How do external callers reach specific extensions?


  • How does PISTON work to allow external callers to dial a phone extension?
  • How do I set PISTON so that outsiders can contact a user's extension?



  1. Ensure there is a main phone number that users can call to.
  2. Ensure there is a menu box in the callflow for the main phone number.
  3. Edit the Menu box and verify there is a checkmark to 'Allow caller to dial extensions'.
  4. Click Save.
  5. Have external callers call the main number and when reaching the menu audio greeting, simply press the extension to reach the phone extension user. 
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