Two possibilities exist for removing extensions from device lines.
To unassign an extension, right-click on the extension in the extensions list and select Unassign. This will result in the phones line becoming a free port and the extension becoming a free extension. The extension will remain in any inbound routes,destinations (queues and ring groups) and flex-path contexts and can be logged in to from any free port by dialling the *11 feature code (See section 3.7.5-section on hot desking )
To delete an extension, right-click on the extension in the extensions list and select Delete. This will result in the line on the phone becoming a free port, and the extension being deleted. The extension will be removed from any inbound routes, queues, ring groups, flexpaths and other internal destinations.
<Figure/Illustration 2 showing free extensions and the unassign options)