_Ext_Outbound Call Frequency, which limits extension users to make maximum 5 outbound calls in 1 second. You can add new rules according to your need. For more information, see Add an 'Outbound Call Frequency Restriction' Rule.
  4. Click Save and Apply.


If an extension has exceeded the outbound call frequency restriction, the following things would happen.
  • Users cannot make outbound calls even if the extensions are selected in outbound routes.
    Note: Emergency Calls like 911 is not restricted.
  • On Extension list, is displayed in front of the extension.
    Note: To cancel the restriction of outbound calls, click to edit the extension, go to Security tab and unselect the checkbox of Disable Outbound Calls in the Call Restrictions section.