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How to Block External Calls and Allow Internal Calls Only
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How to Block External Calls and Allow Internal Calls Only



To block all external calls and allow internal calls only. This is commonly use for test or laboratory phones where all external calls should be restricted.

Applies To

  • Work for Desktop
  • Virtual Office Online


  1. Log in to Work for Desktop.
  2. Click Settings (Gear).
  3. Under Settings, go to Account Settings.
    VO2 (1).PNG
  4. Go to Call Forwarding, and click +Add New Rule.
  5. Create a rule to Allow Internal Calls.
    • Under Call From, Choose "Or any of the phone numbers listed below."
    • Enter the extensions that can call this line, then click Add.
    • Press OK to apply the rule.
      Allow Internal Calls2.PNG
  6. Create another rule for Blocking External Calls.
    • Click +Add New Rule.
    • Choose "Anyone," then go to "Forward to" and choose "Drop Call (Caller will hear busy signal)."
    • See to the images below for reference.
      Block External Calls.PNG
      Block External Calls2.PNG
  7. By now, you should have two (2) active rules for both Allowing Internal Calls and Blocking External Calls. Click Save to apply both advance call forwarding rules.
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