Editing an internal number

Clicking the edit icon next a previously configured internal number, or on the number itself will allow you to edit it. Initially in the Number details tab, you'll see the same options as when adding a new number, but you'll also see an Advanced settings tab to configure additional options:

The Caller ID prefix will allow you to add a prefix to the caller ID that'll be displayed to the receiving party, and you can also enable or disable caller ID passthrough if you want to send the original caller ID if the call is being forwarded.

Just press Save at any time to apply any configuration changes, or Delete if you want to remove the internal number from your phone system.